The unit of work or energy in S.I. units is

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The unit of work or energy in S.I. units is

A. Newton

B. Pascal

C. Watt

D. Joule

Correct Answer :

D. Joule

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In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively

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The unit of energy in S.I. units is

A. Dyne

B. Watt

C. kg-m

D. Joule

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If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

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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

A. P + Q

B. P - Q

C. P / Q

D. Q / P

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Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

A. bh³/4

B. bh³/8

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The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction.)

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When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.

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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 width (b), is

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Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

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The unit of angular velocity is

A. m/min

B. rad/s

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Which of the following is a vector quantity?

A. Energy

B. Mass

D. Angle

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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

D. Circle

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Kinetic friction is the

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The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

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

A. Inward

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The ratio of limiting friction and normal reaction is known as

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Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

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Which one of the following statements is not correct?

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A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is μ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will

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The range of a projectile is maximum, when the angle of projection is

A. 30°

B. 45°

C. 60°

D. 90°

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

A. L/2

B. L/3

C. 3L/4

D. 2L/3

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The process of finding out the resultant force is called __________ of forces.

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Lami's theorem states that

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In ideal machines

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The unit of work or energy in S.I. units is

A. Newton

B. Pascal

C. Watt

D. Joule

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The time of flight (t) of a projectile on an upward inclined plane is (where u = Velocity of projection, α = Angle of projection, and β = Inclination of the plane with the horizontal.)

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The moment of a force

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If two bodies having masses m₁ and m₂ (m₁>m₂) have equal kinetic energies, the momentum of body having mass m₁ is _________ the momentum of body having mass m₂.

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The rate of doing work is known as

C. Power

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In order to completely specify angular displacement by a vector, it must fix

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Answer 1

A. √3. W (tensile) and 2W (compressive)

Answer 2

B. 2W (tensile) and √3. W (compressive)

Answer 3

C. 2√3. W (tensile) and 2√3. W (compressive)

Answer 4

D. None of the above

Answer 5

A. (v₁ - v₂)/(u₁ - u₂)

Answer 6

B. (v₂ - v₁)/(u₁ - u₂)

Answer 7

C. (u₁ - u₂)/(v₁ - v₂)

Answer 8

D. (u₂ + u₁)/(v₂ + v₁)

Answer 9

C. bh³/12

Answer 10

D. bh³/36

Answer 11

A. α = 45° + φ/2

Answer 12

B. α = 45° - φ/2

Answer 13

C. α = 90° + φ

Answer 14

D. α = 90° - φ

Answer 15

A. Directly proportional

Answer 16

B. Inversely proportional

Answer 17

C. Cube root

Answer 18

D. None of these

Answer 19

A. db³/12

Answer 20

B. bd³/12

Answer 21

C. db³/36

Answer 22

D. bd³/36

Answer 23

A. (2/3) Ml²

Answer 24

B. (1/3) Ml²

Answer 25

C. (3/4) Ml²

Answer 26

D. (1/12) Ml²

Answer 27

C. Revolutions/min

Answer 28

D. Both (B) and (C)

Answer 29

C. Momentum

Answer 30

A. Ellipse

Answer 31

B. Hyperbola

Answer 32

C. Parabola

Answer 33

A. Tangent of angle between normal reaction and the resultant of normal reaction and the limiting friction

Answer 34

B. Ratio of limiting friction and normal reaction

Answer 35

C. The friction force acting when the body is just about to move

Answer 36

D. The friction force acting when the body is in motion

Answer 37

A. Same at every point on its line of action

Answer 38

B. Different at different points on its line of action

Answer 39

C. Minimum, if it acts at the centre of gravity of the body

Answer 40

D. Maximum, if it acts at the centre of gravity of the body

Answer 41

B. Outward

Answer 42

C. Towards front

Answer 43

D. Towards back

Answer 44

A. Coefficient of friction

Answer 45

B. Angle of friction

Answer 46

C. Angle of repose

Answer 47

D. Sliding friction

Answer 48

A. Nine times

Answer 49

B. Six times

Answer 50

C. Four times

Answer 51

D. Two times

Answer 52

A. The tangent of the angle of friction is equal to coefficient of friction

Answer 53

B. The angle of repose is equal to angle of friction

Answer 54

C. The tangent of the angle of repose is equal to coefficient of friction

Answer 55

D. The sine of the angle of repose is equal to coefficient to friction

Answer 56

A. Remain horizontal

Answer 57

B. Slant up towards direction of pull

Answer 58

C. Slant down towards direction of pull

Answer 59

D. None of the above

Answer 60

A. Composition

Answer 61

B. Resolution

Answer 62

C. Decomposition

Answer 63

D. None of these

Answer 64

A. Three forces acting at a point will be in equilibrium

Answer 65

B. Three forces acting at a point can be represented by a triangle, each side being proportional to force

Answer 66

C. If three forces acting upon a particle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

Answer 67

D. If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

Answer 68

A. Mechanical advantage is greater than velocity ratio

Answer 69

B. Mechanical advantage is equal to velocity ratio

Answer 70

C. Mechanical advantage is less than velocity ratio

Answer 71

D. Mechanical advantage is unity

Answer 72

A. t = g cos β/2u sin (α - β)

Answer 73

B. t = 2u sin (α - β)/g cos β

Answer 74

C. t = g cos β/2u sin (α + β)

Answer 75

D. t = 2u sin (α + β)/g cos β

Answer 76

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

Answer 77

B. 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

Answer 78

C. 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

Answer 79

D. All of the above

Answer 80

A. Equal to

Answer 81

B. Less than

Answer 82

C. Greater than

Answer 83

D. None of these

Answer 84

A. Potential energy

Answer 85

B. Kinetic energy

Answer 86

D. None of these

Answer 87

A. Direction of the axis of rotation

Answer 88

B. Magnitude of angular displacement

Answer 89

C. Sense of angular displacement

Answer 90

D. All of these

The unit of work or energy in S.I. units is

Correct Answer :

Show all Engineering Mechanics MCQ

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In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively

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If u₁ and u₂ are the velocities of two moving bodies in the same direction before impact and v₁ and v₂ are their velocities after impact, then coefficient of restitution is given by

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

Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

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Lami's theorem states that

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The unit of work or energy in S.I. units is

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The unit of work or energy in S.I. units is

Correct Answer :

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In a framed structure, as shown in the below figure, the forces in the members AB and BC are respectively

The unit of energy in S.I. units is

If u1 and u2 are the velocities of two moving bodies in the same direction before impact and v1 and v2 are their velocities after impact, then coefficient of restitution is given by

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

Moment of inertia of a triangular section of base (b) and height (h) about an axis through its base, is

The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction.)

When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.

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 width (b), is

Mass moment of inertia of a uniform thin rod of mass M and length (l) about its mid-point and perpendicular to its length is

The unit of angular velocity is

Which of the following is a vector quantity?

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

Kinetic friction is the

The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

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

The ratio of limiting friction and normal reaction is known as

Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its vertex and parallel to the base, is __________ than that passing through its C.G. and parallel to the base.

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The range of a projectile is maximum, when the angle of projection is

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The process of finding out the resultant force is called __________ of forces.

Lami's theorem states that

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