In ideal machines, mechanical advantage is __________ velocity ratio.

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In ideal machines, mechanical advantage is __________ velocity ratio.

A. Equal to

B. Less than

C. Greater than

D. None of these

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

A. t = 2u. sinα/g

B. t = 2u. cosα/g

C. t = 2u. tanα/g

D. t = 2u/g.sinα

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Which one of the following statements is not correct?

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

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

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

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

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The angle between two forces when the resultant is maximum and minimum respectively are:

A. 0° and 180°

B. 180° and 0°

C. 90° and 180°

D. 90° and 0°

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

A. One point

B. One plane

C. Different planes

D. Perpendicular planes

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The law of motion involved in the recoil of gun is

A. Newton's first law of motion

B. Newton's second law of motion

C. Newton's third law of motion

D. None of these

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A force is completely defined when we specify

A. Magnitude

B. Direction

C. Point of application

D. All of the above

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Which of the following is a vector quantity?

A. Energy

B. Mass

C. Momentum

D. Angle

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The unit of work in S.I. units is

A. Newton

B. erg

C. kg-m

D. joule

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

A. Same

B. Double

C. Half

D. Four times

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If n = number of members and y = number of joints, then for a perfect frame, n = ?

A. 1/2

B. 2/3

C. 3/2

D. 2/4

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Work done is said to be zero, when

A. Some force acts on a body, but displacement is zero

B. No force acts on a body but some displacement takes place

C. Either (A) or (B)

D. None of the above

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The matter contained in a body, is called

A. Impulsive force

B. Mass

C. Weight

D. Momentum

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The slope on the road surface generally provided on the curves is known as

A. Angle of friction

B. Angle of repose

C. Angle of banking

D. None of these

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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.

A. Equal to

B. Less than

C. Greater than

D. None of these

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The units of moment of inertia of mass are

A. kg-m²

B. m²/kg.

C. kg/m²

D. kg/m

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A screw jack used for lifting the loads is

A. A reversible machine

B. A non-reversible machine

C. An ideal machine

D. None of these

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The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

A. sinθ

B. cosθ

C. tanθ

D. cosecθ

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In the shown figure, the tension (T) in the string will be

A. m₁. m₂. g/(m₁ + m₂)

B. 2m₁. m₂. g/(m₁ + m₂)

C. (m₁ + m₂)/ m₁. m₂. g

D. (m₁ + m₂)/2m₁. m₂. g

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The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

A. Less than

B. Greater than

C. Equal to

D. None of these

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A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

A. Downward at its upper end

B. Upward at its upper end

C. Zero at its upper end

D. Perpendicular to the wall at its upper end

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Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its midpoint

A. Same as

B. Twice

C. Thrice

D. Four times

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One joule is equal to

A. 0.1 N-m

B. 1 N-m

C. 10 N-m

D. 100 N-m

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

A. Right angled triangle

B. Equilateral triangle

C. Square

D. Circle

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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

A. Remain horizontal

B. Slant up towards direction of pull

C. Slant down towards direction of pull

D. None of the above

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A body of mass m moving with a constant velocity v strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

A. v

B. 2v

C. 4v

D. 8v

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Coulomb friction is the friction between

A. Bodies having relative motion

B. Two dry surfaces

C. Two lubricated surfaces

D. Solids and liquids

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A machine having an efficiency greater than 50%, is known as

A. Reversible machine

B. Non-reversible machine

C. Neither reversible nor non-reversible machine

D. Ideal machine

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The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

A. n

B. n²

C. 2n

D. 2n - 1

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If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

A. Equal to

B. Less than

C. Greater than

D. None of these

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The point, through which the whole weight of the body acts, irrespective of its position, is known as

A. Moment of inertia

B. Centre of gravity

C. Centre of percussion

D. Centre of mass

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Accepted Answer

A. Equal to

In ideal machines, mechanical advantage is __________ velocity ratio.

Correct Answer :

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Related Questions

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

Which one of the following statements is not correct?

The angle between two forces when the resultant is maximum and minimum respectively are:

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

The law of motion involved in the recoil of gun is

A force is completely defined when we specify

Which of the following is a vector quantity?

The unit of work in S.I. units is

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

If n = number of members and y = number of joints, then for a perfect frame, n = ?

Work done is said to be zero, when

The matter contained in a body, is called

The slope on the road surface generally provided on the curves is known as

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.

The units of moment of inertia of mass are

A screw jack used for lifting the loads is

The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

In the shown figure, the tension (T) in the string will be

The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its midpoint

One joule is equal to

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

A body of mass m moving with a constant velocity v strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

Coulomb friction is the friction between

A machine having an efficiency greater than 50%, is known as

The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

The point, through which the whole weight of the body acts, irrespective of its position, is known as

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In ideal machines, mechanical advantage is __________ velocity ratio.

Correct Answer :

Show all Engineering Mechanics MCQ

Related Questions

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

Which one of the following statements is not correct?

The angle between two forces when the resultant is maximum and minimum respectively are:

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

The law of motion involved in the recoil of gun is

A force is completely defined when we specify

Which of the following is a vector quantity?

The unit of work in S.I. units is

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

If n = number of members and y = number of joints, then for a perfect frame, n = ?

Work done is said to be zero, when

The matter contained in a body, is called

The slope on the road surface generally provided on the curves is known as

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.

The units of moment of inertia of mass are

A screw jack used for lifting the loads is

The velocity ratio in case of an inclined plane inclined at angle θ to the horizontal and weight being pulled up the inclined plane by vertical effort is

In the shown figure, the tension (T) in the string will be

The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.

A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act

Mass moment of inertia of a thin rod about its one end is __________ the mass moment of inertia of the same rod about its midpoint

One joule is equal to

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

A body of mass m moving with a constant velocity v strikes another body of same mass moving with same velocity but in opposite direction. The common velocity of both the bodies after collision is

Coulomb friction is the friction between

A machine having an efficiency greater than 50%, is known as

The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)

If a number of coplanar forces acting at a point be in equilibrium, the sum of clockwise moments must be __________ the sum of anticlockwise moments, about any point.

The point, through which the whole weight of the body acts, irrespective of its position, is known as

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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.