Readings MD 1 PDF

READINGS MD 1 1. Device used to measure accurately speed: A. speedometer B. dial indicator C. tachometer D. dial gauge The answer is: C 2. When the hole is smaller than the shaft, it will take pressure to put the parts together. The allowance is said to be n...

READINGS MD 1 1. Device used to measure accurately speed: A. speedometer B. dial indicator C. tachometer D. dial gauge The answer is: C 2. When the hole is smaller than the shaft, it will take pressure to put the parts together. The allowance is said to be negative and is termed: A. negative tolerance B. negative allowance C. negative fits D. interference of metal The answer is: D 3. When two elastic bodies collide, which of the following laws can be used to solve for the resulting velocity? A. Dalton’s law B. Avogadro C. Conservation of energy D. Conservation of momentum and Conservation of energy The answer is: D 4. The ability of a metal to be deformed considerably without rupture is called: A. plasticity B. all of these C. ductility D. malleability The answer is: A 5. Permanent deformation or strain may occur without fracture: A. malleability B. elasticity C. ductility D. plasticity The answer is: C 6. It is a science of motion that can be solved in terms of scalar or vector algebra: A. kinematics B. curvilinear translation C. projectiles D. acceleration The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 1 7. A system of forces in space is in equilibrium. If two equal and opposite collinear forces are added, which of the following if any is true? A. equilibrium is destroyed B. equilibrium is maintained C. none of these is true D. an unbalanced of moment exist The answer is: B 8. Metal that assists lubrication or lubricant in itself: A. zinc B. antimony C. Babbitt D. lead The answer is: C 9. A mechanism which usually do the indexing in a machine tool: A. universal chuck B. slotter C. dividing head D. indexing The answer is: C 10. It equalizes the energy exerted and the work done thus preventing excessive or sudden changes of speed: A. flywheel B. balance of wheel C. all of these D. flywheel pulley The answer is: C 11. The smallest are at the point of rupture of a tensile specimen divided by the original area is called: A. percentage elongation B. Izod test C. Charpy test D. percentage reduction of area The answer is: D 12. The product of the resultant of all forces acting on a body and the time that the resultant acts: A. angular impulse B. angular momentum C. linear impulse D. linear momentum The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 2 13. Which of the following is not a structural class of steel? A. low carbon steel B. tool and die steel C. high chrome alloy steel D. high strength low alloy steel The answer is: B 14. Poison’s ratio is the ratio of: A. shear strain to compressive strain B. elastic limit to compressive strain C. lateral strain to longitudinal strain D. elastic limit to proportional limit The answer is: C 15. All are associated with the grade of steel except: A. SAE 43XX B. SAE 13XX C. SAE 10XX D. SAE 74XX The answer is: D 16. A property of material which relates the lateral strain to the longitudinal strain: A. stress B. strain C. Poison’s ratio D. strength The answer is: C 17. The maximum stress to which a material may be subjected before failure occurs: A. ultimate strength B. ultimate stress C. endurance limit D. tensile stress The answer is: B 18. Hypoid gear is a special type of gear like: A. worm gear B. spur gear C. herringbone gear D. bevel gear The answer is: D  This file is strictly for viewing only. Contents are not allowed to be edited. Page 3 19. Considered a maximum safe center distance of sprockets should be ____ pitches. Very long center distance cause catenary tension in the chain. A. 70 B. 80 C. 60 D. 50 The answer is: B 20. Cold working of steel plates makes the metal: A. tougher B. more ductile C. harder D. more malleable The answer is: C 21. Recommended best cutting angle of drill for work on steel or cast iron is ____ degrees. A. 48 B. 63 C. 59 D. 50 The answer is: C 22. In shear pin or breaking pin design, we may use the data experienced by link belt from 1/8 inch to 1-inch pins and the breaking stress is ____ ksi. A. 40 B. 55 C. 50 D. 48 The answer is: C 23. Deals only with the motion of bodies without reference to the forces that cause them: A. dynamics B. kinetics C. static D. kinematics The answer is: D 24. The property that characterizes a material ability to be drawn into a wire: A. ductility  B. thermal conductivity C. tensile strength D. endurance limit The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 4 25. One of the causes of spur gear tooth breakage is the unbalanced load on one end of the tooth that results in higher stresses than when the load is evenly distributed. To minimize this problem, the face width “b” should not be greater than the thickness (or pitch) of the tooth. In the absence of test values, the following can be a guide: A. 2.5 Pc < b < 4 Pc B. 2.0 Pd < b < 4 Pd C. 2.5 Pd < b < 4 Pd D. 2.0 Pc < b < 4 Pc The answer is: A 26. The three moment of equation may be used to analyze: A. tapered column B. continuous beam C. composite beam D. axially end loaded beam The answer is: B 27. What is the common shop practice to prevent solder from running away from surface to be joined? A. all of these B. surround the work with clay C. introduce around the work rolled wet cloth D. put asbestos sheeting around the work The answer is: A 28. Non-ferrous filler metal is melted into grooves or as fillet on the mother metal; the base metal is not melted. This is commonly used for joining iron-based machine parts or in repair works of some materials. It is called: A. spot welding B. braze welding C. brazing D. gas welding The answer is: B 29. It is advised that in rubber belts application/mounting, it should have an initial tension of _____ inch/ply. A. 18 to 24 B. 15 to 20 C. 12 to 15 D. 10 The answer is: B 30. Normal stress relieving temperature for cast steel: A. 200 to 350oF B. 400 to 500oF C. 300 to 400oF D. 450 to 550oF The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 5 31. Most effective alloying element for reducing brittleness of steel at very low temperature: A. manganese B. Molybdenum C. Silicon D. nickel The answer is: D 32. Statement that a given body is in static equilibrium means that the body cannot: A. have any type of motion B. be acted upon by more than one force C. undergo any displacement D. have any acceleration The answer is: A 33. Ordinary steel begins to lose strength and elasticity significantly at about ____°F. A. 900 - 1000°F B. 800 - 900°F C. 750 - 850°F D. 600 - 700°F The answer is: D 34. Clearance to a new boiler installation to the existing or old plant building should follow a minimum clearance of _____ between top of the boiler proper and the ceiling as stated in the PSME Code. A. 2000 mm (max) B. 1000 mm (max) C. 2130 mm (max) D. 2150 mm (max) The answer is: C 35. For a high corrosion resistant stainless steel, what minimum chromium content is required? A. 8% B. 4.3% C. 1.1% D. 5.8% The answer is: A 36. Name the type of chuck commonly used for holding workpiece in a lathe operation? Example. 