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

Blunt tool

Heavy depth of cut

Insufficient side clearance

Any of the above

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

try square

centre gauge

thread plug gauge

template

Answer is:

Explanation:

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

Threading tools are checked for accuracy for the 60 Degree angle by using a centre gauge

M 10 x 1.25 is a fine pitch thread

M 10 is a coarse pitch thread

Same tool is used for cutting external and internal threads

Answer is:

less than that for the plain turning operation

more than that for the plain turning operation

equal to that for plain turning operation

None of the above

Answer is:

Inserted tool bits are more advantageous while cutting threads

Before cutting internal threads, the hole should be chamfered

When internal thread cutting is done in a blind hole, a recess should be provided

When cutting internal threads, the core diameter may be equal to the size of external threads

Answer is: