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This mock test of Test: Engineering Mechanics - 7 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam.
This contains 25 Multiple Choice Questions for Mechanical Engineering Test: Engineering Mechanics - 7 (mcq) to study with solutions a complete question bank.
The solved questions answers in this Test: Engineering Mechanics - 7 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering
students definitely take this Test: Engineering Mechanics - 7 exercise for a better result in the exam. You can find other Test: Engineering Mechanics - 7 extra questions,
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QUESTION: 1

Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

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QUESTION: 2

If tension in the cable supporting a lift moving downwards is half the tension when it is moving upwards, the acceleration of the lift is

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QUESTION: 3

Efficiency of a screw jack is given by(where α = Helix angle, and φ = Angle of friction.)

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QUESTION: 4

When a train is rounding a curve, the side thrust on the wheel flanges is prevented by raising the outer edge of the rail.

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QUESTION: 5

Frequency of vibrations means the number of cycles per second.

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QUESTION: 6

The time of flight (*t*) of a projectile on a horizontal plane is given by

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QUESTION: 7

The velocity ratio for the third system of pulleys is

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QUESTION: 8

The moment of inertia of a thin spherical shell of mass *m* and radius *r*, about its diameter is

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QUESTION: 9

If the gravitational acceleration at any place is doubled, then the weight of a body will be

Solution:

**Correct Answer :- d**

**Explanation : **Weight = density * acceleration

If the gravitational acceleration at any place is doubled, then the weight of a body will be doubled.

QUESTION: 10

The resultant of two forces *P* and *Q* (such that *P* > *Q*) acting along the same straight line, but in opposite direction, is given by

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QUESTION: 11

The velocity ratio for the second system of pulleys is *n*.

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QUESTION: 12

The law of motion involved in the recoil of gun is

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QUESTION: 13

When a particle moves along a circular path, its acceleration has two components, one is normal component and the other is tangential component of acceleration.

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QUESTION: 14

A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.

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QUESTION: 15

The range of projectile will be maximum for a given velocity of projectile, when the angle of projection (α) is

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QUESTION: 16

When two elastic bodies collide with each other,

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QUESTION: 17

In order to double the period of simple pendulum, the length of the string should be

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QUESTION: 18

The centre of gravity of a triangle lies at a point where its medians intersect each other.

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QUESTION: 19

The moment of inertia of a square of side *a* about its base is *a*^{4}/ 3.

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QUESTION: 20

If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys

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QUESTION: 21

The centre of gravity of a right angled triangle lies at its geometrical centre.

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QUESTION: 22

Vectors method for the resultant force is also called polygon law of forces.

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QUESTION: 23

Two equal and opposite parallel forces whose lines of action are different form a couple.

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QUESTION: 24

When a person, on a bicycle, drives round a curve, he has to lean __________ to maintain equilibrium.

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QUESTION: 25

A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The centre of gravity of the section will lie

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