Mechanical Engineering Test Preparations On Engineering Mechanics Part 2

Test Preparation on Mechanical Engineering Test Preparations On Engineering Mechanics Part 2

1.

The unit of energy in S.I. units is

1dyne
2kg-m
3watt
4joule

2.

The angle of inclination of the plane at which the body begins to move down the plane, is called

1angle of friction
2angle of repose
3angle of projection
4none of these

3.

Which of the following statement is incorrect?

1A force acting in the opposite direction to the motion of the body is called force of friction.
2The ratio of the limiting friction to the normal reaction is called coefficient of friction.
3A machine whose efficiency is 100% is known as an ideal machine.
4The velocity ratio of a machine is the ratio of load lifted to the effort applied.

4.

The moment of a force

1is the turning effect produced by a force, on the body, on which it acts
2is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force
3is equal to twice the area of the traingle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken
4all of the above

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