Workshop Practices & Gen Engineering Objective (1) PDF Past Paper

Workshop Practices and General Engineering (Objective Type Questions) (According to the Syllabus Prescribed by Director General of Civil Aviation, Govt. of India for BAMEL, Paper-II)  FIRST EDITION WORKSHOP PRACTICES &...

Workshop Practices and General Engineering (Objective Type Questions) (According to the Syllabus Prescribed by Director General of Civil Aviation, Govt. of India for BAMEL, Paper-II)  FIRST EDITION WORKSHOP PRACTICES & GENERAL ENGINEERING (Objective Type Questions) Prepared for and by L.N.V.M. Society Group of Institutes * School of Aeronautics ( Approved by Director General of Civil Aviation, Govt. of India) * School of Engineering & Technology ( Approved by Director General of Civil Aviation, Govt. of India) * School of Aeronautics (Neemrana) Compiled by Mr. Rajesh Saluja Published By L.N.V.M. Society Group of Institutes H-974, Palam Extn., Part-1, Sec-7, Dwarka, New Delhi-77 Published By L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 First Edition 2008 All rights reserved; no part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written permission of the publishers. Type Setting Chanchal Dhariwal Cover Designed by Abdul Aziz Printed at Graphic Syndicate, Naraina, New Delhi  Dedicated To Shri. Laxmi Narain Verma [ Who Lived An Honest Life ] Preface This book of Workshop Practices (Objective type Questions) is an outcome of the hard work, knowledge and dedication of the Instructors of this subject. This book is highly beneficial to the students of the Aircraft Maintenance Engineering (A.M.E.) appearing in BAMEL Paper-II of Director General of Civil Aviation. The book in your hand is the treasure of the valuable questions on the various topics of Workshop Practices according to the syllabus prescribed by the DGCA for paper II. The first eight Chapters of this book contain the exhaustive questions on all the topics of Workshop practices and are discussed in the order as mentioned in the DGCA syllabus. The last three chapters contain the questions from the other topics of paper II such as Airframe, A/C Instrument Systems, A/C Electrical Systems, Aircraft Maintenance Practices etc. which all together add to the utility of this book, there chapters also includes questions from old DGCA licence exam Papers-II. The questions on various topics are prepared in such a manner that they clear the basic concepts of the topics to students as well as add the data of facts in their minds. These questions have been provided with the answers for the ready reference of the students. I am highly thankful to our director Mr. C.C. Ashoka for his able guidance and encouragement. I appreciate with heartly thanks for the efforts of all concerned, who contributed to compile this publication as an valuable offer to AME students. Utmost care has been taken, while preparing, typing the questions and marking their answers. We will highly welcome the suggestions, corrections and feed back our esteemed readers and will be incorporated in the next edition. Rajesh Kumar Saluja Dated : January, 2008 Senior Lecturer  CONTENTS 1. KNOWLEDGE OF MATERIAL, PARTS AND USE OF HAND TOOLS, SIMPLE MACHINE TOOLS AND PRECISION MEASURING INSTRUMENTS 1 2. DETAILED KNOWLEDGE OF IDENTIFICATION, TERMINOLOGY, CORRECT USE AND INSPECTION OFAIRCRAFT BOLTS, NUTS, RIVETS, SCREWSAND LOCKING DEVICES OF BRITISHAND AMERICAN SYSTEMS 76 3. DETAILED KNOWLEDGE OFTHE INTERPRETATION OF ENGINEERING DRAWINGS INCLUDING SYMBOLS 94 4. DETAILED KNOWLEDGE OF VARIOUS TYPES OF GEARS AND BEARINGS, THEIR USE AND COMMON DEFECTS 109 5. KNOWLEDGE OFVARIOUS FORMS OFTHREADS USED IN BRITISH AND AMERICAN SYSTEM AND VARIOUS TYPES OFTHREADS, DRILLS, TAPS REAMERS 118 6. KNOWLEDGE OF HARDNESS TESTING MACHINES AND VARIOUS TYPES OF HARDNESS NUMBERS 129 7. KNOWLEDGE OFVARIOUS TYPES OFAIRCRAFT CABLESAND SWAGING PROCEDURES USED 135 8. WELDINGAND ALLIED PROCESSES 141 9. IMPORTANT QUESTIONS FROM VARIOUS TOPICS 163 10. IMPORTANT QUESTIONS FROM PAPER-II POINT OFVIEW 281 11. MATCH THE FOLLOWING 479 L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 1 CHAPTER - 1 KNOWLEDGE OF MATERIAL, PARTS AND USE OF HAND TOOLS, SIMPLE MACHINE TOOLS AND PRECISION MEASURING INSTRUMENTS 1. Cast tool alloys have high-temperature strength and 9. Fig.1.1 shows a wear resistance. They are principally alloys of a. lathe tool a. nickel, cobalt and chromium b. carrier b. cobalt, chromium and tungsten * c. lathe dog * c. tungsten, chromium and molybdenum d. lathe centre d. columbium and zirconium e. lathe chuck e. cobalt, boron and aluminium 2. Tumbler gear is concerned with a. automobiles b. aeroplanes c. lathe * d. ships e. war vehicles Fig.1.1 3. A fly cutter is used on following machine tool 10. In which of the following machine tool, the motion is a. shaper applied to the workpiece b. lathe a. engine lathe c. broaching machine b. vertical borer d. gear cutting machine c. horizontal borer e. milling machine * d. shaper * e. planer 4. Power from the leadscrew to the carriage in lathe is transmitted through 11. In which of the following machine tool, the feed motion a. bevel gear b. worm and gear is applied to the tool c. tumbler gear d. half nut * a. horizontal miller e. full nut b. vertical knee type miller c. vertical bed type miller 5. Which of the following machines uses fly cutter d. shaper a. shaper b. planer e. broacher * c. broacher d. gear cutter e. milling machine * 12. The overall efficiency of engine lathe, borer and shaper is of the order of 70%. The overall efficiency of miller is 6. The best process for the mass manufacturing of steel of the order of balls is a. 85% b. 80% a. turning on a lathe c. 70% d. 50% * b. turning on a capstan or Turret Lathe e. 40% c. turning on an automatic lathe d. cold heading * 13. The overall efficiency of grinders is of the order of e. casting a. 100% b. 85% * c. 70% d. 60% 7. A tool used for removing broken bolts and studs from e. 50% a hole is known as a. Screw driver b. Punch 14. Discontinuous chips are produced when machining c. Ezy-out * d. Telescopic rod a. most ductile materials, such as wrought iron, e. Emry rod copper, etc. b. ductile materials at very low speeds and high 8. The cementite is feeds* a. iron carbide * c. with high friction between the chip and the tool b. a mixture of ferrite and iron-carbide d. mild steel c. a mixture of pearlite and iron-carbide e. none of the above d. alpha iron and iron carbide  2 General Engineering 15. The chips produced during orthogonal cutting 23. A reamer is used to correct the operation are a. size and roundness of a drilled hole * a. spiral * b. size and position of a drilled hole b. snarled c. finish and position of a drilled hole c. needles d. finish and depth of a drilled hole d. conical helical e. all of the above e. elemental 24. An oversize hole