Machinist Period 1 Past Paper PDF

6/10/24, 7:54 PM ExamBank Login TRADES PRACTICE TESTS SIGN UP ACCOUNT ADMIN Machinist Period 1...

6/10/24, 7:54 PM ExamBank Login TRADES PRACTICE TESTS SIGN UP ACCOUNT ADMIN Machinist Period 1, 120 Questions Please wait until the exam has fully loaded in your web browser before starting. If you would like to go over your test offline, feel free to print this exam, then click on "Get Answer Key" at the bottom of the test and print the answer key that appears. If you would like the computer to mark your test for you, do not press "Submit Test For Online Marking" at the end of the exam until you are sure of your responses, as your test will be graded immediately. Good luck! Unit A: Safety And Measurement 1. When referring to lifting and hoisting procedures using a sling, what is a softener? A) It is a device used to increase the strength of the sling. B) It is a device used to protect the sling from shape edges of the load. C) It is a device that is used to increase flexibility of the sling. D) It is a device that is used to decrease the flexibility of the sling. 2. The lead of a screw thread is the axial distance a nut advances on a screw thread after how many complete turns? A) 10 B) 8 C) 5 D) 1 3. When a fibre rope is hitched, the strength of the rope is reduced by what percent? A) It is reduced by 15 percent. B) It is reduced by 25 percent. C) It is reduced by 50 percent. D) It is reduced by 75 percent. 4. What hacksaw pitch blade is used for cutting material with a small cross section such as high carbon steel drill rod? A) 32 B) 24 C) 18 D) 14 5. What are the products called that the WHMIS system is designed to provide safety for? A) Restricted. B) Controlled. C) Dangerous. D) Prohibited. 6. What is a worker's responsibility when dealing with WHMIS? A) To make sure appropriate control measures are in place to protect workers. B) To provide a safety data sheet to inspectors. C) To ensure that the hazardous products are properly classified as per the hazardous products regulations. D) To participate in controlling hazards. 7. The employer must provide a material safety data sheet for which type of product used in the shop? A) For each prohibited product used. B) For each controlled product used. C) For each restricted product used. D) For each measured product used. 8. What would you measure to find the minor diameter of an external thread? https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 1/14 6/10/24, 7:54 PM ExamBank Login A) You would measure at the point where the thickness of the thread is the same as the space between the threads. B) You would measure across the roots of the thread. C) You would measure the top of the thread. D) You would measure across the deepest point of the thread. 9. Which of the following fire class symbols will have a blue colour? A) B) C) D) 10. What is the part of a hand-held tap that does most of the cutting called? A) It is called the chamfer. B) It is called the flute. C) It is called the land. D) It is called the shank. 11. Which of the following is a true statement with respect to choosing the correct hacksaw blade pitch? A) A longer blade will always have a steeper pitch. B) Use a fine pitch blade for soft material. C) Use a course pitch blade for hard material. D) A course pitch blade will provide better chip clearance. 12. A long range dial indicator has a pointer movement of how many revolutions? A) It has a movement of 10 revolutions. B) It has a movement of 5.7 revolutions. C) It has a movement of 3.8 revolutions. D) It has a movement of 2.5 revolutions. 13. What is a precautionary statement in WHMIS? A) The name of the hazardous product. B) A phrase that describes direct measures. C) A prompt to alert the worker about the level of hazard. D) A phrase that describes the most significant hazard 14. Which of the following solutions is applied to the surface of large castings and hot rolled metal and will stick to the surface of the metal? A) Vermilion powder. B) Copper Sulphate. C) Chalk. D) Lime and alcohol. 15. Which of the following types of portable fire extinguishers is classified as the best type of extinguisher to use on a paper fire? A) Class A B) Class B C) Class C D) Class D 16. What is the following gauge block has greatest degree of precision? https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 2/14 6/10/24, 7:54 PM ExamBank Login A) Grade 1 B) Grade 2 C) Grade 3 D) Grade 4 17. What extinguishing agent should be used in a Class K fire? A) Foam. B) Regular dry chemical. C) Wet chemical. D) Purple K dry chemical. 18. What type of punch makes punch marks without the use of a hammer? A) Automatic. B) Centre. C) Prick Unit B: Machine Tools 19. Which of the following is NOT a chuck commonly found in industry? A) The three jaw universal chuck. B) The four jaw universal chuck. C) The magnetic chuck. D) The collet chuck. 