Engineering Mechanics MCQs

Question 1

The ratio of static friction to dynamic friction is always

Accepted Answer

Greater than one

Answer

Equal to one

Answer

Less than one

Answer

None of these

Question 2

If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be

Accepted Answer

Zero

Answer

Maximum

Answer

Minimum

Answer

Infinity

Question 3

Which of the following statement is correct in connection with projectiles?

Accepted Answer

All of the above

Answer

A path, traced by a projectile in the space, is known as trajectory.

Answer

The velocity, with which a projectile is projected, is known as the velocity of projection.

Answer

The angle, with the horizontal, at which a projectile is projected, is known as angle of projection.

Question 4

The periodic time of one oscillation for a simple pendulum is (where $$l$$ = Length of the pendulum.)

Accepted Answer

$$2\pi \sqrt {\frac{l}{{	ext{g}}}} $$

Answer

$$\frac{1}{{2\pi }}\sqrt {\frac{l}{{	ext{g}}}} $$

Answer

$$\frac{1}{{2\pi }}\sqrt {\frac{{	ext{g}}}{l}} $$

Answer

None of these

Question 5

The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

Accepted Answer

2n

Answer

n

Answer

n2

Answer

2n - 1

Question 6

Static friction is always __________ dynamic friction.

Accepted Answer

Greater than

Answer

Equal to

Answer

Less than

Answer

None of these

Question 7

The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of

Accepted Answer

0.6 r

Answer

0.5 r

Answer

0.7 r

Answer

0.8 r

Question 8

The C.G. of a plane lamina will not be at its geometrical centre in the case of a

Accepted Answer

Right angled triangle

Answer

Equilateral triangle

Answer

Square

Answer

Circle

Question 9

A framed structure is imperfect, if the numbers of members are __________ (2j - 3).

Accepted Answer

Either (B) or (C)

Answer

Equal to

Answer

Less than

Answer

Greater than