is produced by a drill if 16. The built up edge is formed in the slow speed a. lips of drill are of unequal length * machining of certain ductile materials. Speed of built b. feed is too high up edge can be reduced by c. insufficient coolant is used a. application of a lubricant d. cutting speed is too high b. increase in field e. drill is hot c. increase in initial hardness of the workpiece material d. decrease in the rake angle 25. State whether the following statements are true or false e. all of the above * a. The rates of fees and cutting for twist drill are lower than for most other machining operations 17. The metal cutting wedge is fundamental to the b. Like any other cutting tool the twist drill must be geometry of provided with correct tool angles a. hand tools c. A twist drill produces a hole of fine finish and b. power driven tools accurate size * c. lathe, shaper and planer tools d. No cutting fluids are used for carbide tipped milling d. grinding wheels cutters e. all cutting tools * e. Decreasing wedge angle of tool decreases its 18. The point angle of twist drill to drill holes in steel is mechanical strength a. 900 b. 1050 c. 118 * 0 d. 1350 26. Discontinuous chips are produced when machining e. 148 0 a. brittle materials at slow cutting speeds * b. Ductile materials with fine feed 19. Continuous chips are formed when cutting c. Mild steel with sharp cutting edge of tool a. brittle materials d. Mild steel with high cutting speed b. ductile materials * e. None of the above c. amorphous plastic materials d. free cutting non ferrous alloys only 27. Built up chips are produced when machining e. with high speed steel tools a. Ductile materials and high depth of cut b. Ductile materials with coarse feed 20. The rack angle of a cutting tool c. Mild steel with low rake angle a. controls the chip formation * d. All of the above * b. prevents ribbing e. None of the above c. determines the profile of tool d. determines whether the cutting action is oblique 28. Friction between chip and tool may be reduced by or orthogonal a. increased sliding velocity * e. increases tool life b. increased shear angle c. use of low tool finish 21. Which of the following processes is chip removing d. decreased sliding velocity process e. decreasing shear angle a. sintering b. extrusion 29. Pick up the true statement c. forging a. Selection of grinding wheel does not depend on d. rolling the work piece material e. broaching * b. Fine grain wheels are used to grind soft ductile materials 22. A twist drill has its point thinned in order to c. Hard and brittle materials and finishing cuts require a. reduce the hole diameter dense structure in grinding wheel * b. increase the rake angle d. Grade of grinding wheel is denoted by a number c. locate in the centre punch mark e. Structure of grinding wheel is denoted by alphabets d. reduce the axial (feed) pressure * e. increase the hole diameter L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 3 30. Pick up the false statement 35. Pick the odd one out a. Machinability index implies the degree of easiness a. Twist drill in machining b. Grinding wheel b. Free cutting steel cannot be easily machined * c. Parting tool in lathe * c. Heat resisting steels posses low machinability d. Milling cutter d. cast iron does not permit as high a cutting speed e. Reamer as structural carbon steel 36. Which is the material not grinded by silicon carbide e. Aluminium oxide abrasives are used for grinding abrasive high strength tensile materials and silicon carbide a. bronze for low tensile strength materials b. cast iron c. copper 31. Pick up the false statement d. steel * a. The most machinable metal is one which permits e. non-metallic materials fastest removal of largest amount of material per grind of the tool 37. The size of abrasive grains in abrasive je machining b. For the same amount of applied force orthogonal varies from cutting removes more metal * a. 60 to 100 microns b. 10 to 50 microns * c. For the same amount of metal removal the shear c. 1 to 5 microns d. 0.1 to 1 micron stress induced in orthogonal cutting is more than e. 0.01 to 1 micron in oblique cutting d. In oblique cutting the edge of the tool remains 38. The condition for the formation of continuous chips with built up edges inclined to the direction of the work feed a. low rake angle e. Magnesium alloys exhibit excellent machinability b. low cutting speed c. high feed 32. Pick up the false statement d. all of the above * a. A cutting fluid should have low conductivity * e. none of the above b. Use of cutting fluids promotes a better surface finish 39. A hard grade grinding wheel is suitable for grinding c. Solid lubricants normally used are graphite, a. Hard materials molybdenum disulphide, stick waxes etc. b. Soft materials * d. Air, CO2 and argon are used as gaseous cutting c. Both hard and soft materials fluid d. Tough materials e. Synthetic coolant is used for turning titanium e. Brittle materials 33. Pick out the true statement 40. Ceramics tools are sintered or hot-pressed from a. The structure of a grinding wheel indicates the aggregates which are basically a. tungsten carbide relative spacing of grains in the wheel * b. cobalt, chromium and tungsten b. The grade of a grinding wheel indicates the relative c. silicon carbide spacing of grains in the wheel d. aluminium oxide * c. The grade of a grinding wheel indicates the relative e. damond dust strength of the bond which hold the abrasive grains in place 41. Tick the odd one out d. For grinding softer materials fine grain size is used a. combination set b. bevel protractor e. Coolant is not required during super finishing c. sine bar d. straight edge * e. dividing head 34. Tick out the true statement a. In general the surface finish becomes poor with 42. Which of the following is not direct reading type increase in cutting speed measuring instrument b. An increase in back rake angle of a cutting tool a. telescoping gauge * b. micrometer deteriorates surface finish c. bevel protractor d. dial gauge c. Some degree of roughness which may be extremely e. vernier caliper small is always present on any machined surface * 43. Which of the following is not concerned with plane d. mild steel is the most commonly used material for surface measurement slide ways a. straight edge b. surface gauge e. Spindles of machine tool are generally made solid c. profilometer d. optical flat e. combination set *  4 General Engineering 44. Pick up false statement about various elements of drill 55. The shock resistance of steel is increased by adding a. a drill cuts only at the lip a. nickel b. the dead centre does no cutting, it merely rubs on b. chromium the work, creating friction, heat and inaccuracy c. nickel and chromium * c. flute is provided for the purpose of ejecting chips d. cobalt and molybdenum and most drills have three flutes * d. the margine supports the drill in the hole and helps 56. 