Engineering Mechanics MCQs

Question 1

In actual machines, mechanical advantage is _________ velocity ratio.

Accepted Answer

Less than

Answer

Equal to

Answer

Greater than

Answer

None of these

Question 2

Whenever a force acts on a body and the body undergoes a displacement, then

Accepted Answer

Work is said to be done

Answer

Power is being transmitted

Answer

Body has kinetic energy of translation

Answer

None of these

Question 3

Which of the following is not a scalar quantity?

Accepted Answer

Acceleration

Answer

Mass

Answer

Volume

Answer

Density

Question 4

Which of the following is not a vector quantity?

Accepted Answer

Weight

Answer

Velocity

Answer

Acceleration

Answer

Force

Question 5

Which of the following is not the unit of power?

Accepted Answer

kcal/kg sec

Answer

kW (kilowatt)

Answer

hp (horse power)

Answer

kcal/sec

Question 6

Pick up wrong statement about friction force for dry surfaces. Friction force is

Accepted Answer

Proportional to velocity of sliding

Answer

Proportional to normal load between the surfaces

Answer

Dependent on the materials of contact surface

Answer

Independent of the area of contact surfaces

Question 7

A body will begin to move down an inclined plane if the angle of inclination of the plane is _________ the angle of friction.

Accepted Answer

Greater than

Answer

Equal to

Answer

Less than

Answer

None of these

Question 8

The center of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

Accepted Answer

$$\frac{{4{	ext{r}}}}{{3\pi }}$$

Answer

$$\frac{{3{	ext{r}}}}{8}$$

Answer

$$\frac{{8{	ext{r}}}}{3}$$

Answer

$$\frac{{3{	ext{r}}}}{{4\pi }}$$

Question 9

The rate of change of displacement of a body is called

Accepted Answer

Velocity

Answer

Acceleration

Answer

Momentum

Answer

None of these