《数控技术专业英语》课程期末练习之手机自测题（110题）

Ⅰ. Decide whether the following statements are true (T) or false (F).

1. (   ) Non-cylindrical shapes generally can be faced on the lathe.

2. (   ) The finishing cut can be made at lower RPM.

3. (   ) To obtain uniform cutting speed, the lathe spindle must be revolved slower for workpieces of small diameters and faster for workpieces of large diameters.                    

4. (   ) Generally, the deeper the cut, the slower the speed, since a deep cut requires more power.     

5. (   ) The NC program can be run only once on the CNC machine tool. 

6. (   ) Turning with power feed will produce more even finish than is generally achievable by hand feed on the engine lathe. 

7. (   ) The work zero point of the part is decided by the programmer. 

8. (   ) The X-axis moves the table to and from the operator on the vertical machining center. 

9. (   ) Micrometers are more accurate than calipers. 

10. (   ) Drilling and tapping can be performed on the lathe.

11. (   ) On conventional machine tools, about 80% of the time was spent removing material.

12. (   ) Boring and tapping can be performed on the milling machine.

13. (   ) The turning center has the same basic axes as the engine lathe.

14. (   ) Feed can be programmed in either mm/min or mm/r.

15. (   ) The turning center is more accurate and more productive than the engine lathe.

16. (   ) If the material to be cut is hard and tough, the feed rates are small.  

17. (   ) A constant cutting speed is important to ensure optimum cutting in a turning operation.

18. (   ) A worn or dull tool requires more power to machine a workpiece than a sharp tool.

19. (   ) The lathe is widely used in producing box-type work.

20. (   ) On a CNC machine, the tool is monitored by man.

21. (   ) Cutter chatter shortens the life of the cutter.

22. (   ) Most lathes are programmed on three axes: X-axis, Y-axis and Z-axis.

23. (   ) The cutting tools are manually selected on the machining center.

24. (   ) Fine boring is a kind of roughing operation.

25. (   ) Speed and feed of threading operations are governed by the lead of the thread.

26. (   ) As the ratio between length and diameter decreases, the rigidity of the boring bar increases. 

27. (   ) A boring bar with a 4:1 length-to-diameter ratio is more rigid than one with 1:1 ratio.

28. (   ) A worn or dull tool requires less power to machine a workpiece than a sharp tool. 

29. (   ) The actual tool change time on the machining center is usually 10-20s.

30. (   ) Reaming is a kind of roughing operation.

31. (   ) The cutting tools are automatically selected by the part program on a machining center. 

32. (   ) Computers were not found on earlier NC machines.  

33. (   ) On a CNC machine, the tool is monitored by computer-control module.

34. (   ) CNC machines have reduced non-chip-producing time.                 

35. (   ) G42 is used to specify the tool length compensation.           

36. (   ) In this block of program, G01 X100 Y250 F200, G01 designates the motion rate.

37. (   ) Tool length compensation command is G43.

38. (   ) In the incremental mode, if a motion mistake is made in one command of the program, only one movement will be incorrect.

39. (   ) G00 shows that the machine will make cuts.

40. (   ) Turning centers allow feed rate to be specified in inches or millimeters per revolution.

41. (   ) We can write G90 and G91 in the same line.

42. (   ) Today the NC program is loaded into and executed from the tape.

43. (   ) The machine control panel is designed and manufactured by the machine tool builder to adapt to different machines.  

44. (   ) On a vertical machining center, the top of your part should be Z0.    

45. (   ) The button cap color for stop function, such as emergency stop and spindle stop, is usually red.

46. (   ) Zero return operation searches for work zero.   

47. (   ) Blocks containing the slash symbol (/) will be deleted from the control’s memory when the BLOCK DELETE switch is ON.  

48. (   ) The miscellaneous function buttons on the control panel are just hardware switches which serve the same purpose as G codes.    

49. (   ) The smallest movement increments caused by one single output pulse is usually 0.0001mm.

50. (    ) With every control, straight line motion will occur during rapid motion commands.

Ⅱ.  Select an answer from the four (or three) choices.

51. Which component supports and rotates workpieces about the axis of the lathe?

   ( A ) Spindle                 

   ( B ) Carriage            

   ( C ) Quill 

52. When advancing the cross slide by .010', the diameter is reduced by:

   ( A ) .005'                

   ( B ) .010'            

   ( C ) .020'

53. Which statement is true?

   ( A ) Turning with hand feed will produce a much smoother and more even finish than is generally achievable by power feed.

   ( B ) Power feed is a lot more convenient than hand cranking in some applications.

   ( C ) If carbon steel cutter bits are used, speeds may be 2 or 3 times as high as those given for high-speed steel cutter bits.

54. Which cutter bits allow the greatest cutting speed?

   ( A ) Carbon steel  

   ( B ) Carbide-tipped

   ( C ) High-speed steel

55. The device shown in fig.A1-1 is probably used on a:

fig.A1-1 Turret

   ( A ) Milling machine

   ( B ) Turning center

   ( C ) Machining center

56. When you rotate the carriage handwheel clockwise of the lathe,

   ( A ) The tool is moved towards the free end of the work

   ( B ) The tool is moved towards the headstock

   ( C ) The tool is moved towards the center of the work

57. On the horizontal milling machine, the horizontal movement of the worktable will be in the:

   ( A ) Z- and X-axes

   ( B ) X- and Y-axes

   ( C ) Z- and Y-axes

58. The spindle speed is usually measured in: 

   ( A ) mm/min                 

   ( B ) r/min                  

   ( C ) p/r

59. As shown in fig.A1-2, this machine can be programmed on (   ) axes.

   ( A ) Three                      

   ( B ) Four                   

   ( C ) Five

fig.A1-2 Multi-axis machine

60. Which keys are forediting the NC program in the FANUC series operator's panel?

61. Which NC code will generally determine the measurement system used when machining a part?

   ( A )  G code

   ( B )  S code

   ( C )  M code

   ( D )  F code

62. For what industry was the first NC machine used?

   ( A )  Computer

   ( B )  Aviation

   ( C )  Automobile

   ( D )  Toy

63. A vertical milling machine has a spindle axis of rotation:

   ( A )  Vertical with the table

   ( B )  Perpendicular to the table

   ( C )  Horizontal

   ( D )  None of the above

64. To keep your machine maintained you must:

   ( A )  Oil it daily

   ( B )  Keep it clean

   ( C )  Grease it daily

   ( D )  All of the above

65. In the picture (fig.A2-1) the upper arrow is pointing to what part of the milling machine?

fig.A2-1 A milling machine

( A )  Bed

( B )  Column

( C )  DRO

( D )  CNC control 

66. In the picture above (fig.A2-1) the middle arrow is pointing to what part of the milling machine? 

   ( A )  Lever

   ( B )  Handle

   ( C )  Column

   ( D )  None of the above  

67. In the picture above (fig.A2-1) the lower arrow is pointing to what part of the milling machine?

   ( A )  Spindle

   ( B )  Column

   ( C )  Handle

   ( D )  None of the above

68. In the picture (fig.A2-2) the arrow is pointing to what part of the machining center?

fig.A2-2 A machining center

   ( A )  Spindle

   ( B )  Magazine

   ( C )  Tool

   ( D )  None of theabove 

69. In the picture (fig.A2-3) the arrow is pointing to what part of the machine control panel?

fig.A2-3 Control panel

   ( A )  Operation modes

   ( B )  Alpha keys

   ( C )  Overrides

   ( D )  None of the above

70. The operator’s panel shown in the picture (fig.A2-4) is probably made by:

fig.A2-4 Operator’s panel

   ( A )  HAAS

   ( B )  SIEMENS

   ( C )  FANUC

   ( D )  None of the above 

71. Which machine is called the father of machine tools?

   ( A ) The mill                  

   ( B ) The lathe             

   ( C ) The drill

72. Boring is:

   ( A ) A machine that turns a piece of metal round and round against a sharp tool that gives it shape

   ( B ) The operation of enlarging a hole with a single-point tool. This operation produces a close tolerance and fine finish（表面光洁度）

   ( C ) The motion of moving the work piece and the cutting tool together so as to remove material

73. The machine that turns a piece of metal round and round against a sharp tool is:

   ( A ) Milling machine           

   ( B ) Lathe             

   ( C ) Boring machine

74. The lathe is widely used in producing（  ）work. 

   ( A ) Box-type                   

   ( B ) Round              

   ( C ) Complex

75. What is the lathe bed made of?

   ( A ) Aluminum              

   ( B ) Steel                 

   ( C ) Cast iron

76. Which component supports and rotates workpieces about the axis of the lathe?

   ( A ) Spindle                   

   ( B ) Quill                 

   ( C ) Carriage

77. Milling machine is:

   ( A ) A machine that turns a piece of metal round and round against a sharp tool that gives it shape

   ( B ) A machine that removes metal through the use of electrical sparks（电火花）which burn away the metal

   ( C ) A machine tool that removes material by rotating acutter and moving into the material. It is used to produce flat and angular surfaces, grooves（槽）, contours（轮廓）, and gears