18 / 8 steel contains to guide it a. 18% nickel and 8 % chromium e. body clearance gives strength to the drill b. 18% chromium and 8% nickel * c. 18% nickel and 8% vanadium 45. The property of a material which enables it to be drawn d. 18% vanadium and 8% nickel into wires with the application of tensile force, is called a. plasticity b. elasticity 57. The material generally used for air-craft components c. ductility * d. malleability is a. mild steel b. high speed steel 46. Which of the following material has the maximum c. stainless steel d. aluminium * ductility ? a. Mild steel * b. Copper 58. The choice of the right band saw blade for a particular c. Zinc d. Aluminium job is determined by the a. blade set 47. The plasticity is the property of a material which enables b. stradding speed it to c. type of material to be cut * a. regain its original shape after deformation when d. blade temper the external forces are removed. e. amount of material to be removed b. draw into wires by the application of a tensile force. c. resist fracture due to high impact loads. 59. Under what conditions do band saws cut best ? d. retain deformation produced under load a. high speed and light feed permanently. * b. high speed and heavy feed c. slow speed and light feed 48. The property of a material which enables it to resist d. slow speed and heavy feed * fracture due to high impact loads, is called toughness. e. none of the above a. True * b. False 60. Which of the following is/are affected by the number 49. Which of the following property is desirable in parts of teeth a saw blade has subjected to shock and impact loads ? a. rate of feed b. coarseness of cut a. Strength b. Stiffness c. size of cut d. all of the above * c. Brittleness d. Toughness * e. none of the above 50. A special case of ductility which permits materials to 61. The purpose of chasing dial on lathes is to achieve be rolled or hammered into thin sheets, is called a. taper turning a. plasticity b. elasticity b. cutting of tapered threads c. ductility d. malleability * c. cutting of multiple threads d. plunge cut 51. The toughness of a material..................... when it is e. picking up the thread accurately at the beginning heated. of each cut * a. increases b. decreases * c. does not change 62. A good lubricant for thread-cutting operation is a. graphite b. white lead 52. Which of the following property is essential for spring c. mineral lard oil * d. water soluble oil materials ? e. emulsified oil a. Stiffness b. Ductility c. Resilience * d. Plasticity 63. The power is transmitted by lead screw to the carriage through 53. The malleable material should be plastic but is not a. gear box b. worm and gear essential to be so strong. c. rack and pinion d. half nut * a. Agree * b. Disagree e. apron mechanism 54. The material commonly used for machine tool bodies 64. No lubricant is required when cutting threads in is a. tungsten carbide b. mild steel a. mild steel b. aluminium c. titanium d. brass or cast iron * c. brass d. cast iron * e. high speed steel L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 5 65. The following type of file is preferred for filing brass or 73. The common ratio  for spindle speeds in geometrical bronze progression is taken between a. the smooth-cut file a. 0.2 to 0.6 b. 0.6 to 1.0 b. the second-cut file c. 1.0 to 2.0 * d. 2.0 to 5.0 c. the coarse -cut or rough-cut file * e. 5.0 to 10.0 d. the double-cut file e. the single-cut file 74. The spindle speeds in a cutting tool are 160, 229, 328, 496...The next higher speed will be 66. To clean a file, it is a. 642 b. 660 a. dipped in water c. 671 * d. 695 b. dipped in dilute alcohol e. 709 c. rubbed on stone d. rubbed on wood 75. For machining a casting on a lathe, it should be held in e. cleaned with a file card * a. collet chuck b. magnetic chuck 67. A power saw which employs a continuous looped blade c. three-jaw chuck driven by two wheels is known as d. four-jaw chuck * a. a power hacksaw machine e. face plate b. a circular saw machine c. a filing machine 76. In automatic machine where large number of d. a band saw machine * components are machined from a bar, it is held in e. none of the above a. collect chuck * b. magnetic chuck 68. Average cutting speed in machining mild steel by single c. three-jaw chuck point tool of H.S.S. is d. three-jaw chuck a. 10 m/mt b. 20 m/mt e. face plate c. 30 m/mt * d. 40 m/mt e. 50 m/mt 77. Turret lathes in which long turning cuts are made by moving the saddle along the bedways of the machine 69. Tool life is said to be over if are called a. a poor surface finish is obtained a. drum type turret lathes b. sudden increases in power and cutting force with b. ram type turret lathes chattering take place c. saddle type turret lathes * c. overheating and furning due to friction start d. automatic screw machines d. all of the above * e. universal turret lathes e. it can no longer machine 78. The purpose of tumbler gears in lathe is to 70. Tool life is most affected by machine a. cut gears a. cutting speed * b. cut threads b. tool geometry c. reduce spindle speed c. feed and depth d. give desired direction of movement to the lathe d. microstructure of material being cut carriage * e. not using coolant and lubricant e. reverse spindle rotation 79. Turret lathes equipped with spindles which can be 71. The spindle speeds of machine tools are usually fitted with a universal 2-jaw chuck are referred to as designed to follow a. drum type machines a. arithmetical progression b. saddle type machines b. geometrical progression * c. chucking machines * c. harmonical progression d. universal lathes d. logarithmic progression e. swiss type lathes e. random number theory 80. On bar-type turret lathes, work to be machined is 72. The best machine for mass production of watch gripped in components machined from bar will be a. three-jaw chucks a. turret lathe b. four-jaw chucks b. capstan lathe c. pneumatic chucks c. tool room lathe d. collet * d. numerically controlled lathe e. magnetic chucks e. multi spindle automatic lathe *  6 General Engineering 81. Flank wear occurs mainly on 89. The metal in machining operation is removed by a. nose part, from relief face and side relief face * a. teraing chips b. nose part and top face b. distortion of metal c. cutting edges c. shearing the metal across a zone * d. all of the above d. cutting the metal across a zone e. front force e. pushing the metal with tool 82. In a capstan lathe, the turret is mounted on 90. Average cutting speed in machining cast iron by a a. a short slide of ram sliding on the saddle * single point cutting tool of H.S.S. is b. the saddle sliding on the bed a. 6 m/mt c. compound rest b. 11 m/mt d. back tool post c. 22 