Engineering Mechanics Mcqs

This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Engineering Mechanics ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Engineering Mechanics comprehensively.

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16.
In ideal machines__________________?

Mechanical advantage is greater than velocity ratio

Mechanical advantage is equal to velocity ratio

Mechanical advantage is less than velocity ratio

Mechanical advantage is unity

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17.
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of_______________?

Friction

Limiting friction

Repose

Kinematic friction

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18.
The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is__________________?

Same

Double

Half

Four times

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19.
The C.G. of a plane lamina will not be at its geometrical centre in the case of a__________________?

Right angled triangle

Equilateral triangle

Square

Circle

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20.
The C.G. of a right circular solid cone of height h lies at the following distance from the base______________?

H/2

J/3

H/6

H/4

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21.
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_________________?

Density of metal can’t be determined

Metal is twice as dense as water

Metal will float in water

Metal is twice as dense as unknown fluid

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23.
The C.G. of a solid hemisphere lies on the central radius 3r________________?

At distance — from the plane base 3r

At distance — from the plane base 3r

At distance — from the plane base 3r

At distance — from the plane base or

at distance — from the plane base

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24.
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___________________?

Ellipse

Hyperbola

Parabola

Circle

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25.
A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_________________?

38 m

62.5 m

96 m

124 m

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26.
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to___________________?

25

50

100

250

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27.
If n = number of members andy = number of joints, then for a perfect frame, n =_________________?

J-2

2j-l

2/-3

3/-2

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28.
The co-efficient of friction depends upon_______________?

Nature of surfaces

Area of contact

Shape of the surfaces

Ail of the above.

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29.
A single force and a couple acting in the same plane upon a rigid body_____________________?

Balance each other

Cannot balance each other

Produce moment of a couple

Are equivalent

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30.
The maximum frictional force which comes into play when a body just begins to slide over another surface is called__________________?

Limiting friction

Sliding friction

Rolling friction

Kinematic friction

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