ISRO Technician-B Fitter Question Paper - 2016 (Set - 4) with Answer Key

ISRO Technician-B Fitter Question Paper - 2016 (Set - 4) with Answer Key

61) If the major diameter of an ISO metric thread is 6 mm and the pitch is 1 mm the recommended tap drill diameter is

Answer is:

5 mm

62) If the recommended cutting speed of mild steel is 20 m/min, what is the rotational speed (rpm) required for a Dia=20 mm drill bit?

Answer is:

320 rpm

63) Tool will rub against the work surfaces and the cutting force increases when

Answer is:

Clearance angle is less

64) The rake angle required for machining cast iron is

Answer is:

0 degree

65) Helix angle in twist drill determines the

Answer is:

Rake angle

Helix angle in twist drill determines the