Lathe MCQ - Machinist(Set-1) with Answers

76) Which among of the following methods can be used for cutting long and narrow external taper threads ?

Answer is:

Either 'A' or 'B'

77) When using a yoke type taper turning attachment, the depth of cut is given by

Answer is:

compound slide

78) Which one of the following methods is used to press the mandrel squarely to the workpiece ?

Answer is:

By arbor press

79) 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 ?

80) 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