ISRO Technician-B Machinist Question Paper - 2015 (Set -1) with Answer Key

ISRO Technician-B Machinist Question Paper - 2015 (Set -1) with Answer Key

21) CNC machines are controlled by means of

Answer is:

Program

22) Counter boring is done for

Answer is:

Accommodate socket head screws

Explanation:

Counter boring is the operation of enlarging the end of a hole using a tool called counterbore. Counter boring is done for accommodating socket head screws.

23) Quick return mechanism is employed in

Answer is:

Shaping machine

24) A point to point control system is suitable only for one of the following operations

Answer is:

Drilling

25) While using quick return mechanism in shaping machine the cutting stroke moves slow & return stroke moves fast. What is the ratio between cutting stroke & return stroke

Answer is:

21) CNC machines are controlled by means of

Program

22) Counter boring is done for

Accommodate socket head screws

23) Quick return mechanism is employed in

Shaping machine

24) A point to point control system is suitable only for one of the following operations

Drilling

25) While using quick return mechanism in shaping machine the cutting stroke moves slow & return stroke moves fast. What is the ratio between cutting stroke & return stroke

3:2