Engineering Mechanics MCQs

Question 1

Which of the following is an example of a body undergoing translational equilibrium

Accepted Answer

A body at rest on a table

Answer

A body traveling in a circular path at a constant speed

Answer

A body rotating with a constant angular speed about an axis

Answer

A body sliding down a friction less inclined plane

Question 2

The frequency of a vibrating string is

Accepted Answer

Inversely proportional to the square root of the mass parameter for unit length.

Answer

Directly proportional to square of the tension

Answer

Inversely proportional to the diameter of the string

Answer

Directly proportional to the square root of the mass per unit length

Question 3

When two systems are in resonance, then the following parameter for both is equal

Accepted Answer

Frequency

Answer

Amplitude

Answer

Wavelength

Answer

Intensity

Question 4

If a system in equilibrium consists of six equal concurrent coplanar forces, each force acting in a different direction, then the angle between any pair of fordes is

Accepted Answer

60°

Answer

30°

Answer

45°

Answer

75°

Question 5

Choose the correct statement

Accepted Answer

No work gets done on it when it moves with a constant speed along a circle

Answer

No acceleration is produced in the body when it moves with a constant speed along a circle

Answer

No force acts on the body when the body moves with a constant speed along a circle

Answer

Its velocity remains constant when the body moves with a constant speed along a circle

Question 6

A bucket of water weighing 10 kg is pulled up from a well 20 metre deep by a rope weighing 1 kg/m length, then the work done is

Accepted Answer

400 kg-m

Answer

200 kg-m

Answer

500 kg-m

Answer

600 kg-m

Question 7

A ship will sink if it does not displace water equal to its own

Accepted Answer

Weight

Answer

Volume

Answer

Density

Answer

Surface area

Question 8

If the momentum of a given particle is doubled then its kinetic energy will

Accepted Answer

Be quadrupled

Answer

Be halved

Answer

Be doubled

Answer

Be same

Question 9

The atmosphere of earth is retained due to

Accepted Answer

Mean speed of molecules being much less than the escape velocity

Answer

Gravitational pull of earth

Answer

As a result of cohesion, adhesion, osmosis etc.

Answer

Spherical shape of earth