ISRO Draughtsman-B Mechanical Question Paper - 2019 (Set -1) with Answer Key

ISRO Draughtsman-B Mechanical Question Paper - 2019 (Set -1) with Answer Key

21) An empty drum of mass 50 kg is resting on a shop floor. Find the co-efficient of rolling friction if a force of 100N makes it just move. (Assume g = 10 m/square second)

Answer is:

0.2

22) Which of the following is used to measure temperature?

Answer is:

All of the above

Explanation:

Thermocouple, Thermometer and Pyrometers are used to measure temperature.

23) A body of mass 10 kg strikes a wall with a momentum of 1000 kg.m/sec. The velocity with which it strikes the wall is

Answer is:

100 m/s

24) A mortise gauge is a

Answer is:

Marking tool

Explanation:

A mortise gauge is a Marking tool.
A mortise gauge is a woodworking tool used by a carpenter or joiner to scribe mortise and tenon joints on wood prior to cutting. Mortise gauges are commonly made of hardwood with brass fittings.

25) In spot welding, recommended minimum distance between the nearest edge of the plate and centre of spot weld of diameter 'd' should be equal to

Answer is:

21) An empty drum of mass 50 kg is resting on a shop floor. Find the co-efficient of rolling friction if a force of 100N makes it just move. (Assume g = 10 m/square second)

0.2

22) Which of the following is used to measure temperature?

All of the above

23) A body of mass 10 kg strikes a wall with a momentum of 1000 kg.m/sec. The velocity with which it strikes the wall is

100 m/s

24) A mortise gauge is a

Marking tool

25) In spot welding, recommended minimum distance between the nearest edge of the plate and centre of spot weld of diameter 'd' should be equal to

1.5d