ENGINEERING MECHANICS QUIZ

In actual machines, mechanical advantage is _________ velocity ratio.

None of these

Equal to

Less than

Greater than

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

(1/2π). √(l/g)

(1/2π). √(g/l)

2π. √(l/g)

TRUE ANSWER : ?
YOUR ANSWER : ?

The force applied on a body of mass 100 kg to produce an acceleration of 5 m/s2, is

100 N

None of these

20 N

500 N

TRUE ANSWER : ?
YOUR ANSWER : ?

A rubber ball is dropped from a height of 2 m. If there is no loss of velocity after rebounding, the ball will rise to a height of

3 m

4 m

2 m

1 m

TRUE ANSWER : ?
YOUR ANSWER : ?

The unit of work in S.I. units is

erg

kg-m

Newton

joule

TRUE ANSWER : ?
YOUR ANSWER : ?

If a number of forces are acting at a point, their resultant will be inclined at an angle 'θ' with the horizontal, such that

tanθ = √(ΣV + ΣH)

tanθ = ΣV × ΣH

tanθ = ΣV/ΣH

tanθ = ΣH/ΣV

TRUE ANSWER : ?
YOUR ANSWER : ?

When the spring of a watch is wound, it will possess

Heat energy

Strain energy

Kinetic energy

Electrical energy

TRUE ANSWER : ?
YOUR ANSWER : ?

Work done is said to be zero, when

No force acts on a body but some displacement takes place

Either (A) or (B)

None of these

Some force acts on a body, but displacement is zero

TRUE ANSWER : ?
YOUR ANSWER : ?

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

0.8 r

0.6 r

0.7 r

0.5 r

TRUE ANSWER : ?
YOUR ANSWER : ?

The moment of a force

Is equal to the product of force acting on the body and the perpendicular distance of a point and the line of action of the force

Is equal to twice the area of the triangle, whose base is the line representing the force and whose vertex is the point, about which the moment is taken

Is the turning effect produced by a force, on the body, on which it acts

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?