Kindly answer the question correctly in the box mentioned below

1.   Which tools are convenient to remove a stud broken very near to the surface?

A Fire and spanner

B Chisel and hammer

C Screw driver and hammer

D Prick punch and hammer

2.   What is the size of blind hole to be drilled in the surface of broken stud for it’s removal using a square punch?

A Hole diameter equal to stud diameter

B Hole diameter is 1/4 of stud diameter

C Hole diameter is 3/4 of stud diameter

D Hole diameter is half of the stud diameter

3.   What is the reason for the breakage of a bolt or stud?

A Improper lubrication to threads

B Overheating of part to which stud is fitted

C Excessive torque is applied to the stud nut

D Lock tight solution not applied during fitment

4.   To remove the broken studs left hand turn by using...

A Pipe wrench

B Allen wrench

C Stud extractors

D Stud screw driver