m/mt * e. head stock d. 33 m/mt e. 44 m/mt 83. Which of the following properties are essential for a tool material used for high speed machining 91. Galvanising is a. red hardness and impact resistance a. a zinc diffusion process b. red hardness and wear resistance b. an oxidising process used for aluminium and c. toughness and impact resistance magnesium articles d. impact resistance and wear resistance c. a process used for making thin phosphate coatings e. red hardness, wear resistance and toughness * on steel to act as a base or primer for enamels and paints 84. The characteristics that enables one material to cut d. is the process of coating of zinc by hot dipping * another is its relative e. none of the above a. toughness b. hardness * 92 The C.L.A. value is used for measurement of c. resilience a. metal hardness d. ductility b. surface roughness * e. creep and fatigue properties c. surface dimensions d. sharpness of tool edge 85. Most machinable metal is one which e. machinability a. produces discontinuous chips b. permits maximum metal removal per tool grind * 93. The front rake required to machine brass by H.S.S. c. results in minimum length of shear plane tool is d. results in minimum value of shear angle a. 150 b. 100 e. all of the above c. 5 0 d. 00 * e. -5 0 86. It is possible to correlate tool life with the following property of the metal 94. The best all-round coolant for carbide tools is a. grain size a. soluble oil in plenty * b. toughness b. kerosene c. hardness * c. turpentine oil d. microconstituent d. compressed air e. alloying elements e. soap water 87. Sanding is a process of removing metal surfaces or 95. Work which cannot be chucked because of its shape wood fibers by can be mounted on the following device for facing a. filing operation b. sawing a. collet b. vise c. cutting * c. V-block d. faceplate * d. planing e. universal head e. none of the above 96. A left hand tool on lathe cuts most efficiently when 88. Sanding belts are made of cloth, coated with various tool travels grades of a. from left to right end of lathe bed * a. sand b. from right to left end of the lathe bed b. gravel c. across bed c. copper oxide d. at angular position d. aluminium oxide * e. for cutting threads e. diamond L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 7 97. A right hand tool on lathe cuts most efficiency when 105. Chiesels for metal cutting are hardened tool travels a. at tip a. from left to right end of lathe bed b. all over * b. from right to left end of lathe bed * c. at the cutting edge c. across bed d. rarely d. at angular position e. at the top e. for cutting threads 106. The cutting angle of chisel for cutting mild steel is 98. Which one of the lathe parts mentioned below is not a. 300 b. 500 provided with a power feed ? c. 700 * d. 900 a. carriage e. 1100 b. compound rest * c. cross slide 107. If the diameter of a job being machined on lathe is d. feed screw doubled and speed is halved, the cutting time will be e. lead screw a. same b. half 99. Before hardness steel can cut, it must be c. double a. annealed d. four times * b. heat treated e. eight times c. forged d. hardened 108. Short or sharp angle tapers are machines using e. shaped into a cutting edge * a. a taper attachment b. the compound rest * 100. Anodising is c. the tailstock set over method a. a zinc diffusion process d. a form tool ground to the taper angle b. an oxidising process used for aluminium and e. morse taper attachment magnesium articles * c. a process used for making thin phosphate coatings 109. The taper on lathe spindle is on steel to act as a base or primer for enamels and a. 1 : 10 b. 1 : 12 paints c. 1 : 15 d. 1 : 20 * d. is the process of coating of zinc by hot dipping e. 1 : 24 e. none of the above 110. The angle between the lathe centres is 101. Undercutting is the operation of cutting a. 1 : 10 b. 1 : 12 a. below the specified size c. 1 : 15 d. 1 : 20 * b. a deep groove e. 1 : 24 c. a spiral d. a groove next to shoulder * 111. The movement of the various slides as well as the e. with high depth of cut feeding of the stock is entirely automatic on screw machines and is obtained by the action of 102. Which of the following taper turning methods can be a. gear b. collet used only for turning external taper c. roller d. spring a. form fool b. tailstock offset * e. cam * c. taper attachment d. compound rest e. all of the above 112. The slowest speed in lathe is adopted for following operation 103. The following gauge is used for checking of holes a. normal turning a. ring gauge b. thread turning * b. snap gauge c. turning big diameter c. plug gauge * d. taper turning d. dial gauge e. knurling e. micrometer screw gauge 113. Square or irregular shaped work piece for turning is 104. If a 250 taper is to be cut with small diameter towards usually mounted in tail stock the setting of taper turning attachment would a. three jaw chuck be b. independent chuck * a. + 250 b. - 250 c. collet chuck c. - 12.5 0 d. + 12.50 * d. bar chuck e. + 50 0 e. mandrel  8 General Engineering 114. The lathe spindle at the nose end has 124. In machining, chips break due to a. internal threads b. external threads * a. plasticity c. taper threads d. no threads b. ductility e. snap threads c. toughness d. work hardening * 115. A device which is fastened to the headstock end of e. tearing of the work material the work to be turned between centres is called a a. face plate b. lathe dog * 125. When machining a hard and brittle metal like cast iron, c. vise d. work steady the type of chips produced is e. independent chuck a. continuous chip b. discontinuous chip * 116. The included angle of lathe centre is c. continuous chip with built-up edge a. 300 b. 450 d. no chips are produced c. 60 * 0 d. 900 e. fine chips e. 1200 126. The following type of chip is produced when 117. The taper in lathe spindle is machining ductile materials a. 1 : 10 b. 1 : 12 a. continuous chip * c. 1 : 15 d. 1 : 20 * b. discontinuous chip e. 1 : 30 c. continuous chip with built-up edge d. no chips are produced 118. Tail stock centres which do not revolve with the work e. fine chips piece are known as a. non-revolving centres 127. The advantage of positive rake angles on cutters is b. dead centres * that these c. live centre a. use less power d. independent centres b. have less cutting pressure e. magnetic centres c. generate less heat d. work well on soft and ductile materials 119. The type of the chip produced when cutting cast iron e. all of the above * is a. continuous 128. The following cutting fluid is used with carbide tools b. discontinuous * a. kerosene oil c. with built up edge d. any one of the above depending on other factors b. lard oil e. none of the above c. water d. water with oil 120. Best coolant and lubricant for steel and wrought iron e. no cutting fluid * is