20. What type of CNC turning center does not have a turret to hold cutting tools? A) A vertical single turning center. B) A twin spindle vertical turning center. C) A gang style horizontal spindle turning center. D) A sliding headstock turning center. 21. Which of the following is true with respect to a CNC machine? A) They are hard wired. B) They are adaptable but not overly flexible. C) They are difficult to program. D) They have a read-write memory. 22. With CNC turning machines, what is the program speed when reaming? A) It is generally 25 to 50 % of that used for drilling. B) It is generally 25 to 46 % of that used for drilling. C) It is generally 25 to 33 % of that used for drilling. D) It is generally 25 to 27 % of that used for drilling. 23. Which of the following refers to productivity and the advantages of slant CNC turning machines? A) The operator does not have to stop the machining process regularly to remove chips. B) When mounting and measuring tools the operator does not have to look over the tool posts. C) The open space in front of the spindle permits easy loading and unloading of workpeices. D) The dual voltage motors allow options for variable speed control. 24. What measurement must be used for a CNC lathe when doing a drilling operation? A) SFPM B) SPFS C) RPM D) Frequency 25. What is a transducer? A) It is a pulse counting stepper motor. B) It is a type of re-circulating ball screw. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 3/14 6/10/24, 7:54 PM ExamBank Login C) A device that monitors external variables and converts them into signals for a machine control unit. D) It initiates frequency modulation in CNC controllers. 26. What type of CNC turret has the fastest indexing time? A) Bi-directional. B) Uni-directional. C) Drum type. D) Quick change. 27. On a CNC turning machine, the purpose of centre drilling is to provide what degree conical surface for a bearing centre? (for work requiring a tailstock support) A) To provide a 70 degree. B) To provide a 60 degree. C) To provide a 50 degree. D) To provide a 40 degree. 28. When referring to CNC machines, what is a soft limit switch? A) A actual hardwired switch that activates when it is moved by something. B) A type of virtual or programmed switch that resides in the computer program. C) They limit guideways or recalculating ball screws. D) A type of power limiting generation device. 29. Which of the following best describes a microset adjustable centre? A) It uses an eccentric or dovetail. B) It rotates on a bearing to prevent friction and heat buildup. C) It is held in the tailstock spindle and does not turn. D) It turns with the headstock spindle. 30. Which of the following best describes a facing tool? A) It is used for cutting diameters. B) It is used to cut the inside of a diameter. C) It cuts on its ends. D) It is used to cut a flat surface at right angles to the axis of the workpiece. 31. What was the significance of the first Electrical Numerical Integrator and Calculator? A) It used vacuum tubes to simulate RAM B) It used silicon as switching devices. C) It inspired the development of automated control. D) It was the first to use transistor components. 32. Which of the following best describes a self driving centre? A) It is used when the entire length of the workpiece must be machined in one pass. B) It rotates on a bearing to prevent friction and heat buildup. C) It is held in the tailstock spindle and does not turn. D) It uses an eccentric or dovetail. 33. What is the recommended cutting speed in SFPM for high speed steel drills when the workpiece material is an Alloy/cast steel? A) 300 B) 150 C) 80 D) 40 34. What is program zero when referring to a CNC machine? A) It is fixed reference point that is established at shut down. B) The absolute reference point and origin of the machine coordinate system. C) A reference point on or off the workpeice. D) It is an example of a floating code system. 35. Which of the following best describes carbide as a cutting material? A) It retain its hardness to a very high temperature and is also known as Stellite. B) It has molybdenum as its principle alloy element. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 4/14 6/10/24, 7:54 PM ExamBank Login C) It can be used with or without a coolant. D) It operates at the highest cutting speeds. 36. The abrasive grit of the ________ is made of aluminium oxide and is used for cut-off operations. A) buffing wheel B) sanding disc C) flap wheel D) grinding disc 37. Which of the following best describes ceramic as a cutting material? A) It is made from aluminum oxide particles. B) It has molybdenum as its principle alloy element. C) It can be used with or without a coolant. D) It has a very high cutting speed and retains its hardness to 1800 degrees F. 38. The body of a twist drill has how many flutes cut into it? A) They have four flutes cut into it. B) They have three flutes cut into it. C) They have two flutes cut into it. D) They have no flutes cut into it. 39. What is the advantage of using a taper attachment over a compound rest for cutting tapers? A) Easy transformation of the lathe from taper turning to parallel turning. B) When using tailstock centre the work needs supporting. C) Mating tapers are easily produced with only two taper set-ups. D) The taper must be adjusted for workpieces of different lengths. 