3 - jaw universal chuck, 4 - jaw independent chuck.  A. magnetic chuck B. 2- jaw independent chuck C. 8 - jaw universal D. combination The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 6 37. V-belts operate efficiently at speed of about (fpm): A. 4500 B. 4400 C. 4200 D. 3600 The answer is: A 38. What type of gear is used for high-speed operation? A. helical B. spur C. bevel D. worm The answer is: A 39. In a pair of gears, ______ is the plane perpendicular to the axial plane and tangent to the pitch surface. A. pitch B. pitch plane C. pitch circle D. pitch point The answer is: B 40. The phenomenon of continuous stretching under load even if the stress is less than the yield point: A. elasticity B. ductility C. plasticity D. creep The answer is: D 41. A machinery operation whereby done with the work accurately fastened has a reciprocating (forward and backward) motion and the tool head is stationary. A. shaping B. planning C. turning D. reaming The answer is: B 42. The following pertain to joining of metals except: A. welding  B. soldering C. casting D. brazing The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 7 43. Killed steel is always associated with: A. silicon B. manganese C. phosphorous D. sulfur The answer is: A 44. The usual ratio of water to soluble oil used as cutting fluid: A. 50% of water to 50% of oil B. 2 water to 1 oil C. 3 water to 1 oil D. 4 to 80 water to 1 oil The answer is: D 45. The good deoxidizer in steel melting: A. manganese B. silicon C. all of these D. aluminum The answer is: C 46. Good stabilizer in stainless steel A. columbium B. titanium C. all of these D. tantalum The answer is: C 47. What are the common cutting fluids used for cutting metals? A. all of these B. water with soda or borax C. light mineral oil D. soluble oil The answer is: A 48. It is considered semi-solid lubricant: A. all of these B. lube oil  C. graphite D. grease The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 8 49. Metals are conductive because: A. the electrons are loosely bound to the nuclei and therefore mobile B. having a characteristics metallic luster C. they are on the left side for the periodic table D. they have extra electrons as exhibited by normally possible balance state The answer is: A 50. The yield strength of a regular yellow brass (65 to 75% Cu, 30 to 35% Zn) can be increased /improved by: A. cold working B. tempering C. chill casting D. heat treatment The answer is: A 51. Used in as cast condition steel casting with carbon content less than ____% C. A. 0.26 B. 0.15 to 0.18 C. 0.20 D. 0.25 The answer is: C 52. Liners normally made of: A. cast iron B. alloyed bronze C. alloyed steel D. alloyed aluminum The answer is: A 53. Endurance strength is nearly proportional to the ultimate strength but not with _____. A. yield strength B. design stress C. shear stress D. all of the above The answer is: A 54. A furnace in melting non-ferrous metals: A. cupola furnace B. crucible furnace C. induction furnace D. tempering furnace The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 9 55. A furnace used in melting ferrous metals: A. annealing furnace B. tempering furnace C. induction furnace D. normalizing furnace The answer is: C 56. In the gear design, the total work must be equally shared by its arms. Rim must be rigid to support these arms and also the bead is recommended for its stiffening value. The assumption in the detailed design of rim thickness and depth of bead is ______ circular pitch (PC). A. 0.65 B. 0.50 C. 0.56 D. 0.44 The answer is: C 57. Tooth width measured along the chord at the pitch circle: A. flank B. face width C. width of space D. chordal thickness The answer is: D 58. The best instrument for measuring a thousand of an inch: A. micrometer B. tachometer C. caliper D. pyrometer The answer is: A 59. All are associated with standard material specification except: A. American Iron and Steel Institute B. Society of Automotive Engineers C. Southeast Asia Iron and Steel Institute D. American Society for Testing Materials The answer is: C 60. Machine tool used for laying straight lines on metal surfaces made of sharp tool steel is called: A. plain scriber B. a trammel C. hermaphrodite caliper D. divider The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 10 61. It is the difference of addendum and dedendum which is equivalent to the whole depth less working depth. A. fillet space B. fillet radius C. clearance D. backlash The answer is: C 62. A lathe machine threading mechanism: A. reverse gear and lever B. spindle gear C. all of these D. change stud gear The answer is: B 63. Separate forces which can be so combined are called: A. non-concurrent forces B. couple C. combined forces D. concurrent forces The answer is: D 64. That property of matter which causes it to resist any change in its motion or state of rest: A. brake B. friction C. inertia D. impulse The answer is: C 65. Negative allowance is also called: A. interference of metal B. fit C. tolerance D. allowance The answer is: A 66. Which of the following is not used to resemble the shape of tool bit? A. round nose B. center cut C. square nose D. thread cutting The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 11 67. A kind of thread in which the width of the thread is approximately equal to the depth of the thread and the space between threads are approximately equal. A. square thread B. Acme thread C. buttress thread D. Whitworth thread The answer is: A 68. For moderate speed of mating gears, the ideal ratio of contact is: A. 1.25 – 4 B. 1.2 - 1.45 C. 1 - 1.3 D. 1.35 - 1.45 The answer is: A 69. Ratio of unit lateral deformation to unit longitudinal deformation: A. Poisson’s ratio B. strain C. elongation D. Modulus of Elasticity The answer is: A 70. A lathe with multiple cutting stations: A. Turret lathe B. lathe C. shaper D. none of the above The answer is: A 71. Nominal diameter of bolts is the: A. major diameter B. minor diameter C. pitch diameter D. base diameter The answer is: A 72. Major and minor diameters are commonly used in: A. screw thread B. bolts C. gear D. all of these The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 12 73. The distance a helical gear or worm thread along its axis in one revolution if it were free to move axially is called ____. A. length of action B. line of action C. land D. lead The answer is: D 74. Length of contact between two mating parts in a screw and nut threads measured axially is called: A. arc of contact B. depth of engagement C. length of engagement D. axis of contact The answer is: C 75. If the velocity of a mass is small all the time during which motion takes place is called: A. deceleration B. uniform motion C. acceleration D. none of these The answer is: B 76. The property of material that relates the lateral strain to longitudinal strain: A. stress