78. What movement does the table provide the vertical machining center with?

   ( A ) The Y- and X-axes movement

   ( B ) The Z- and Y-axes movement

   ( C ) The Z- and X-axes movement

79. The machining center can automatically select and change the tools that:

   ( A ) Move left and right

   ( B ) Move up and down

   ( C ) Have been preset

80. A single NC machine is the same as a machining center inthe fact that:

   ( A ) Both of them can select and change tools automatically

   ( B ) Both of them must be programmed

   ( C ) Both of them employ a tool magazine

81. In the picture (fig.A4-1) the arrow is pointing to what part of the FMC?

fig.A4-1 Flat carrier type FM

   ( A )  Panel

   ( B )  Pallet

   ( C )  Turret

   ( D )  None of the above

82. We call the switch shown in the picture (fig.A4-2(a)):

fig.A4-2 Operating components

   ( A ) Override

   ( B ) EMG stop

   ( C ) Spindle load meter

   ( D ) Handle 

83. We call the component shown in the picture (fig.A4-2(b)): 

   ( A ) Override

   ( B ) EMG stop

   ( C ) Spindle load meter

   ( D ) Handle

84. This switch shown in the picture (fig.A4-2(c)) is: 

   ( A ) Override

   ( B ) EMG stop

   ( C ) Handle

   ( D ) To select operation mode

85. This button shown in the picture (fig.A4-2(d)) is: 

   ( A ) Override

   ( B ) EMG stop

   ( C ) Spindle load meter

   ( D ) Handle 

86. M01 is usually the code for:

   ( A ) Program stop

   ( B ) Optional stop    

   ( C ) End of program 

87. For which tools is the length compensation used?

   ( A ) Drills or taps

   ( B ) Milling cutters  

   ( C ) Lathe tools 

88. G42 will select the cutter radius compensation:

   ( A ) Left

   ( B ) Right

   ( C ) Neither 

89. Which command should be used to program the contour according to fig.A4-3?

fig.A4-3 Contourmilling

   ( A )  G41

   ( B )  G42

   ( C )  G49 

90. The Y-axis on a vertical milling machine:

   ( A )  Controls the table movement left or right

   ( B )  Controls the table movement toward or away from the column

   ( C )  Controls the up or down movement of the spindle 

91. How often do we clean chips?

   ( A ) Daily                 

   ( B ) Weekly                

   ( C ) Monthly 

92. Which of the following are the two main functions of the cutting fluid in machining?

   ( A ) Improve surface finish on the workpiece and wash away chips

   ( B ) Reduce forces and power

   ( C ) Remove heat from the process and reduce friction at the tool-chip interface 

93. What’s the proper sequence of changing the processor’s board?

   ( A ) ①→④→③→②→⑤

   ( B ) ①→②→③→④→⑤

   ( C ) ④→①→⑤→②→③

94. Tool changing in turning centers is a kind of:

   ( A ) Spindle function

   ( B ) Feed function

   ( C ) Miscellaneous function

95. With the capabilities of maintaining constant surface speed(CSS) at the point of the cutting tool, the spindle speed will automatically (   ) as the diameter decreases during a turning operation.

   ( A )   Increase                   

   ( B )   Decrease               

   ( C )   Remain unchanged

96. This machine (fig.A5-1) is:

fig.A5-1 Verticalmilling machine

   ( A )  Horizontal

   ( B )  Vertical

   ( C )  Rotational

97. This operation shown in fig.A5-2 is called:

fig.A5-2 A kindof operation

   ( A )  Mirror

   ( B )  Canned cycle

   ( C )  Interpolation

98. What movement does the column provide the horizontal machining center with?

   ( A ) The X-axis movement

   ( B ) The Y-axis movement

   ( C ) The Z-axis movement

99. Mazak Cyber Production Center is:

   ( A ) A large workshop

   ( B ) A multi-tasking machining center

   ( C ) A computer software system 

100. A single NC machine is the same as a machining center in the fact that:

   ( A ) Both of them can select and change tools automatically

   ( B ) Both of them must be programmed

   ( C ) Both of them use a tool magazine 

101. The cutting tool shown below is:

   ( A ) Milling cutter

   ( B ) Boring tool

   ( C ) Drill

   ( D ) Tap

102. The cutting tool shown below is:

   ( A ) Milling cutter

   ( B ) Tap

   ( C ) Drill

   ( D ) Boring tool

103. The component shown below is called:

   ( A ) Chuck

   ( B ) Tailstock

   ( C ) Spindle

   ( D ) Turret 

104. The component shown below is called:

   ( A ) Chuck

   ( B ) Tailstock

   ( C ) Spindle

   ( D ) Turret 

105. The component shown below is called:

   ( A ) Chuck

   ( B ) Tailstock

   ( C ) Vise

   ( D ) Turret

106. The component shown below is called:

   ( A ) Ballscrew

   ( B ) Bearing

   ( C ) Ring

   ( D ) Flange

107. The machining operation shown below is called:

   ( A ) Drilling

   ( B ) Milling

   ( C ) Tapping

   ( D ) Boring 

108. The machining operation shown below is called:

   ( A ) Grinding

   ( B ) Milling

   ( C ) Tapping

   ( D ) Turning

109. The machining operation shown below is called:

   ( A ) Drilling

   ( B ) Milling

   ( C ) Boring

   ( D ) Chamfering

110. The machining operation shown below is called:

   ( A ) Grinding

   ( B ) Grooving

   ( C ) Cutting-off

   ( D ) Facing

“四位一体”专业英语 | 《数控技术专业英语》课程期末练习题

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与本题库配套的纸质教材是《数控技术专业英语（第3版）》。