a. water soluble oils or sulphur-based and mineral 129. The sector arm in indexing head is so adjusted that the oils * number of holes between the bevelled edges is equal b. mineral an fatty oils to c. soluble oils a. no. of holes to be indexed d. dry b. no. of holes to be indexed +1 * e. none of the above c. no. of holes to be indexed -1 d. no. of holes to be indexed +2 121. Crater wear occurs mainly due to following phenomena e. no. of holes to be indexed -2 a. abrasion b. diffusion * c. oxidation d. adhesion 130. How many degrees of the movement is produced by e. all of the above one complete turn of the index crank a. 3600 b. 900 122. Chips with built up edge can be expected when c. 450 d. 90 * machining e. 10 a. hard material b. brittle material c. tough material d. ductile material * 131. Crater wear takes place in a single point cutting tool at e. none of the above a. flank b. side rake 123. With H.S.S. tools, highest cutting speed is used while c. face * machining d. tip a. cast iron b. mild steel e. none of the above c. brass d. bronze e. aluminium * L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 9 132. Best cooling and lubricant for cast iron is 141. The increase in back rake angle would affect the surface a. water soluble oils or sulphur based and mineral finish as follows oils a. improve * b. mineral and fatty oils b. deteriorate c. soluble oils c. unchanged d. dry * d. improve/deteriorate depending on metal e. none of the above e. there is no such correlation 133. Which of the following tool materials has highest 142. Which of the following is used as cutting fluid for the cutting speed turning and milling operation on alloys steels a. carbon steel b. tool steel a. CO2 c. HSS d. cast alloy b. kerosene e. carbide * c. soluble oil d. heavy water 134. 18-4-1 high speed steel contains following elements in the ratio of 18-4-1 e. sulpurised mineral oil * a. tungsten (W), chromium (Cr) and vanadium (V) * b. Cr, V, W 143. Continuous chips will be formed when machining c. W, Mn, Cr speed is d. W, V, Cr a. high * e. W, Cr, Mn b. low c. medium 135. Approximately content of Vanadium in H.S.S. cutting d. irrespective of cutting speed tool material is e. away from the design value a. 16% b. 4% c. 0.1% d. 1% * 144. Which of the following is the chip removal process e. 8% a. rolling b. extruding c. die casting d. broaching * 136. Tungsten content in the High Speed Steel cutting tool e. forging material is a. 18% * b. 4% 145. Ceramic tools are made from c. 1% d. 0.6% a. tungsten oxide e. 16% b. silicon carbide c. cobalt 137. Chromium is H.S.S. cutting tool material is d. aluminium oxide * a. 1% b. 4% * e. diamond sand c. 18% d. 0.6% e. 16% 146. Discontinuous chips will be formed when machining speed is 138. The main function of the cutting fluid is a. provide lubrication a. high b. cool the tool and work piece * b. low * c. wash away the chips c. medium d. improve surface finish d. irrespective of cutting speed e. all of the above e. away from the design value 139. Friction between chip and tool can be reduced by 147. The heat generated in metal cutting can be a. increasing rake angle conveniently determined by b. increasing shear angle a. installing thermocouple on tool c. increasing depth of cut b. installing thermocouple on job d. increasing sliding velocity * c. using radiation pyrometer e. using coolant d. calorimetric set up * e. infra-red techniques 140. For the same amount of metal removal, the shear stress induced in orthogonal cutting as compared to oblique 148. Poor surface finish results due to cutting is a. heavy depth of cut a. more * b. low cutting speed b. less c. high cutting speed c. equal d. coarse feed * d. may be more or less depending on speed and e. low side rake angle cutting conditions e. there is no such correlation  10 General Engineering 149. Large jobs on shaper are held with the help of 157 Size of shaper is specified by a. vise a. length of strike * b. clamps and T-bolts b. size of table c. magnetic vise c. maximum size of tool d. clamps, bolts and squares * d. ratio of forward to return stroke e. on floor directly e. h.p. of motor 150. For proper seating of the work in a shaper vise for 158. A shaper employs following for quick return motion machining, the work should be supported on a. whitworth mechanism a. jaws b. crack and slotted link mechanism b. clamps c. hydraulic mechanism c. shims d. any one of the above * e. Leonard mechanism d. parallels * e. flats 159. To prolong the life of shaper tools after they are ground, they should be 151. Flat thin work is held on planer by a. lapped * b. sanded a. C-clamp and angle plate c. stoned d. hardened b. toe dogs and stops * e. heat treated c. clamping stops d. poppets and toe dogs 160. Which of the following work holding device is preferred e. magnetic vise for shaping a key-way in a cylindrical shaft a. a V-block * b. an angle plate 152. Cylindrical parts are held on planer by c. a dividing head d. a shaper vise a. V-blocks and arrestors e. any one of the above b. angle plates c. V-block, T-block and clamps * 161. Which of the following is not the part of a shaper d. T-bolt and clamps a. lapper box b. ram e. magnetic vise c. table d. tool head e. cross slide * 153. The feeding of the job in a shaper is done by a. movements of the clapper box 162. To shape spliness in a shaft which must be accurately b. table movement * spaced, the work is mounted in c. V-block a. a shaper vise d. ram movement b. between indexing centres * e. tool movement c. V-blocks d. a special fixture 154. In the case of a shaping machine, feeding of the job is e. an independent chuck done a. at the beginning of the cutting stroke 163. Which of the following is non-chip removal process b. at the middle of the cutting stroke a. spinning on lathe * c. at the end of the cutting stroke b. milling d. at the end of the return stroke * c. thread cutting e. any where d. gear hobbing e. grinding 155. In the case of a shaper equipped with whitworth mechanism 164. Size of planer is specified by a. the cutting stroke is faster than the return stroke a. size of table b. the return stroke is faster than the cutting stroke * b. stroke length c. both the cutting stroke and the return stroke take c. size of table and height of cross rail * the same time d. n. of tools which operate at a time d. the return stroke is slower than the cutting stroke e. h.p. of motor e. none of the above 165. Pick up the incorrect statement about plano-miller 156. The cutting speed of the tool in a mechanical shaper is a. feed is given by moving the table a. maximum at the beginning of the cutting stroke b. in comparison to planning machine the table b. maximum at the end of the cutting stroke movement is slower c. maximum at the middle of the cutting stroke * c. used for production of large surface d. minimum