40. A taper attachment eliminates all backlash. A) True B) False 41. What is the recommended cutting speed SFPM for high speed steel drills when the workpiece material is grey cast iron? A) 300 B) 150 C) 80 D) 40 42. With CNC turning centres and lathes, what term is used to describe grooving? A) Threading. B) Undercutting. C) Turning. D) Facing. 43. In the surface speed formula used with CNC turning machines, as the diameter of the work piece increases what happens to the CS? A) It increases. B) It decreases. C) It stays the same. D) It is decreased by a factor of pi. 44. What type of CNC turret index's in only one direction? A) Bi-directional. B) Uni-directional. C) Drum type. D) Quick change. 45. When referring to a open loop CNC feedback system, which of the following is true? A) It monitors servo consistency though the use of ROM. B) It monitors actual speed and slide positions and compares them to program commands. C) It is not an expensive system and uses a stepper motor. D) Positional verification is achieved through a linear or rotary encoder. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 5/14 6/10/24, 7:54 PM ExamBank Login 46. When was the first practical digital super computer developed? A) 1969 B) 1958 C) 1947 D) 1939 47. What is the advantage of using a lathe to cut a thread with a tap versus tapping by hand? A) The advantage is the thread is produced much faster and deeper. B) The advantage is the tailstock will keep the tap aligned with the axis of the workpiece. C) The advantage is less thread lubrication is required. D) The advantage is the threads tend to be straighter. 48. How is an angle denoted with polar coordinates when measured counter clockwise? A) Positive. B) Negative. C) Either positive or negative. 49. When cutting a thread using a lathe and a compound rest set at degrees, the total infeed per side to finish the thread of a - 16 UNC thread would be how much of an inch? A) It would be 0.0470 of an inch. B) It would be 0.0561 of an inch. C) It would be 0.0625 of an inch. D) It would be 0.0695 of an inch. 50. Why does the Cincinnati Hydrotel vertical milling machine have a place in history? A) It could convert number systems as part of its programming. B) It could simultaneously control three axis of machine tool movement. C) It could choose the best method to machine a two dimensional object based on programming. D) It was a highly compact and used a uni-junction transistor. 51. Which of the following statements best describes a centre drill? A) It has a straight shank and a standard length and most commonly used. B) It drills and countersinks lathe work. C) It is used for holes from one to six inches in diameter. D) It is used to drill then countersink in one operation. 52. A floating reamer holder may _____ the effect of reamer misalignment. A) increase B) decrease C) stabilize 53. Which of the following best describes the MCU of a CNC machine? A) It consists of the RAM and the ROM. B) It is the heart of any computer system. C) It is the nerve centre of the CNC machine coordinating all machine operations. D) Its function is to develop appropriate signals from program data for driving servo motors. 54. In a CNC program, what does the M code M30 cause to happen? A) It will activate the spindle in the forward direction. B) It will cause the machine to stop executing a program. C) It will activate the spindle in the reverse direction. D) It will stop the program and reset to the beginning of the program. 55. Which of the following statements best describes a jig? A) A special work holding device used to guide the drill. B) A very versatile and convenient work holding device. C) A tool used for large and irregularly shaped work pieces. 56. What is the common rotary resolution for most CNC machines in degrees? https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 6/14 6/10/24, 7:54 PM ExamBank Login A) 0.0001 B) 0.001 C) 0.01 D) 0.1 57. What is the advantage of using an oil mist lubrication system? A) The advantage is that it re-circulates the oil. B) The advantage is that it is not affected by oil viscosity. C) The advantage is that it uses a lot more oil. D) The advantage is that it ensures the oil is always clean. 