B. strain C. Poisson’s ratio D. endurance limit The answer is: C 77. Also called eccentrically loaded bearing is _____. A. full bearings B. offset bearings C. partial bearing D. fitted bearings The answer is: B 78. In the selection of wire rope, regular lay means wires and strands are arranged in the following manner. A. twisted in the same direction B. twisted in any direction C. twisted in opposite direction D. twisted in along direction The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 13 79. In involute teeth, the pressure angle is often defined as the angle between the line of action and the line of tangent to the pitch circle. It is also termed as: A. helix angle B. angle of recess C. angle of obliquity D. arc of action The answer is: C 80. For a mechanical plant with capacity of 300 kw or over but not more than 2000 kw, the personnel required must be at least. A. ME B. PME C. CPM, ME & PME D. PME & ME The answer is: C 81. Divide 1/8 to 8. A. 1 B. 8 C. 2 D. 64 The answer is: A 82. Which of the following product of combustion that has a property of resilience? A. grease B. graphite electrode C. rubber D. graphite powder The answer is: C 83. Height of tooth above pitch circle or the radial distance between pitch circle and top land of the tooth. A. top root B. addendum C. land  D. hunting tooth The answer is: B 84. The function of clutch in the machine is: A. lowering of drive speed B. alignment of drive shaft C. to disconnect or connect the drive at will D. to ensure that two shafts line up at high speed The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 14 85. It is normally recommended and normal for a designer to add a hunting tooth to evenly distribute the wear on meshing teeth like a 53 teeth gears with 30 teeth pinion. Find the rotation of pinion to mesh with same pair of teeth again. A. 120 B. 81 C. 61 D. 53 The answer is: D 86. The angle made by the helix of the thread (in a straight thread) at the pitch diameter with a plane perpendicular to the axis is called: A. lead angle B. truncation C. lead D. angle of thread The answer is: A 87. The rule of thumb in journal bearing design; the clearance ratio/clearance should be: A. 0.0090 B. 0.0042 C. 0.0010 D. 0.00120 The answer is: C 88. The moment of inertia of a rectangle whose base is “b” and height “h” about its base is: A. bh3/4 B. bh3 /12 C. bh3/24 D. bh3/3 The answer is: D 89. Cold rolled shafting is not available in diameter larger than ______. A. 6 inches B. 5 inches  C. 6 1/2 inches D. 5 1/2 inches The answer is: B 90. The cast iron flywheels designed with a factor of safety of ______. A. 14 to 15 B. 10 to 13 C. 8 to 9 D. 6 to 12 The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 15 91. A pair of equal and opposite (not collinear) forces that tend to cause a rotation of a body. A. couple B. centroid C. equilibrium D. vector The answer is: A 92. The ratio of the pitch diameter in inches to the number of teeth. A. pitch circle B. English module C. module D. pitch diameter The answer is: B 93. ______ is a unit of energy? A. ft-lb B. hp C. Btu/hr D. watt The answer is: A 94. When high strength and durability are a requirement for choosing gear materials it is preferable to use ______ material. A. hardened bronze B. steel C. phenolic laminated D. white iron The answer is: B 95. _____ forces when action are parallel. A. couple B. non collinear C. resultant D. non concurrent The answer is: D 96. The product of the mass and the velocity of the center of gravity of the body is called: A. linear momentum B. angular impulse C. linear impulse D. angular momentum The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 16 97. The distance between similar, equally spaced tooth surfaces in a given direction and along a given line. A. pitch circle B. pitch plane C. pitch D. pitch diameter The answer is: C 98. Could be defines as simply push or pull. A. power B. inertia C. work D. force The answer is: D 99. Opposite directional forces equal in magnitude and parallel is called ______. A. non coplanar B. centro C. couple D. coplanar The answer is: C 100. Quantities such as time, volume and density are completely specified when their magnitude is known is also called _______. A. couple B. resultants C. components D. scalar The answer is: D 101. Designed 200 kw plant must be at least A. PME B. CPM C. ME and PME D. none of these The answer is: A 102. The separate forces which can be so combined are called. A. concurrent forces B. non concurrent forces C. couple D. component forces The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 17 103. Maximum plant capacity in which a licensed ME is allowed to operate, tend or maintain. A. 300 kw B. 1000 kw C. 2000 kw D. 3000 kw The answer is: C 104. When the motion is diminished / decreasing instead of increasing is called: A. deceleration B. uniform negative impulse C. retarded motion D. all of these The answer is: C 105. The most known lubricants being utilizes in whatever category of load and speed are oil, air, grease and dry lubricants like: A. bronze B. lead C. silicon D. graphite The answer is: D 106. A coupling that allows axial flexibility movement in the operation. Made of alternate bolting of steel, leather, fabric, and / or plastic material into two flanges. A. flexible disk coupling B. flexible toroidal spring coupling C. flexible Oldham coupling D. elastic material bonded coupling The answer is: A 107. It consists of two cranks, a stationary piece called the line of centers, and the connecting rod is a: A. five-bar linkage B. four crank braces C. three crank linkage  D. four bar linkage The answer is: D 108. Used to change rotary motion to reciprocating motion _____. A. rack gears B. hypoid gears C. helical gears D. herringbone gears The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 18 109. The effective face width of a helical gear divided by gear axial pitch. A. Approach ratio B. Arc of action C. Arc of recess D. Face overlap The answer is: A 110. Pitch diameter less the diameter of the roller chain is equal to: A. top land B. bottom diameter C. addendum D. inside diameter The answer is: B 111. Generally applied on speed reducer due to large speed ratio. A. bevel gears B. helical gears C. worm gears D. hypoid gears The answer is: C 112. If the shaft size is specified as diameter 2.00” max and 1.99” min in diameter then the 0.010” could be defined as ______. A. allowance B. fit C. variance D. tolerance The answer is: D 113. A material plane was subjected to a load. When the load was removed, the strain disappeared. From the structural change, which of the following can be considered about this material? A. it has high modulus of elasticity B. it does not follow Hooke’s law C. it is plastic  D. it is elastic The answer is: D 114. Helix angle in the range of ____ degrees is recommended for wide-face helical gears. A. less than 15 B. less than 20 C. 20 to 35 D. 20 to 22 The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 19 115. Difference between maximum material limits