Engineering Mechanics MCQs

Question 1

A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to

Accepted Answer

50

Answer

25

Answer

100

Answer

250

Question 2

Which of the following is a scalar quantity?

Accepted Answer

Speed

Answer

Force

Answer

Velocity

Answer

Acceleration

Question 3

Which of the following is a vector quantity?

Accepted Answer

Momentum

Answer

Energy

Answer

Mass

Answer

Angle

Question 4

Which of the following statement is correct?

Accepted Answer

The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation

Answer

The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity

Answer

The velocity of the particle moving with simple harmonic motion is zero at the mean position

Answer

The acceleration of the particle moving with simple harmonic motion is maximum at the mean position

Question 5

Which of the following statement is correct?

Accepted Answer

The kinetic energy of a body before impact is more than the kinetic energy of a body after impact

Answer

The kinetic energy of a body during impact remains constant

Answer

The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact

Answer

The kinetic energy of a body before impact is less than the kinetic energy of a body after impact

Question 6

Which of the following statement is correct?

Accepted Answer

All of the above

Answer

The algebraic sum of the forces, constituting the couple is zero

Answer

The algebraic sum of the forces, constituting the couple, about any point is the same

Answer

A couple cannot be balanced by a single force but can be balanced only by a couple of opposite sense

Question 7

In a framed structure, as shown in the below figure, the force in the member BC is

Accepted Answer

$$\frac{{2{	ext{W}}}}{{\sqrt 3 }}$$ (tension)

Answer

$$\frac{{	ext{W}}}{{\sqrt 3 }}$$ (compression)

Answer

$$\frac{{	ext{W}}}{{\sqrt 3 }}$$ (tension)

Answer

$$\frac{{2{	ext{W}}}}{{\sqrt 3 }}$$ (compression)

Question 8

The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

Accepted Answer

Minimum, if it acts at the center of gravity of the body

Answer

Same at every point on its line of action

Answer

Different at different points on its line of action

Answer

Maximum, if it acts at the center of gravity of the body

Question 9

The process of finding out the resultant force is called __________ of forces.

Accepted Answer

Composition

Answer

Resolution

Answer

Decomposition

Answer

None of these