Engineering Mechanics MCQs

Question 1

In order to determine the effects of a force, acting on a body, we must know

Accepted Answer

All of the above

Answer

Magnitude of the force

Answer

Line of action of the force

Answer

Nature of the force i.e. whether the force is push or pull

Question 2

In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Accepted Answer

Less than

Answer

Equal to

Answer

More than

Answer

None of these

Question 3

Frictional force encountered after commencement of motion is called

Accepted Answer

Dynamic friction

Answer

Limiting friction

Answer

Kinematic friction

Answer

Frictional resistance

Question 4

Two balls of equal mass and of perfectly elastic material are lying on the floor. One of the balls with velocity ‘v’ is made to strike the second ball. Both the balls after impact will move with a velocity

Accepted Answer

$$\frac{{	ext{v}}}{2}$$

Answer

$${	ext{v}}$$

Answer

$$\frac{{	ext{v}}}{4}$$

Answer

$$\frac{{	ext{v}}}{8}$$

Question 5

A single force and a couple acting in the same plane upon a rigid body

Accepted Answer

Cannot balance each other

Answer

Balance each other

Answer

Produce moment of a couple

Answer

Are equivalent

Question 6

Tangent of angle of friction is equal to

Accepted Answer

Coefficient of friction

Answer

Kinetic friction

Answer

Limiting friction

Answer

Angle of repose

Question 7

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

Accepted Answer

Nine times

Answer

Six times

Answer

Four times

Answer

Two times

Question 8

The periodic time (T) is given by (where, $$\omega $$ = Angular velocity of particle in rad/s.)

Accepted Answer

$$\frac{{2\pi }}{\omega }$$

Answer

$$\frac{\omega }{{2\pi }}$$

Answer

$$2\pi 	imes \omega $$

Answer

$$\frac{\pi }{\omega }$$

Question 9

Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

Accepted Answer

$$\frac{{{	ext{b}}{{	ext{h}}^3}}}{{12}}$$

Answer

$$\frac{{{	ext{b}}{{	ext{h}}^3}}}{4}$$

Answer

$$\frac{{{	ext{b}}{{	ext{h}}^3}}}{8}$$

Answer

$$\frac{{{	ext{b}}{{	ext{h}}^3}}}{{36}}$$