of mating parts. Or it is a minimum clearance or maximum interference between parts. A. tolerance B. fits C. variance D. allowance The answer is: D 116. The concave portion of the tooth profile where it joins the bottom of the tooth. A. root circle B. fillet radius C. fillet curves D. fillet The answer is: C 117. The changes in shape or geometry of the body due to action of a force on it is called deformation or ______. A. shear stress B. stresses C. compressive stress D. strains The answer is: D 118. For an evenly and uniform wear on each meshing gear tooth, the ideal design practice is to consider a _________. A. wear resistance alloy addition to tooth gears B. heat treatment of the gears C. hardening of each tooth D. hunting tooth addition The answer is: D 119. The reciprocal of a diameter pitch of the ratio of the pitch diameter to the no. of teeth. A. lead B. module C. involute  D. clearance The answer is: B 120. Ability to resist deformation under stress. A. plasticity B. all of these C. stiffness D. toughness The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 20 121. Flat leather belting not recommended for used in a speed in excess of _____ fpm. A. 3600 B. 4800 C. 6000 D. all of these The answer is: C 122. The angle included between the sides of the thread measured in an axial plane in a screw thread. A. Angle of thread B. Angle between thread or 40o C. Helix angle thread D. Half angle thread or 20 o The answer is: A 123. An elastic body whose primary functions is to deflect under load: A. clutch B. stopper C. brake D. spring The answer is: D 124. Poisson’s ratio is the ratio of: A. elastic limit to yield strength B. lateral deformation to the longitudinal deformation C. shear strain to unit strain D. elastic limit shear strength The answer is: B 125. Manganese steel standard designation, SAE ______. A. 13XX B. 10XX C. 11XX D. 8XXX The answer is: A 126. One of these materials is not a structural steel? A. low carbon steel B. tool and die steel C. stainless and steel D. medium carbon steel The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 21 127. The ratio of moment of inertia on a cross-section of a beam to this section modulus is: A. a measure of distance B. equal to the radius of gyration and compression C. multiplied by the bending moment of inertia to determine the yield stress D. equal to the area of the cross-section and tension The answer is: A 128. The SAE 2340 shafting contains _____% nickel. A. 3.85 Ni B. 4% Ni C. 3.25 to 3.75% Ni D. 3.84% Ni The answer is: C 129. To operate, tend or maintain or be in charge of the operation, tending or maintenance of any mechanical works, projects or plants, of over 2,100 kw, he must be a duly licensed _________. A. ME B. CPM C. PME D. CPM, ME and PME The answer is: C 130. Chromium steel standard designation, SAE_____. A. 92XX B. 5XXX C. 3XXX D. 11XX The answer is: B 131. Alloy that improves strength of steel at high temperature application. A. aluminum B. Manganese C. Silicon D. chromium The answer is: D 132. When the air entrainment agent is put into a concrete mix: A. the water/cement ratio must be reduced B. the strength will decrease C. minimal defect D. the strength will suffer up to 50% The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 22 133. In general, alloys with high nickel content retains toughness to quite low temperatures up to _____°F. A. -380 B. 400 C. -260 D. -320 The answer is: D 134. The differential of the shear equation is the ______. A. deflection of the beam B. compressive strength of the beam C. tensile strength of the beam D. load on the beam The answer is: D 135. It is recommended not to have direct drive between driven and drive sprockets if the ratio of their teeth exceeds _____. Use 2 or more step combinations. A. 10 times B. 8 times C. 5 times D. 6 times The answer is: A 136. The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1.25 D to 2D, where D is the shaft diameter. The reasonable diameter of steel hub should be: A. 2D B. 1.8D C. 1.55D D. 1.20D The answer is: B 137. The sum of their addendum and dedendum. A. whole depth B. full depth C. width of space D. working depth The answer is: A 138. It is recommended for high speed application that the minimum number of teeth in small sprockets should be _____. A. 26 to 30 B. 12 to 16 C. 26 to 28 D. 18 to 24 The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 23 139. Stresses that are independent of loads is called _______. A. working stress B. residual stresses C. simple stress D. combined stress The answer is: B 140. Material having a high electrical resistance and should not be used as conductor of electrical current. A. nickel B. aluminum oxide C. silicon base alloys D. iron oxide The answer is: A 141. The best material for brake drums is: A. aluminum B. cast iron C. steel material D. wrought iron The answer is: B 142. The alloy materials used in the production of metal working tools. A. titanium, phosphorous B. tungsten, silicon, hadfield mn. C. vanadium, chromium, molybdenum D. high carbon steel The answer is: D 143. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of _____ degree/foot of length. A. 0.4 to1 B. 0.1 to 1 C. 0.08 to 1 D. 0.6 to 1 The answer is: C 144. If the pitch of a screw is 2/9 find the thread per inch. A. 0.34 B. 4.5 C. 5.4 D. 17 The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 24 145. The property that characterizes a materials ability to be drawn into a wire: A. tensile strength B. ductility C. endurance limit D. thermal conductivity The answer is: B 146. Which of the phases of steel elements has a face-centered cubic structure? A. pyrite B. austenite C. all of these D. cementite The answer is: B 147. Steel spring material is usually hardened to 400 to 500 BHN and the carbon content is in the range of _______. A. 0.50 to 0.90% B. all of these C. 0.45 to 0.48 D. 0.96 to 0.97 The answer is: A 148. Principal stresses occur on these planes: A. which are subjected to ultimate tension B. where the shearing stress is zero C. which are subjected to maximum compression D. which are 45° apart The answer is: B 149. The property of material wherein the content is continuously distributed through its entire mass. A. plasticity B. malleability C. homogeneity D. all of these The answer is: C 150. The properties of metals to withstand load without breaking down is: A. elasticity B. strength C. plasticity D. strain The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 25 151. Shafts readily available in the market are made in many ways and wide variety of material composition. It is likely be cold drawn carbon steel in size smaller than _____ inches diameter. A. 3.75 B. 4 C. 5 D. 5 1/2 The answer is: A 152. Plain carbon steel standard designation, SAE ______. A. 6XXX B. 13XX C. 10XX D. 2XXX The answer is: C 153. The rigidity of polymer can be increased by: A. furnace melting B. normalizing C. crystallization D. shot peening The answer is: C 154. The difference between cast steel and cast iron A. all of these B. cast steel