ENGINEERING MECHANICS QUIZ

Coplanar non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.

Do not meet

Either ‘A’ or ‘B’

None of these

Meet

TRUE ANSWER : ?
YOUR ANSWER : ?

If rain is falling in the opposite direction of the movement of a pedestrian, he has to hold his umbrella

Less inclined when moving

More inclined when standing

Less inclined when standing

More inclined when moving

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of angular velocity is

Revolutions/min

m/min

Both (B) and (C)

rad/s

TRUE ANSWER : ?
YOUR ANSWER : ?

Centre of gravity of a solid cone lies on the axis at the height

One third of the total height above base

Three eighth of the total height above the base

One-half of the total height above base

One fourth of the total height above base

TRUE ANSWER : ?
YOUR ANSWER : ?

A screw jack used for lifting the loads is

A reversible machine

None of these

An ideal machine

A non-reversible machine

TRUE ANSWER : ?
YOUR ANSWER : ?

Coplanar concurrent forces are those forces which

Do not meet at one point and their lines of action do not lie on the same plane

Meet at one point and their lines of action also lie on the same plane

Meet at one point, but their lines of action do not lie on the same plane

Do not meet at one point, but their lines of action lie on the same plane

TRUE ANSWER : ?
YOUR ANSWER : ?

The acceleration of a particle moving with simple harmonic motion is __________ at the mean position.

Maximum

None of these

Zero

Minimum

TRUE ANSWER : ?
YOUR ANSWER : ?

Moment of inertia of a rectangular section having width (b) and depth (d) about an axis passing through its C.G. and parallel to the depth (d), is

bd³/36

db³/36

bd³/12

db³/12

TRUE ANSWER : ?
YOUR ANSWER : ?

One joule means that

Work is done by a force of 1 g when it displaces a body through 1 cm

Work is done by a force of 1 dyne when it displaces a body through 1 cm

Work is done by a force of 1 kg when it displaces a body through 1 m

Work is done by a force of 1 N when it displaces a body through 1 m

TRUE ANSWER : ?
YOUR ANSWER : ?

The velocity of a particle (v) moving with simple harmonic motion, at any instant is given by (where, r = Amplitude of motion, and y = Displacement of the particle from mean position.)

ω².√(r² - y²)

ω.√(r² - y²)

ω².√(y² - r²)

ω.√(y² - r²)

TRUE ANSWER : ?
YOUR ANSWER : ?