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Chapter:

16. Compound rest swiveling method in taper turning operation is most suitable for

Long jobs with small taper angles Short jobs with small taper angles Short jobs with steep taper angles Long jobs with steep taper angles

Short jobs with steep taper angles

Compound rest swiveling method gives less space and less revolution and hence in taper turning operation it is most suitable for Short jobs with steep taper angles.

Hint Answer

17. What will be value of diameter of small end in mm for tapered job if diameter of big end and length of job is 60mm and 1m respectively? Given half taper angle is equal to 1.14 degrees.

600 200 100 300

100

Small end diameter can be calculated using- tan (half taper angle) = (D-d)/ (2*L).

Hint Answer

18. For turning internal tapers, suitable method is

by a form tool by setting over the tail stock by a taper turning attachment none of the mentioned

by a taper turning attachment

None

Hint Answer

19. During taper turning operation 100mm of smaller side diameter and 800mm of bigger side diameter was required. What will be value of taper gradient for a job of 1m in length?

15.01 19.29 28.35 56.31

19.29

Taper gradient= tan (half taper angle) = (D-d)/ (2*L).

Hint Answer

20. Which of following will give best result for taper turning on internal surface?

Using tailstock offset method Using taper attachment method Using form tool Using compound rest method

Using compound rest method

Compound rest method is generally used for taper turning on internal surfaces.

Hint Answer

21. Which of following is mostly used for holding bored part of job?

Mandrels Dogs Collet Angle plate

Mandrels

Mandrels are used to hold bored job during machining process of jobs.

Hint Answer

22. Which of following part of la move in a direction normal to axis of spindle?

Cross slide Saddle Compound rest None of the mentioned

Cross slide

Cross slide move in a direction normal to axis of spindle during process of machining in la machine.

Hint Answer

23. A thread has number of starts equal to one. Which of following is most correct about thread?

Pitch > lead Pitch< Pitch < lead Pitch=lead

Pitch=lead

Pitch=lead/number of starts.

Hint Answer

24. Distance measured normal to axis of part, between crest and root of thread is known as

Pitch Depth of threads Thread angle Major diameter

Depth of threads

Depth of threads is distance measured normal to axis of a part, between crest and root of thread.

Hint Answer

25. If cutting tool travel 1000mm in direction of feed motion with work piece rotational speed of 500 rpm and feed rate of 0.2mm/rev, machining time in minutes will be

2 6 8 10

10

Use t=L/ FN) where ‘t’ is time, ”L’ is effective length, ‘F’ is feed and ‘N’ is number of revolution per second.

Hint Answer

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Topics

This Chapter consists of the following topics

Lathe Machines

Shaping and Slotting

Compound rest swiveling method in taper turning operation is most suitable for

What will be value of diameter of small end in mm for tapered job if diameter of big end and length of job is 60mm and 1m respectively? Given half taper angle is equal to 1.14 degrees.

For turning internal tapers, suitable method is

During taper turning operation 100mm of smaller side diameter and 800mm of bigger side diameter was required. What will be value of taper gradient for a job of 1m in length?

Which of following will give best result for taper turning on internal surface?

Which of following is mostly used for holding bored part of job?

Which of following part of la move in a direction normal to axis of spindle?

A thread has number of starts equal to one. Which of following is most correct about thread?

Distance measured normal to axis of part, between crest and root of thread is known as

If cutting tool travel 1000mm in direction of feed motion with work piece rotational speed of 500 rpm and feed rate of 0.2mm/rev, machining time in minutes will be

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