has usually less than 1% C while cast iron has 2% or 3.6% carbon range C. cast iron has lower strength more brittle and has lower ductility than cast steel D. iron is usually the initial product after purifying iron ore then further processing by removal of more impurities and carbon content to be able to produce steel grade. The answer is: C 155. It is a general practice to use the following allowable stresses, 4000 psi for main transmitting shaft and 8500 psi for small shaft, short shafts and countershafts. For line shaft carrying pulley it is _____ psi. A. 7800 B. 7000  C. 6000 D. 6500 The answer is: C 156. Drilling machine cannot do: A. reaming B. spot facing C. tapping D. broaching The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 26 157. Material changes in foundry melting operation are composed of: A. limestone, foundry coke and silica sand B. iron ore, quartz and charcoal C. steel scrap, alloys and charcoal/foundry coke D. scrap wood, alloys and limestone The answer is: A 158. ______ is a work supporting device which is bolted to the saddle of the lathe machine. It travels with the cutting tool. It is a prevention of the springing away of the workpiece from cutting tools. A. rubber-flex collets B. tool post C. follower rest D. carriage stop The answer is: D 159. Almost always the soldering materials are a combination of the following alloys: A. all of these B. lead and tin C. tin and antimony D. lead and antimony The answer is: B 160. The most popular of all soldering materials in use has composition of: A. 45/55% tin and lead B. 50/50% tin and lead C. all of these D. 60/40% tin and lead The answer is: B 161. The relative strength of a butt welding could be safely assumed as ____% efficiency. A. 95 B. 98 C. 90 D. 92 The answer is: C 162. Which of the following raw materials are used in the foundry moulding operation? A. silica sand, bentonite, flour/paste water B. silica sand and paste C. silica sand, paste, graphite electrode D. silica sand, linseed oil, flour The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 27 163. The following are parts of a micrometer caliper except for: A. thimble B. head screw C. spindle D. anvil The answer is: B 164. To avoid brittleness of weld or the residual stress in the welding it is normally stress relieved of ____. A. normalizing B. tempering C. flame hardening D. annealing The answer is: B 165. Steel with certain % carbon maximum can readily be welded by all process and the resulting strength of the portion welded is as strong as the base material. A. 0.15% C max B. 0.35% C max C. 0.25% C max D. 0.30% C max The answer is: D 166. Commonly used by steel melter as deoxidizer because of its easy availability and cheap price. A. silicon B. Aluminum C. Zinc D. manganese The answer is: B 167. Curved formed by the path of a point on a straight line as it rolls along a convex base curve. The base curve is usually a circle and generally used as the profile of gear tooth. A. axial plane B. involute C. arc of recess  D. arc of action The answer is: B 168. Several forces which can be combined is called: A. resultants B. composition of forces C. components D. collinear forces The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 28 169. Ideal herringbone gear helix is in the range of _____. A. 30 to 45 B. 35 to 50 C. 25 to 30 D. 15 to 20 The answer is: A 170. The distance from a point on a screw thread to a corresponding point on the next thread measure along the axis. A. flank B. lead C. crest D. pitch The answer is: D 171. As recommended the center to center distance between sprockets should not be less than ____ times the bigger sprocket. A. 2.26 B. 1 ¾ C. 1 ½ D. 2.59 The answer is: C 172. Machine shop instrument for checking the flatness of plane surfaces to 10ths of thousands of a centimeter. A. blade type micrometer B. dial caliper C. planimeter D. micrometer The answer is: C 173. Tools usually used in wood pattern making in a foundry shop. A. saws and chisels B. band saw C. knives and drills  D. drill machine The answer is: A 174. Recommended design practice for steel lineshafting to limit the linear deflection to inch/foot of length (maximum). A. 0.020 B. 0.010 C. 0.012 D. 0.150 The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 29 175. Big chain sprocket wheels are designed with spokes/arms are generally elliptical in cross section with major axis ____ times the minor axis. A. 2 B. 2 ½ C. 1 ½ D. 3 The answer is: A 176. Molybdenum steel standard designation, SAE ________. A. 88xx B. 48xx C. 40xx D. 46xx The answer is: C 177. For acceptable ideal range of tightness which may result from the application of specific combination of allowances and tolerances. A. allowance limit B. tolerance limit C. interference D. fit The answer is: D 178. A radian is equal to _____. A. 57.020o B. 57.706o C. 57.296o D. 57.190o The answer is: C 179. The absolute viscosity of the fluid divided by its density expressed in the same terms of units is also called _____. A. centistokes B. kinematics viscosity  C. Petroff’s equation D. light petroleum oil The answer is: B 180. Designated pipe color used in communication. A. green B. light blue C. white D. light orange The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 30 181. Stress relieving is also ______ for the purpose of reducing the internal stress of steel material/metal. A. quenching B. normalizing C. tempering D. drawing The answer is: A 182. Martensite (stainless steel) contains 4 to 26% Cr and a maximum of ____%. A. 1.5 B. 3.5 C. 2.5 D. 4.5 The answer is: C 183. Progressive change in position of a body is called: A. acceleration B. motion C. force D. momentum The answer is: B 184. It improves red hardness of steel: A. silicon B. lead C. cobalt D. manganese The answer is: C 185. It is required that pipes bigger than ____ mm should not be screwed but flanged. A. 76.2 B. 63.5 C. 2 1/4 inch D. 68.5 The answer is: B 186. Formed by the interaction of the adjacent flanks of adjacent threads when extended is called. A. crest apex B. all of these C. sharp root D. sharp crest The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 31 187. In designing the spoke or wheel arm of the flywheel, it is ideal to consider that the cross-sectional area of the spoke at the rim side should not be less than ____ of the cross area at the hub side. A. 80% B. 2/3 C. 90% D. 3/8 The answer is: B 188. The cutting up to 70o is best for drilling extremely hard metals and for soft materials ____ degrees may be applied. A. 60 B. 45 C. 40 D. 48 The answer is: C 189. Single forces which produces the same effect upon a mass replacing two or more forces acting together is called: A. vector B. resultant C. component of forces D. resolution The answer is: B 190. ________ is the process necessary to reduce the brittleness in alloy steel. A. martempering B. carburizing C. normalizing D. tempering The answer is: D 191. The welded joints permit placing the added metal exactly where needed and produce an integral structure which can develop _____% efficiency on any thickness section especially for mild steel materials.  