at the middle of the cutting stroke d. cutting can be done on three sides of the work at e. uniform throughout the cutting stroke the same time e. cutting can be done on one side only at a time * L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 11 166. Too low a feed rate in a milling operation would 174. Best coolant and lubricant for aluminium is a. consume less power a. water soluble oils or sulphur based and mineral b. improve surface finish oils c. cause the cutter to rub and scrap the surface of the b. mineral and fatty oils or soluble oils * work instead of cutting and dull the tool quickly * c. soluble oils d. be best suited while milling harder materials d. dry e. be best suited while milling softer materials e. none of the above 167. Feed rate in milling operation is equal to 175. Non-ferrous cast tool steel operates best at a. RPM a. cold temperature b. RPM  No. of teeth b. high temperature of 5000C c. RPM  Feed per tooth  No. of teeth * c. temperature has no effect RPM  Feed per tooth  No. of teeth d. elevated temperatures of 8250C and lose efficiency d. if operated at cold temperature * 2 e. none of the above e. none of the above 176. Carbide tool bits are ground by following type of 168. Depth of finishing cut on milling machine is of the grinding wheel order of a. aluminium oxide b. silicon carbide * a. 0.01 to 0.1 mm b. 0.01 to 0.3 mm c. diamond d. cobalt c. 0.4 to 0.8 mm * d. 0.8 to 1.2 mm e. high speed steel e. 1.2 to 2 mm 177. Powder metallurgy techniques are used in the 169. Light duty face mills are used in finishing operations production of and compared to heavy duty face mills, these have a. high carbon tool steels a. more no. of teeth b. HSS tools b. less no. of teeth * c. tungsten carbide tools c. same no. of teeth d. twist drills * d. there is no such criterion e. ceramics e. none of the above 178. Which of the following abrasive is the hardest 170. Addition of lead, sulphur and phosphorous to low a. Al2O3 (Aluminium Oxide) * carbon steels helps in achieving b. Si C (Silicon Carbide) a. better surface quality c. B4C (Boron Carbide) b. reduction of built up edge d. CBN (Cubic Boron Nitride) c. breaking up of chips e. diamond d. all of the above * e. none of the above 179. The hardness of carbon tool steels is increased when alloyed when alloyed with 171. The difference between planer and shaper is that in a. tungsten former case b. chromium and vanadium * a. tool moves over stationary work c. silicon b. tool moves over reciprocating work d. manganese c. tool can machine internal as well as external details e. sulphur d. both tool and job reciprocate e. tool is stationary and job reciprocates * 180. High speed steel tool material contains carbon a. 0.6-1.0% * b. 2-4% 172. The cut per tooth while broaching steel in a key way c. 4-6% d. 6-10% broach is of the order of e. 10-12% a. 0.01 to 0.05 mm b. 0.05 to 0.20 mm * c. 0.001 to 0.01 mm d. 0.02 to 0.08 mm 181. The binding material used in cemented carbide tools is e. 0.1 to 0.3 mm a. graphite b. lead c. cobalt * d. carbon 173. Internal and external threads can be produced on e. nickle tapered surfaces conveniently by a. universal milling machine 182. The cutting speed will be machining the following b. plano miller material with H.S.S. tool c. planetary milling machine * a. aluminium b. brass d. rotary table milling machine c. copper d. white metal e. lathe e. cast iron *  12 General Engineering 183. When the point of a twist drill is sharpened, the lips 192. The helical grooves which extend to the full length of must be ground so that they have the drill body are called a. equal dead centre a. lips b. cutting edges b. deep fluets c. margins d. fluets * c. wide web e. shanks d. proper point e. equal length and engine * 193. The angle formed by the leading edge of the land with a plane having the axis of the drill is known as 184. The hardest manufactured cutting tool material is a. helix angle or rake angle * a. diamond b. high speed steel b. point angle c. ceramic d. carbon steel c. lip-clearance angle e. cemented carbide * d. chisel edge angle e. primary angle 185. The type of chip produced when cutting ductile material is 194. The number of helical groves which are present in a a. continuous * standard twist drill is usually b. discontinuous a. one * b. two c. with built up edge c. three d. four d. any one of the above depending on other factors e. five e. none of the above 195. A standard ground drill has a point angle of 186. Depth of cut of finish grinding of steel in surface a. 900 b. 1000 grinder is of the order of c. 118 * 0 d. 1200 a. 0.001 to 0.005 mm e. 130 0 b. 0.005 to 0.01 mm * c. 0.01 to 0.5 mm 196. Goose neck tools are preferred on planers and slotters d. 0.5 to 0.1 mm because e. 0.1 to 0.5 mm a. digging in and scoring of the work is minimum * b. large clearance angle are possible 187. The point of a twist drill is thinned in order to c. friction between flank and machined surface is less a. decrease the rake angle d. tool is very rigid b. increase the rake angle e. back rake is appropriate c. reduce the hole diameter d. reduce the axial feed pressure * 197. For harder materials, the point angle of drill is e. locate in the centre punch mark a. increased * b. decreased 188. For drilling operation, the cylindrical job should always c. kept at 1180 be clamped on a d. point angle has nothing to do with type of material a. collet b. socket e. none of the above c. jaw d. vise e. V-block * 198. For ferrous materials, the helix angle of drill is taken as a. 300 * 189. Drilling is an example of b. 450 a. simple cutting b. uniform cutting * c. 600 c. orthogonal cutting d. oblique cutting d. 900 e. intermittent cutting e. none of the above 190. The cutting edges of a standard twist drill are called 199. The commonly used value of feed while machining a. flutes b. lips mild steel on shaper with HSS tool is of the order of c. wedges d. flanks * a. 0.1 mm b. 0.5 mm e. conical points c. 1.0 mm d. 1.5 mm * e. 3.0 mm 191. Trepanning is an operation of a. cutting internal threads 200. The cutting speed of high speed twist drill to machine b. producing a hole by removing metal along the grey cast iron is circumference of a hollow cutting tool * a. 10-20 m/mt c. making a cone-shaped enlargement of the end of a b. 25-40 m/mt * hole c. 50-80 m/mt d. super finishing d. 100-160 m/mt e. coating metal for wear resistance e. 180-240 m/mt L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 13 201. Optimum rake angle of a tool is a function of 211. The metal cutting wedge is fundamental to the a. cutting speed geometry of b. cutting tool material a. hand tools c. properties of work material * b. power driven tools d. cutting conditions, i.e. dry or lubricant c. lathe tools e. feed and depth of cut d. sheet metal cutting tools e. all of the above * 202. The