37) 30 degree is equal to _____ radians.

Pie/3

Pie/6

Pie/2

Pie/4

Answer is:

Pie/6

ISRO Technician-B Fitter Question Paper - 2012 (Set - 1) with Answer Key

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38) The operation which provides strength to the sheet metal jobs?

Shearing

Blanking

Swaging

Piercing

Answer is:

Swaging

39) For TIG welding, commonly used gase is

Acetylene

Hydrogen

Argon

All of these

Answer is:

Argon

40) A jig is used for

Easy movement of the job

Holding the job

Setting work piece on the job

Holding and guiding the tool

Answer is:

Holding and guiding the tool

Explanation:

A jig is a work-holding device that holds, supports, and locates the workpiece and guides the one or more tools to perform a specific operation.

A fixture is a work-holding device that only holds, supports, and locates the workpiece, but does not guide the tools to perform a specific operation.