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Production Engineering

11

The effect of setting a boring tool above centre height leads to

A. increase in the effective rake angle and a decrease in the effective clearance angle
B. increase in both effective rake angle and effective clearance angle
C. decrease in the effective rake angle and an increase in the effective clearance angle
D. decrease in both effective rake angle and effective clearance angle
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12

A bottoming tap has

A. its end tapered for about three or four threads
B. its end tapered for about eight or ten threads
C. full threads for the whole of its length
D. none of the above
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13

  Negative rakes are used for

A. carbide tools
B. heavy loads
C. harder materials
D. all of these
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14

The chuck preferred for quick setting and accurate centering of a job is

A. four jaw independent chuck
B. collect chuck
C. three jaw universal chuck
D. magnetic chuck
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15

  The tail stock set over method of taper turning is preferred for

A. internal tapers
B. small tapers
C. long slender tapers
D. steep tapers
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