back rake angle of HSS single point cutting tool for machining brass is 212. The tool life of a single point cutting tool with increase a. 100 b. -50 in back rake angle, with other parameters constant, c. 0 * 0 d. 50 will e. 70 a. increase slightly * b. decrease slightly 203. The recommended value of rake angle for machining c. remain unchanged aluminium with diamond tool is d. increase tremendously a. 00 * b. 50 e. decrease tremendously c. 150 d. 250 e. 350 213. Tool signature is a. there is nothing like tool signature 204. The angle between the face of tool, and the line tangent b. a numerical method of identification of tool * to the machined surface at the cutting point is known c. the plan of tool as d. the complete specification of tool a. rake angle b. lip angle e. none of the above c. clearance angle d. cutting angle * e. nose angle 214. Tool signatures comprise a. 4 elements 205. The angle between the tool face and the ground end b. 5 elements surface of flank is known a c. 6 elements a. lip angle * b. rake angle c. clearance angle d. cutting angle d. 7 elements * e. nose angle e. 8 elements 206. The recommended value of rake angle for machining 215. In metal cutting at speed above 20 rpm, maximum heat aluminium with high speed steel tool is is carried by a. 00 b. 50 a. work c. 15 0 d. 250 b. tool e. 35 * 0 c. chip * d. equally by all of the above 207. The angle between the face of the tool and the plane e. none of the above parallel to the base of the cutting tool is called a. rake angle * b. cutting angle 216. The cutting force with increase in nose radius of a c. clearance angle d. lip angle single point cutting tool will e. nose angle a. increase slightly b. decrease slightly * 208. The recommended value of rake angle for machining c. remain unchanged aluminium with cemented carbide tool is d. increase considerably a. 00 b. 50 e. decrease considerably c. 15 * 0 d. 250 e. 35 0 217. The rake angle of a cutting tool a. determines the profile of tool 209. The normal back rake angle of carbide single point b. prevents rubbing cutting tool for machining aluminium is of the order of c. decides the type of cutting action a. -50 to 00 b. 0 to 50 * d. controls the chip formation * c. 0 to 100 d. 10 to 150 e. weakness the tool e. 10 to 20 0 218. Which of the following is the example of oblique cutting 210. For softer material, the point angle of drill is a. slotting a. increased b. broaching b. decreased * c. knife turning c. kept at 1180 d. all of the above d. point angle has nothing to do with type of material e. none of the above * e. none of the above  14 General Engineering 219. Side rake angle of a single point tool is the angle 227. The portion of the tool on which cutting edge is formed a. by which the face of the tool is inclined sideways* is called b. by which the face of the tool is inclined towards a. flank b. side back c. face d. nose c. between the surface of the flank immediately below e. shank * the point and a line drawn from the point perpendicular to the base 228. The angle between the side cutting edge and the end d. between the surface of the flank immediately below cutting edge is known as the point and a plane at right angles to the centre a. nose angle * b. clearance angle line of the point of the tool c. side relief angle d. end cutting edge angle e. none of the above e. end relief angle 220. The recommended value of rake angle for machining 229. Lip angle of a single point tool is of the order of brittle materials like brass is a. 10-200 b. 30-450 a. -150 b. -50 c. 50-600 d. 60-800 * c. 0 *0 d. +100 e. 80-100 0 e. +20 0 230. A reamer is used to correct the 221. In orthogonal cutting system, the cutting edges is a. size and position of drilled hole a. in line with direction of tool travel b. size and roundness of hole * b. perpendicular to direction of tool travel * c. finish and position of drilled hole c. perpendicular to shear plane d. finish and size of a drilled hole d. perpendicular to direction of depth of cut e. finish and depth of a drilled hole e. none of the above 231. If 't' is the thickness of underformed chip in mm, "" is 222. Stellite is the trade name for the side cutting edge angle of the single point tool and a. ceramics 's' the feed in mm/rev, then b. ferrous cast alloys a. t = s sin  b. s = t sin  c. cemented carbide c. s = t cos  d. t = s tan  d. products manufactured by powder metallurgy e. t = s cos  techniques e. non-ferrous cast alloys * 232. The binding material used in cemented carbide tool is a. nickle b. cobalt * 223. No cutting fluid is normally used while machining c. aluminium d. chromium a. mild steel e. iron b. carbon steel c. stainless steel 233. Cemented carbide tools are poor in d. aluminium a. compression e. cast iron * b. tension c. shear 224. Pick up the incorrect statement about ceramic cutting d. compression and tension tools e. tension and shear * a. it is available in the form of tips b. it is made by cold pressing techniques 234. Cutting speed in machining with H.S.S. tool will be c. it consists of silicon * maximum when machining d. it consists of Al2O3 a. cast iron b. mild steel e. it cannot be reground c. aluminium * d. wrought iron e. tough steel 225. Throw away tips are used because a. initial cost is low * 235. Back rake angle of a single point tool is the angle b. tool changing is easier a. by which the face of the tool is inclined sideways c. regrinding is not required b. by which the face of the tool is inclined towards d. all of the above back * e. none of the above c. between the surfaces of the flank immediately below the point and a line drawn from the point 226. Back rake angle for HSS single point cutting tool is perpendicular to the base machine free cutting brass is d. between the surface of the flank immediately below a. 00 b. 50 the point and a plane at right angles to the centre c. 10 0 d. 150 * line of the point of the tool e. -15 0 e. none of the above L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 15 236. The cutting speed for machining cast iron with a HSS 243. The strength of a cutting tool depends on following tool is of the order of angle a. 30-50 m/mt * a. lip angle b. clearance angle b. 60-90 m/mt c. rake angle * d. cutting angle c. 100-150 m /mt e. all of the above d. 160-250 m/mt e. 250-400 m/mt 244. Chips are broken effectively due to following property a. stress 237. Which is the correct order for machinability of metals b. elasticity a. magnesium alloys, grey C.I., low carbon steel, monel c. toughness metal * d. work hardening of work material * b. grey cast iron, low carbon steel, magnesium alloys, e. ductility monel metal c. magnesium alloys, low carbon steel, grey C.I., monel 245. A burr is metal a. short piece of hardened chip d. magnesium alloys, grey C.I., monel metal, low b. burnt sand carbon steel c. rough surface on welded joint adhering to casting e. magnesium alloys, low carbon steel, monel metal, d. sharp edge remaining on metal after cutting, grey C.I. stamping or machining * e. built up edge on a cutting tool 238. The angle measured in the diametral plane between the face of the tooth and a radial line passing through 246. Cutting force and power involved in a machine tool the tooth cutting edge of a milling cutter is known as can be measured by using a. rake angle * a. pyrometer b. comparator b. primary clearance angle c. transducer d. dynamometer * c. relief angle e. gyroscope d. lip angle e. axial rake 247. An important parameter of specification of milling machine is 239. For particular cutting speed, the tool materials in order a. size of table b. spindle size of tool life are c. arbor size * d. horse power a. H.S.S. cemented carbides ceramics and oxides e. table movements b. ceramics and oxides, cemented carbides, H.S.S.