Production technology MCQ part 1

Production technology MCQ part 1

01. The tool life __________ as the cutting speed increases.

decreases

02. The enlarging of an existing circular hole with a rotating single point tool is called

boring

03. Glazing in grinding wheels __________ cutting capacity.

decrease

04. The usual value of the helix angle of a drill is

30°

05. The cutting speed for counterboring should be __________ that of drilling operation.

greater than

06. The angle between the face and flank of the single point cutting tool is known as

lip angle

07. Stellite preserve hardness up to a temperature of

1100°C

08. A tool used to withdraw a drill from the sleeve is called

drift

09. The cutting fluid mostly used for

machining steel is

soluble oil

10. The lip angle is the angle

between the tool face and the ground end surface of flank

11. Small nose radius

results in excessive stress concentration and greater heat generation

12. As the cutting speed increases, the tool cutting forces

decreases

13. The width of cutting edge of a parting-off tool varies from

3 to 12 mm

14. In centerless grinding, work place center will be

  

above the line joining the two-wheel centers

15. Mild steel during machining produces __________ chips.

continuous

16. Crater wear is mainly due to the

phenomenon known as

diffusion of metals

17. The cutting speed for drilling aluminum, brass and bronze with high speed steel drills varies from

60 to 90 m/min

18. The operation of machining several surfaces of a workpiece at the same time is called

gang milling

19. The grinding wheel speed (surface speed in m/min) usually varies from

1500 to 2000

  

20. The plunge grinding requires very __________ speed.

low

  

21. With the same tool life, the maximum material per minute is removed by

increasing the depth of cut

22. The abrasive recommended for grinding materials of low tensile strength is

silicon carbide

23. The chamfering is an operation of

  

beveling the extreme end of a workpiece

24. The hard grade grinding wheels are denoted by the letters

  

Q to Z

  

25. Up milling is also called

conventional milling.

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