A. 95% B. 85% C. 100% D. 90% The answer is: C 192. The lack of backlash in a spur gear design/operation ma result to _____. A. overloading B. jamming C. all of these D. overheating The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 32 193. ______ forces mean when their lines of action can be extended to meet to one point. A. concurrent B. centroids C. collinear D. resultants The answer is: A 194. Imaginary formed by the intersection of the flanks of a thread when extended is called ____. A. sharp crest B. sharp root C. root apex D. all of these The answer is: A 195. Permissible variation of the manufactured or machined dimensions is called: A. intolerance fits B. deviation C. allowable D. tolerance The answer is: D 196. Molybdenum-chromium-nickel steel designation: A. SAE 48xx B. SAE 43xx C. SAE 56xx D. SAE 46xx The answer is: B 197. _____ is also called strain hardening. A. work hardening B. quenching C. annealing D. normalizing The answer is: A 198. A major alloy in tool steel. A. Cr B. FeN C. Cobalt D. Mn The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 33 199. Distance measured perpendicular to the axis between the crest of the thread and the root of its mating thread in a thread assembly of screws. A. tolerance class B. crest truncation C. crest clearance D. tolerance limit The answer is: C 200. Bearing surface that completely surrounds the journal is also called _____. A. offset bearing B. full bearing C. centrally loaded bearing D. babbitt learning The answer is: B 201. The width of a tooth space exceeds the thickness of each of the engaging tooth on the pitch circle ______. A. allowance B. bottom land C. top land D. backlash The answer is: D 202. ______ addition imparts resistance to atmospheric corrosion in steel, etc. A. aluminum bronze B. Manganese C. Copper D. bronze The answer is: C 203. Should two equal and opposite collinear forces be added to the forces already in equilibrium, which of the  following statement is true? A. Unbalanced of moment is maintained. B. Equilibrium is disturbed. C. Equilibrium is maintained. D. It increases an unbalanced situation. The answer is: C 204. Iron based alloy containing 9-16% chromium. A. Mn Hadfield steel B. chrome-alloy steel C. stainless steel D. high chrome steel The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 34 205. A rule of thumb, the speed limit of flywheel rim speed should be 6000 fpm for cast iron material and for cast steel flywheel rim at _____ meters/min. A. 3050 B. 4500 C. 7000 D. 10000 The answer is: A 206. The distance between rivet centers nearest each other in adjacent rows is called _____. A. pitch B. back pitch C. margin D. diagonal pitch The answer is: A 207. The purpose of lubrication is as mentioned, EXCEPT: A. to lighten the load B. prevent corrosion/adhesion C. prevent adhesion D. cool the moving elements The answer is: C 208. The process of peening the joint portion immediately after the welding greatly improves the fusion structures, avoids possible cracking, avoids possible distortion, etc. Peening is also called _____ process at the same time. A. tempering B. martempering C. normalizing D. annealing The answer is: D 209. Resultant of two or more component forces is called _____. A. component forces B. resultant C. component D. collinear forces The answer is: B 210. For stable equipment foundation, the total combined engine, driven equipment and foundation center of gravity must be kept below the foundations top that usually about ____ times the usual total combined weight of the machine it is supposed to support. A. 3 to 4 B. 3 to 7 C. 2 to 4 D. 3 to 5 The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 35 211. All associated with standard materials specification, EXCEPT: A. American Iron and Steel Institute B. Southeast Asia Iron and Steel Institute C. Society of Automotive Engineers D. American Society for Testing Materials The answer is: B 212. It is ideal for maximum quietness in sprocket drive operation to choose ___ or more teeth. A. 24 B. 18 C. 27 D. 21 The answer is: C 213. Shafting up to 3 inches in diameter is usually made from cold rolled steel and the common biggest diameter of cold rolled steel is ______. A. 4 1/4 inches B. 6 7/8 inches C. 6 3/4 inches D. 5 inches The answer is: D 214. Designated pipe color used in communication: A. silver gray B. aluminum gray C. bare D. white The answer is: D 215. Not part and in fact should not be used in the steel melting process.  A. coke B. silicon C. zinc D. aluminum The answer is: A 216. It is rigid piece which serves to transmit force from a piece to another piece or to cause/control motion. A. follower B. crank C. motion D. link The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 36 217. Type of bolt commonly used in the construction that is threaded in both ends. A. stud bolt B. acme thread C. hex bolt D. square threaded bolts The answer is: A 218. The normal helix angles in helical gears is recommended in the range of ____ degrees. A. less than 18 B. 20 to 35 C. 15 to 25 D. 20 to 30 The answer is: C 219. The ratio of stress acting on an elastic substance to the decrease in volume per unit volume. A. Bulk modulus B. Modulus of resilience C. elastic limit D. modulus of elasticity The answer is: A 220. Rule of thumb in calculating the equipment foundation mass should be _____ times the weight of the machinery it is supposed to support. A. 3-5 B. 3-6 C. 3-9 D. 2-4 The answer is: A 221. The welding made along the edges of two parallel plates is called _____.  A. groove joint B. fillet joint C. edge joint D. corner joint The answer is: C 222. Class of material exhibiting decreased electrical conductivity with increasing temperature. A. aluminum B. p-type semiconductors C. metals D. n-type semiconductors The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 37 223. Cast iron flywheels are commonly designed with a factor of safety of: A. 10 to 13 B. 10 to 12 C. 10 to 14 D. 8 to 13 The answer is: A 224. Stress relieving is also ______ for the purpose of reducing the internal stresses of steel material/metal. A. tempering B. normalizing C. all of these D. annealing The answer is: B 225. A ridge of uniform section in the form of a helix cut around the circumference of a cylinder and advancing along the axis. A. thread roots B. helix thread C. screw threads D. chamfers The answer is: C 226. Martensite (stainless steel) contains 4 to 26% Cr and a maximum of _____% nickel. A. 2.5 B. 3.25 C. 3.5 D. 2.0 The answer is: A 227. The design stress and factor of safety are related in the following manner:  A. design stress = ultimate stress/factor of safety B. ultimate stress = factor of safety/design C. design stress = factor of safety/times stress concentration factor D. none of these The answer is: A 228. The material that can cut/wear substances subjected to: A. carbide B. abrasive C. tungsten D. vanadium The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 38 229. A resulting factor that replace two or more forces acting together. A. vector B. couple C. resultant D. equilibrant The answer is: C 230. Peculiar strength of the metal to resist being crushed. A. shear strength B. ultimate strength C. compressive strength D. elastic limit The answer is: C 231. Which of the following is not a viscoelastic material? A. Teflon B. plastic C. all of these D. metal The answer is: D 232. Alloy steel used in manufacturing bolts, studs, and tubing subjected to torsional stresses. A. AISI 3141 B. AISI 2330 C. AISI 4830 D. AISI 4310 The answer is: B 233. Method of finishing/shaping a machine part of exceptionally high carbon or high chromium steel parts (or very hand material).  