* c. H.S.S. ceramics and oxides, cemented carbides 248. A milling machine in which the table can be swivelled d. cemented carbides, ceramics and oxides, H.S.S. and set at any angle to the column face is called a e. ceramics and oxides H.S.S., cemented carbides a. plain knee-and-column type milling machine 240. Tool cutting forces, with increase in cutting speed b. universal knee-and-column type milling machine * a. more or less remain constant c. bed-type milling machine b. increase linearly d. drum-type milling machine c. decrease linearly * e. planer-type milling machine d. unpredictable e. none of the above 249. The cutting tool in a milling machine is mounted on a. tool holder b. arbor * 241. The cutting speed for milling cast iron with HSS milling c. spindle d. column cutter is of the order of e. table a. 5-10 m/mt b. 10-16 m/mt * c. 20-30 m/mt d. 50-100 m/mt 250. The chip space between the back of one tooth and the e. 100-250 m/mt face of the next tooth in a milling cutter is called a. fillet b. land 242. End relief angle of a single point tool is the angle c. radiused edge d. gash * a. by which the face of the tool is inclined sideways e. tooth space b. by which the face of the face is inclined towards back 251. The operation of milling two sides of a work piece c. betweent the surfaces of the flank immediately simultaneously is called below the point and a line drawn from the point a. gang milling perpendicular to the base * b. climb milling d. between the surface of the flank immediately below c. square milling the point and a plane at right angles to the centre d. straddle milling * line of the point of the tool e. end milling e. none of the above  16 General Engineering 252. In order to avoid dulling of cutter, climb milling 260. Plain milling cutters, if used to mill steps of grooves, operation should never be used when millling parts would cause made of a. very good surface finish a. magnesium parts made of b. extreme rubbing * b. cast iron * c. dulling of the surface c. mild steel d. excessive power consumption d. non-ferrous materials e. correcting of centring e. stainless steel 261. Stagger tooth milling cutters in comparison to straight 253. Standard milling arbon size is tooth side mills a. 25.4 mm a. permit smoother cutting action b. 27 mm b. have alternate helical teeth c. 32 mm c. have more chip clearance d. 31.75 mm d. permit deeper cuts e. all of the above * e. all of the above * 254. Milling machine is classified as horizontal or vertical 262. A universal dividing head is used to perform a milling type, depending on the position of opeation by a. spindle * b. workpiece a. plain indexing b. direct indexing c. milling cutter d. work table or bed c. differential indexing * d. compound indexing e. knee e. complex indexing 255. Burnishing is an opeation of 263. Standard taper generally used on milling machine a. heat treatment spindles is b. deep boring a. Morse b. Brown and sharpe * c. gear finishing * c. Chapman d. Seller's d. surface treatment e. Metric e. producing gears 264. For sharpening milling cutters, the width of the land 256. To obtain fine finish cuts in milling can be reduced by grinding a. the cutting speed should be decreased and the a. primary clearance angle feed increased b. secondary clearance angle b. the cutting speed should be increased and the feed c. rake angle * decreased * d. suitable nose radius c. both the cutting speed and feed should be e. back face decreased d. both the cutting speed and feed should e increased 265. Dovetail milling cutter falls under the category of e. there is no such criterion a. a plain milling cutter b. a side milling cutter c. an end milling cutter * d. a shaping tool 257. The arbor of the milling machine is used to hold e. fly cutter a. cutting tool * b. spindle 266. A perfect square on the end of a round shaft can be c. over arm milled by mounting it on d. mandrel a. a differential b. a compound rest e. workpiece c. an index plate d. a dividing head * e. universal table 258. Very thin chips with end mills a. dull the cutting edge mills * 267. In helical milling, the ratio of the circumference of the b. improve tool life gear bank to the lead of the helix gives the c. sharpen the cutting edge a. angle setting of the machine table * d. cause chipping of the cutting edge b. proper speed to use e. cause tool breakage c. proper feed and depth of cut required d. no. of teeth to be cut 259. Plain milling cutters should be e. gear ratio for table screw and dividing head a. smaller than the width of the flat surface to be measured 268. The accurate spacing of teeth in a gear blank requires b. wider than the flat surface to be machined * the use of c. equal to width of flat surface to be machined a. a dividing head * b. an index plate d. there is no such criterion c. a gear tooth vernier d. a differential table e. none of the above e. universal table L.N.V.M. Society Group of Institutes, Palam Extn., Part-1, Sec.-7, Dwarka, New Delhi - 77 17 269. Helical gears can be cut on following type of milling 277. Power requirement, with increase in cutting speed machine a. more or less remains constant a. vertical b. horizontal b. increase linearly * c. universal * d. drum-type c. decreases linearly e. multi spindle d. unpredictable e. none of the above 270. Feed rate in milling operation is expressed as a. mm/tooth * 278. It is required to divide a surface into six equal parts b. mm/r.p.m. of the milling cutter using. Brown and Sharpe dividing head. Index handle c. meters/minute should be rotated by d. revolution per minute a. 6 turns e. mm 2 b. 6 turns * 3 271. Milling cutters are mounted on a part called the c. 1/6 turns a. bracket or brace b. arbor * 1 d. 6 turns c. shaft 3 d. dividing head e. none of the above e. tang 279. heavy speed shafts to be turned by carbide tools on 272. The angle between the face of the blade and a line centre