Lathe Operations MCQ with Answers

16) Which among the following is the cause for incorrect pitch of thread during thread cutting with single point tool ?

Answer is:

Any of the above

Explanation:

Incorrect pitch of thread during thread cutting with single point tool due to
Incorrect selection of change gears
Lead screw worn out
Half nut worn out

Which among the following is the cause for incorrect pitch of thread during thread cutting with single point tool ?

17) Which one of the following is the reason for torn threads while thread cutting on lathe ?

Answer is:

Any of the above

Explanation:

Reason for torn threads while thread cutting on lathe can be due to
Blunt tool
Heavy depth of cut
Insufficient side clearance

Which one of the following is the reason for torn threads while thread cutting on lathe ?

18) For setting of tool for threading, it is aligned with the work by using

Answer is:

centre gauge

Explanation:

For setting of tool for threading, it is aligned with the work by using centre gauge.

19) Which among the following statements in respect of threads / thread cutting is NOT correct ?

Answer is:

Same tool is used for cutting external and internal threads

Explanation:

Different tool types are required for cutting external and internal threads.

Which among the following statements in respect of threads / thread cutting is NOT correct ?

20) While cutting internal threads on lathe with single point tool, the spindle speed should be

Answer is:

less than that for the plain turning operation

Explanation:

While cutting internal threads on lathe with single point tool, the spindle speed should be less than that for the plain turning operation.