The angle of I.S. thread (V-shaped) is

29 Degree

47 Degree

50 Degree

60 Degree

Answer is:

60 Degree

Explanation:

The angle of I.S. thread (V-shaped) is 60 Degree

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44) Which one of the following is the reason for rough and broken threads ?

Thread cutting tool blunt

The size of hole or diameter of the blank for bolt is not correct

The flutes of cutting tool are filled with chips

All the above

Answer is:

All the above

Explanation:

The reasons for rough and broken threads are
Thread cutting tool is blunt
The size of hole or diameter of the blank for bolt is not correct
The flutes of cutting tool are filled with chips

45) In a single start thread

Lead and pitch are equal

Lead is double the pitch

Pitch is double the lead

Lead is half the pitch

Answer is:

Lead and pitch are equal

Explanation:

Lead is the distance of a threaded component moves along the matching component during one complete revolution. For a single start thread the lead is equal to the pitch.