58. What is the RPM for drilling a 0.585-inch hole into 3.5 diameter leaded steel using an HSS twist drill? A) 1305.9 B) 979.43 C) 784.87 D) 652.9 59. Tailstock support for a CNC turning machine is important when the work overhang is more than how many times its diameter? A) When it is more than 10 times its diameter. B) When it is more than 8 times its diameter. C) When it is more than 6 times its diameter. D) When it is more than 4 times its diameter. 60. Which of the following best describes the servo drive control in a CNC machine? A) It consists of the RAM controlling specific stepper motors. B) It is a type of transitional servo control. C) It is the nerve centre of the CNC machine coordinating all machine operations. D) Its function is to develop appropriate signals from program data for driving servo motors. 61. What direction does a right-hand offset cut from? A) It cuts from left to right. B) It cuts from right to left. 62. On a lathe, where does the compound rest? A) It rests to the left of the cross-slide. B) It rests to the right of the cross-slide. C) It rests on top of the cross-slide. D) It rests to the bottom of the cross-slide. 63. What is machine zero when referring to a CNC machine? A) It is an unfixed reference point that is established at start up. B) The absolute reference point and origin of the machine coordinate system. C) A reference point on or off the workpeice. D) It is an example of a floating zero. 64. Which of the following best describes the CPU of a CNC machine? A) It consists of the RAM and the ROM. B) It is the heart of any computer system. C) It is the nerve centre of the CNC machine coordinating all machine operations. D) Its function is to develop appropriate signals from program data for driving servo motors. 65. When choosing the appropriate pitch of a band saw blade for a particular cutting operation, it is recommended to have at least how many teeth in contact with the work piece at all times? A) It is recommended to have at least two teeth in contact at all times. B) It is recommended to have at least four teeth in contact at all times. C) It is recommended to have at least five teeth in contact at all times. D) It is recommended to have at least six teeth in contact at all times. 66. What type of CNC turning center is also called the Swiss style turning center? A) A vertical single turning center. B) A twin spindle vertical turning center. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 7/14 6/10/24, 7:54 PM ExamBank Login C) A gang style horizontal spindle turning center. D) A sliding headstock turning center. 67. What is the calculated RPM for drilling a 0.585-inch hole into 3.5 diameter brass using an HSS twist drill? A) 1305.9 B) 979.43 C) 784.87 D) 652.9 68. How large should the flange be as compared to the wheel of the grinder? A) It should be exactly the same size. B) It should be half the diameter of the wheel. C) It should be one eighth the diameter of the wheel. D) It should be one third the diameter of the wheel. 69. Which of the following drills is used for deep holes in softer metals like copper and zinc? A) The straight fluted drills. B) The core drills. C) The high helix drills. D) The oil hole drills. 70. On a lathe what does the term "backlash" refer to? A) The space between meshing gears. B) The size of meshing gears. C) A type of inverted prism design. D) The bearing associated with the tailstock. 71. Which of the following best describes a sensitive drill press? A) It has a reservoir for cooling. B) The spindle accepts drills with tapered shanks. C) It is used for drilling larger holes. D) It is usually driven by a V-belt. 72. With CNC turning centres and lathes, what does the term "parting-off" refer to? A) Machining the outside diameter of the workpiece. B) Machining the ends of a workpeice. C) Machining that produces a channel on the diameter of the workpeice. D) Machining to separate a part from the main bar stock. 73. What determines the size of a lathe? A) The largest diameter of workpiece that can be supported over the ways. B) The greatest length of workpiece that can be supported between centers. C) The horsepower input into the machine. D) Both A and B. 74. Which of the following describes a stop shaft? A) It has six adjustable screws in an index-able head. B) It uses an adjustable screw for precise adjustment. C) It is clamped to the ways to stop the movement of the carriage. D) It is set up under the carriage to disengage the feed lever. 75. Which of the following is a disadvantage of a drill chuck? A) It can hold any number of different cutting tools. B) The shanks it used can be inexpensive. C) It has poor accuracy. 76. With respect to CNC turning centres which of the following is true with respect to twin spindle-twin turret arrangements? A) It is used where work must be machined on both ends. B) It is designed for work that must be machined from both sides at the same time. C) It is the most common arrangement. D) It is used in high production machining. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 8/14 6/10/24, 7:54 PM ExamBank Login 77. With a lathe, where is the headstock is always attached to? A) It is attached to the left side of the bed. B) It is attached to the right side of the bed. C) It is attached to the top of the bed. D) It is attached to the bottom of the bed. 78. Which of the following describes a turret stop? A) It has six adjustable screws in an index-able head. B) It uses an adjustable screw for precise adjustment. C) It is clamped to the ways to stop the movement of the carriage. D) It is set up under the carriage to disengage the feed lever. 79. Which of the following types of lathe dogs engages a slot in the drive plate? A) The safety clamp. B) The straight tail. C) The standard bent tail. D) The clamp. 80. A blotter is a heavy piece of metal attached to each side of a grinding wheel. A) True B) False 81. Where is the feed reverse lever found on a lathe? A) It is found on the gear box. B) It is found near the bed. C) It is found on the headstock. D) It is found in the tailstock. 82. What is machining of curved surfaces known as? A) Encountering. B) Undercutting. C) Profiling. D) Facing. 83. What should the feed rate for a roughing cut be? A) It should be as high as the cutting tool and the machine can handle. B) It should be as low as the cutting tool and the machine can handle. C) It should be as steady as the cutting tool and the machine can handle. 84. With respect to CNC turning centres which of the following is true with respect to single spindle-single turret arrangements? A) It is used where work must be machined on both ends. B) It is designed for work that must be machined from both sides at the same time. C) It is the most common arrangement. D) It is used in high production machining. 85. Which of the following statements best describes a vise? A) A special work holding device used to guide the drill. B) A very versatile and convenient work holding device. C) A tool used for large and irregularly shaped work pieces. 86. On a lathe, the feed rod moves the carriage at what kind of rate? A) It moves it at a faster rate than the lead screw does for threading. B) It moves it at a slower rate than the lead screw does for threading. C) It moves it at a more consistent rate than the lead screw does for threading. D) It moves it at a less efficient rate than the lead screw does for threading. 87. In a CNC program, what does the number preceded by T stand for? A) It will cause the machine to pause for a specified time. B) The station number for a turret index. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 9/14 6/10/24, 7:54 PM ExamBank Login C) It causes the machine to move in a counter-clockwise circular path. D) This identifies the spindle speed in rpm. 88. Which of the following parts from a plain taper attachment holds the base plate and guide bar in place? A) The cross-slide extension. B) The bed clamp. C) The guide shoe. D) The binding screws. Unit C: Trade Mathematics 89. Given that 1 pound = 0.454 kg, what is the value below? 125 lbs = ______ kg A) 275.33 B) 56.7 C) 5.67 D) 27.53 90. What is the fraction expressed as a percentage? A) It is 120 percent. B) It is 12 percent. C) It is 1.2 percent. D) It is 0.12 percent. 91. How is the amount of taper expressed in the imperial system? A) It is expressed as taper per 20 inches. B) It is expressed as taper per foot. C) It is expressed as taper per inch. D) It is expressed as taper per mil. 92. In the above diagram, if side is the same length as side , then what is angle ? A) Angle theta is more than 45 degrees. B) Angle theta is less than 45 degrees. C) Angle theta is equal to 45 degrees. D) Angle theta becomes 90 degrees. 93. What is the value below? 589 mm = _____ cm A) 5.89 B) 58.9 C) 0.589 D) 0.0589 94. Which of the following best describes a tapered pin? A) It is used to secure a drill chuck to its shank. B) It has a 3 1/2 inch taper per foot. https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 10/14 6/10/24, 7:54 PM ExamBank Login C) It is the most common of all tapers found on drills over 1/2 inch. D) The sizing numbers range from 7 to 14. 95. In the above diagram, how many degrees is angle when = 630 and = 400? A) Angle is 14.6 degrees. B) Angle is 26.3 degrees. C) Angle is 39.4 degrees. D) Angle is 50.6 degrees. 96. What percent of 965 is the value 627? A) 65% B) 35% C) 54% D) 19% 97. Perform the following function: What is the result expressed in the lowest terms? A) B) C) D) 98. Given that 1 inch = 25.4 mm, what is the value below? 365.76 cm = ______ feet A) 1.2 B) 144 C) 14.4 D) 12 99. Given that 2 pound = 0.908 kg, what is the value below? 113.4 kg = ______ lbs A) 51.48 B) 125 C) 250 D) 102.97 100. What would 12.5% be when converted to a decimal expression? A) 12.5 B) 1.25 C) 0.125 D) 0.0125 101. The two sides of a rectangle measure 5.4 ft and 8.2 ft respectively. What is the perimeter of this rectangle? https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 11/14 6/10/24, 7:54 PM ExamBank Login A) It is 27.2 feet. B) It is 21.8 feet. C) It is 16.4 feet. D) It is 13.6 feet. 102. A stack of 35 pieces of steel weighs 1800 pounds. A stack of 43 pieces of the same material will weigh how many pounds? A) 1465 pounds. B) 2211 pounds. C) 3265 pounds. D) 1987 pounds. 103. A team of 12 machinists completed the machining order in 8 hours. If the same job has to be completed in 6 hours how many machinists would be required to do the work? A) 14 B) 16 C) 18 D) 20 104. What is the large diameter of a taper, where TR=1:30, d=60mm, TL=60mm? A) 62.0 B) 61.0 C) 60.0 D) 59.5 Unit D: Print Reading 105. A circle drawn in an isometric projection would form an ellipse. A) True B) False 106. When referring to material section lines on a blueprint, which of the above would represent a material section for steel? A) #1 B) #2 C) #3 D) #4 107. What are the angles on the following set square? A) 90°, 45°, 45° B) 45°, 60°, 30° C) 90°, 60°, 30° D) 90°, 45°, 60° 108. The designation of a bolt is as follows: 3/8 - 16 UNC X4 https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 12/14 6/10/24, 7:54 PM ExamBank Login What does the 16 represent in the above designation? A) The length of the bolt. B) The threads per inch of the bolt. C) The thread form of the bolt. D) The thread series of the bolt. 109. Which of the above machine screw driving recesses represents a Slotted Spanner? A) A B) C C) D D) F 110. When referring to material section lines on a blueprint, which of the above would represent the CSA standard material section for rubber? A) #1 B) #2 C) #3 D) #4 111. Which of the following best describes the term "actual size"? A) The size to which the tolerances are applied. B) The size used for identifying the part. C) The size of the part after it has been machined. D) The largest and smallest size a workpeice can be. 112. Which type of "nut" is shown in diagram B? A) Hex Castle B) Self-locking C) Acorn D) Hex Flange 113. When referring to surface finishes, what does the term "surface roughness" mean? A) The pattern of groves or scratches left on the surface of a workpiece by the cutting action of the tool. B) The intended surface of the workpiece as specified in the drawing. C) The average deviation from the centerline measured in microinces or micro meters. D) The greatest spacing between adjacent grooves or scratches. 114. When referring to machinist blueprints, what is the function of a cutting plane line? https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 13/14 6/10/24, 7:54 PM ExamBank Login A) It shows that a part is the same on either side of the line. B) It allows a shape to be drawn in less space. C) It indicates where the sectional view came from. D) It determines the type of material to use. 115. When referring to surface finishes, what does the term waviness refer to? A) An unrepeated or random irregularity in the surface finish of a workpiece. B) The predominate direction of the roughness patterns. C) The distance between repeated wavy patterns. D) It consists of the widely spaced irregularities caused by vibration or chatter. 116. What is the difference in area between a circular tolerance zone and a square tolerance zone? A) 25% B) 33% C) 57% D) 74% 117. What type of self-threading screw would be used to assemble zinc? A) Thread forming screws. B) Thread cutting screws. 118. What type of self-threading screw would be used to assemble sheet metal? A) Thread forming screws. B) Thread cutting screws. 119. When referring to surface finishes, what does the term "roughness width cut-off" mean? A) The pattern of groves or scratches left on the surface of a workpiece by the cutting action of the tool. B) The intended surface of the workpiece as specified in the drawing. C) The average deviation from the centerline measured in microinces or micro meters. D) The greatest spacing between adjacent grooves or scratches. 120. When referring to machinist blueprint drawings, what assumption is made about all threads? A) It is assumed they are right hand unless otherwise noted. B) It is assumed they are centered unless otherwise noted. C) It is assumed they are left hand unless otherwise noted. D) It is assumed they are rotated unless otherwise noted. Submit Test For Online Marking Get Answer Key Important! If you want the computer to mark your test for you, click on "Submit Test for Online Marking" above. Only click on "Get Answer Key" if you have printed this test, and want to get a corresponding answer key to print off as well. For most browsers, if you click on the wrong button, you will be unable to go back if you change your mind. Request took 0.144 seconds. Exam ID: 1718070381 Copyright © 2024, Syzygy Research & Technology Ltd. All rights reserved. Follow us; we're friendly! https://trades.exambank.com/cgi-bin/examinator2/1429?session=1718070381&key=3887730062&action=getexam 14/14