A. using oxygen lancing B. machining using carbide insert C. using abrasive grinding D. machining high speed tool steel The answer is: D 234. In a chain drive design for large speed reduction it is preferable to use a double reduction or compound type of transmission instead of single two sprockets transmission. Drives should be so designed that the angle between two tight chain strands does not exceed _____ degrees. A. 45 B. 60 C. 55 D. 90 The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 39 235. Steel springs are made of high carbon steel, heat treated and/or cold work to a high elastic limit to get good elastic deflection. In general, the carbon content is at ______. A. 0.40% or more B. 0.65% or more C. 0.50% or more D. 0.66% or more The answer is: C 236. The surface along the fillet curves or between the fillet radius of the two adjacent teeth of a gear. A. bottom land B. flank C. fillet D. top land The answer is: A 237. Not adaptable to welding due to low tensile strength and poor ductility, etc. A. copper parts B. cast iron materials C. aluminum parts D. bronze parts The answer is: C 238. Plus or minus tolerance can also be called as _____. A. total tolerance B. unilateral tolerance C. bilateral tolerance D. allowance The answer is: C 239. The total machinery weight plus the foundation weight should be well distributed in the corresponding soil  area which is enough to cause a bearing stress within the safe bearing capacity of the soil with a factor of safety of ______. A. 4.5 B. 3 C. 4.2 D. 5.0 The answer is: D 240. ______ is the plane perpendicular to the axial plane and to the pitch plane. In gears the parallel axes, and the plane of rotation coincide. A. tangent plane B. straight plane C. transverse D. reference The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 40 241. The conical surface at the starting end of the thread is called ____. Pitch cone chamfer crest flute The answer is: B 242. It is a good design practice for steel lineshafting to consider a limit to the linear deflection of ______ inch/foot length maximum. A. 0.050 B. 0.010 C. 0.020 D. 0.060 The answer is: B 243. The five principal parts of a shaper are, the table, tool, slide, base, ram and ______. A. column B. vise C. drive motor D. apron The answer is: A 244. In designing gears for power transmission consider an efficiency of ______ as recommended. A. 96% or more B. 89% or more C. 85% or more D. 98% or more The answer is: D 245. Progressive change of position of a body is called:  A. acceleration B. momentum C. motion D. force The answer is: C 246. The ideal thickness of the cutter at the pitch line for cutting helical gears should be _____ of the normal circular pitch. A. 3/8 B. ¾ C. ½ D. 5/1 The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 41 247. In drilling soft materials use cutting angle as low as 40 degrees but for extremely hard material up to ______ degrees is recommended. A. 80 B. 55 C. 75 D. 70 The answer is: D 248. The surface of the gear between the fillets of adjacent teeth is called____. A. bottom land B. flank C. topland D. flank of tooth The answer is: A 249. An act of cutting out a piece of metal at a desired shape and size: A. broaching B. blanking C. slitting D. dinking The answer is: B 250. A research agency handling assistance to all foundry, machine shop and metallurgical plant operation. A. MIRDC B. All of these C. DOST D. BOI The answer is: A 251. The soldering material commonly applied for automobile radiator cores and roofing seams.  A. 15/85% tin and lead B. 50/50% tin and lead C. 45/55% tin and lead D. 20/80% tin and lead The answer is: C 252. A carbon content in the range of ____ in steel readily responds to heat treatment. A. 0.35 to 0.40%C B. 0.28 to 0.30%C C. 0.18 to 0.25%C D. 0.12 to 0.15%C The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 42 253. Web is part of a drill and is usually thicker: A. beside the land B. nearing the shank C. close to the flute D. at the tip portion The answer is: B 254. It is a symbol that the work surface should be machined-finished and usually indicated in the drawing and placed on the line that represents the surface to be machined. A. f B. 15 C. 20 D. FAQ The answer is: A 255. Safety features that must be placed and maintained at Machine, Blacksmith, Welding and foundry Shops. A. walkaway guide B. all of these C. safety notices in markers/boards D. safety goggles The answer is: C 256. Deflection of a beam is: A. proportional to the modulus of elasticity and moment of inertia B. proportional to the load imposed and inversely to the length squared C. inversely proportional to the modulus of elasticity and moment of inertia D. inversely proportional to the weight-imposed times the length. The answer is: C 257. To teach professional subjects in mechanical engineering course, he must be a duly licensed ______ or a  Master’s degree or Doctorate degree holder in Mechanical Engineering. A. ME and CPM B. CPM C. PME D. ME The answer is: C 258. The amount by which the dedendum in a given gear/pinion exceeds the addendum of its mating pinion/gear. Also the radial distance between the top of a tooth and the bottom of the mating tooth space. A. tip relief B. top land C. clearance D. space The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 43 259. Axially located rectangular groove in a hub and shaft. A. keyseat B. cotter pin seat C. flute D. set screw point The answer is: A 260. ______ indicates how many times a volume of material is heavier than an equal volume of water. A. specific gravity B. specific volume C. specific weight D. specific density The answer is: A 261. Commonly used/produced screws/ bolts/nuts/ and for engineering applications is a series. A. UNC B. ANSI C. withworth D. UNF The answer is: A 262. Avoidance of vibration in equipment or machinery foundations, a mass of weight equal to ______ times the forces needed. A. 10 to 20 B. 8 to 15 C. 15 to 20 D. 8 to 10 The answer is: A 263. ______________ is the name applied to reciprocating circular motion as that of a  pendulum. A. intermittent motion B. reciprocating motion C. momentum D. oscillation The answer is: D 264. Nickel-chromium-molybdenum steel designation, SAE _____. A. SAE51xx B. SAE74xx C. SAE49xx D. SAE64xx The answer is: C This file is strictly for viewing only. Contents