STRENGTH OF MATERIALS QUIZ

Forces are called coplanar when all of them acting on body lie in

one plane

one point

perpendicular planes

different planes

TRUE ANSWER : ?
YOUR ANSWER : ?

The center of percussion of the homogeneous rod of length L suspended at the top will be

2L/3

L/3

L/2

3L/4

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YOUR ANSWER : ?

A cable with a uniformly distributed load per horizontal metre run will take the following shape

Parabola

Hyperbola

Elliptical

Straight line

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YOUR ANSWER : ?

The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be

2r/3

3r/2

r/2

r/A

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YOUR ANSWER : ?

Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one

parabola

hyperbola

circle

ellipse

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YOUR ANSWER : ?

In actual machines

mechanical advantage is less than velocity ratio

mechanical advantage is equal to velocity ratio

mechanical advantage is greater than velocity ratio

mechanical advantage is unity

TRUE ANSWER : ?
YOUR ANSWER : ?

Coefficient of friction is the

ratio of limiting friction and normal reaction

the friction force acting when the body is in motion

angle between normal reaction and the resultant of normal reaction and the limiting friction

the friction force acting when the body is just about to move

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YOUR ANSWER : ?

The center of gravity of a uniform lamina lies at

the center of heavy portion

the bottom surface

the mid point of its axis

All of these

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YOUR ANSWER : ?

A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

metal is twice as dense as water

metal will float in water

density of metal can’t be determined

metal is twice as dense as unknown fluid

TRUE ANSWER : ?
YOUR ANSWER : ?

The effort required to lift a load W on a screw jack with helix angle a and angle of friction

Wsin(a + <(>)

Wtan(a-<)>)

Wtan(a + <)>)

Wcos(a + )

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YOUR ANSWER : ?