are not allowed to be edited. Page 44 265. Moment of inertia is also called: A. modulus of elasticity B. weep strength C. none of these D. radius of gyration The answer is: C 266. It is hardening treating whereby a cast metal is being heated to a very high temperature then suddenly subjected to rapid cooling to improve hardenability or wear resistance is called: A. annealing B. normalizing C. tempering D. quenching The answer is: D 267. Surface connecting the crest and roots of the screw thread A. lead angle B. length of engagement C. top land D. flank The answer is: D 268. A good general-purpose deoxidizer and promotes fine grain in steel. A. copper B. magnesium C. molybdenum D. silicon The answer is: D 269. Treatment process that produces a residual compressive stress at the surface (which occupy more volume)  and residual tension on the inside that results in considerable increase in fatigue strength for members on torsional/bending. A. heavy oil quenching B. partial quenching C. quenching D. shallow quenching The answer is: D 270. The flux that should be avoided in soldering electrical connection or commutator wires as it tends to corrode the connections. A. sal ammoniac B. zinc chloride C. stearin D. acid fluxes The answer is: D This file is strictly for viewing only. Contents are not allowed to be edited. Page 45 271. The characteristic of tool steel to sustain shocks and major impacts is due to its: A. toughness B. stiffness C. ductility D. machinability The answer is: A 272. Bevel gears subjected to corrosion and lightly loaded are usually made of _____. A. bronze B. brass C. all of these D. duralumin The answer is: C 273. As a rule of thumb, the depth of foundation could be about 3.2 to ____ times the engine stroke. A. 4.20 B. 4.0 C. 3.40 D. 3.80 The answer is: A 274. The application of electrical current to the corrosion circuit to counter the corrosion reaction is called: A. cathodic protection B. sacrificial anodes method C. chemical corrosion process D. galvanic action The answer is: A 275. A major component of cast steel A. silicon  B. iron C. manganese D. chromium The answer is: B 276. Normally cast iron contains 2% carbon or more and silicon in the range of ____%. A. 1 – 3 B. 2 to 4 C. 2 – 3 D. 1 to 6 The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 46 277. If a set of spur gears are made, installed and lubricated properly, they normally may be subjected to failures like: A. tooth spalling B. tooth pending C. pitting D. shearing The answer is: C 278. From experience specify the conventional limit of flywheel operations to be at 6000 ft/min for cast iron and ____ ft/min for cast steel. A. 7000 B. 8000 C. 10000 D. 12000 The answer is: D 279. What equation to use in computing the acceleration of the center of a rolling ball with a diameter of 8 inches. A. 0 B. rw2 C. w2/r D. V2/r The answer is: B 280. In a cutting tool the cutting end can also be generally called ___. A. end cutting edge B. nose C. back rake D. side rake The answer is: B 281. What factors can modify the recommended cutting speed of known work piece? A. rough cutting of work piece B. modify the shape of the cutting tools C. use correctly shaped cutting tools D. depth of cut The answer is: D 282. The material for engine radiator is usually made of ______. A. yellow brass B. silicon brass C. admiralty brass D. navy brass The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 47 283. What type of leather belting should be used at an ambient temperature above 140° and possible acid liquid coming in contact with the belt? A. mineral tanned B. combination of oak C. none of these D. Oak tanned The answer is: C 284. A machine shop equipment that can flatten horizontally, vertically or angular plane. A. shaper machine B. welding machine C. drill machine D. power saw The answer is: A 285. A petroleum by-product used as electrodes in an electric arc furnace melting operation. A. anthracite coke B. foundry coke C. graphite electrodes D. bituminous coke The answer is: C 286. An example of rectilinear translation: A. locomotive wheels B. rack gear C. piston of an engine D. jack The answer is: C 287. __________ does not affect the tensile strength of steel.  A. Sulphur B. cobalt C. phosphorous D. baron The answer is: D 288. Which of the following is an unsafe condition in operating a lathe machine? A. wearing denim pants/safety shoes B. wearing a canvas apron C. operating with safety gloves D. wearing safety goggles/hearing aid The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 48 289. Relief angles of single-point cutting test in cutting mild steel, cast iron and other average work as recommend should be in the ranges of _____ degrees for high speed tools. A. 8 to 12 B. 10 to 15 C. 5 to 7 D. 12 to 16 The answer is: A 290. Tap not used for cutting threads____. A. tapping tap B. bottoming tap C. plugging tap D. taper tip The answer is: A 291. Alloy steel axle under repeated load/ stress will eventually fail if the load/stress is above the endurance for the steel under consideration. The endurance limit of the steel is therefore: A. equal to the allowable stress at the module of elasticity B. equal to half the ultimate strength C. equal to the module of elasticity D. equal to 80% of the elastic limit The answer is: B 292. All terms and abbreviations deal with wire rope arrangement except this ____ which deals with wire rope material strength. A. preformed B. IWRC C. Mps D. lang lay The answer is: C 293. Mirror finish has surfaces fineness of ____ rms. A. 1 B. 2 to 8 C. 1 to 3 D. 2 to 5 The answer is: A 294. Chromium steel (to include heat and corrosion resistant) designation. A. SAE 56xx B. SAE514xx C. SAE61xx D. SAE9xxx The answer is: B This file is strictly for viewing only. Contents are not allowed to be edited. Page 49 295. Non-metallic material for high melting temperature being used as furnace lining. A. quartz bricks B. refractories C. silica sand D. dolomite clay bricks The answer is: B 296. For economical cost in the manufacturing large worm gears the following materials are usually applied. A. bronze rim with cast steel spider B. cast iron rim with bronze spider C. cast steel rim with brass spider D. alloyed aluminum rim with cast iron spider The answer is: A 297. In greater quantity, this element is harmful to the molten ferrous metal. A. silicon B. aluminum C. oxides D. sulfur The answer is: D 298. ____ thread is used where the thread requires great strength and usually cut square on one side and slanting on the other side. A. janno B. buttress C. square D. double The answer is: B 299. Internal stress exerted by the fibers to resist the action of outside force is called___. A. shearing stress B. tensile stress C. ultimate stress D. compressive stress The answer is: A 300. One of the following materials is not mentioned for wire rope pulley/sheave applications. A. plastic B. iron C. paper D. copper alloy The answer is: A This file is strictly for viewing only. Contents are not allowed to be edited. Page 50