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Current Affairs January 2024

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4

In the lever of third order, load W, effort P and fulcrum F are oriented as follows

A. W between P and F

B. F between W and P

C. P between W and F

D. W, P and F all on one side

Correct Answer :

A. W between P and F


Related Questions

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4

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 depth (d), is

A. db3/12

B. bd³/12

C. db³/36

D. bd³/36

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4

The coefficient of friction depends on

A. Area of contact

B. Shape of surfaces

C. Strength of surfaces

D. Nature of surface

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4

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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4

Which of the following is not a vector quantity?

A. Weight

B. Velocity

C. Acceleration

D. Force

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4

Which of the following is not the unit of energy?

A. kg m

B. kcal

C. Watt

D. Watt hours

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4

The impact between two lead spheres is approximately equal to an __________ impact.

A. Elastic

B. Inelastic

C. Solid

D. None of these

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4

From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the centre of circular plate

A. 0.5 cm

B. 1.0 cm

C. 1.5 cm

D. 2.5 cm

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4

The centre of gravity of a uniform lamina lies at

A. The centre of heavy portion

B. The bottom surface

C. The midpoint of its axis

D. All of the above

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4

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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4

The moment of inertia of a thin rod of mass m and length l, about an axis through its centre of gravity and perpendicular to its length is

A. ml2/4

B. ml2/ 6

C. ml2/8

D. ml2/12

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4

If the masses of both the bodies, as shown in the below figure, are reduced to 50 percent, then tension in the string will be

A. Same

B. Half

C. Double

D. None of these

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4

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

A. Same at every point on its line of action

B. Different at different points on its line of action

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

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

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4

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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4

The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction in which the force acts. This statement is known as

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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4

The unit of force in S.I. system of units is

A. Dyne

B. Kilogram

C. Newton

D. Watt

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4

The total motion possessed by a body, is called

A. Impulsive force

B. Mass

C. Weight

D. Momentum

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4

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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4

A differential pulley block has larger and smaller diameters of 100 mm and 80 mm respectively. Its velocity ratio is

A. 5

B. 10

C. 20

D. 40

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4

The equivalent length of a simple pendulum which gives the same frequency as compound pendulum is

A. h/(kG² + h²)

B. (kG² + h²)/h

C. h²/(kG² + h²)

D. (kG² + h²)/h²

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4

Non-coplanar concurrent forces are those forces which

A. Meet at one point, but their lines of action do not lie on the same plane

B. Do not meet at one point and their lines of action do not lie on the same plane

C. Meet at one point and their lines of action also lie on the same plane

D. Do not meet at one point, but their lines of action lie on the same plane

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4

Angle of friction is the

A. Angle between normal reaction and the resultant of normal reaction and the limiting friction

B. Ratio of limiting friction and normal reaction

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

D. The ratio of minimum friction force to friction force acting when the body is in motion

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4

The rate of change of displacement of a body is called

A. Velocity

B. Acceleration

C. Momentum

D. None of these

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4

The maximum velocity of a particle moving with simple harmonic motion is

A. ω

B. ωr

C. ω2r

D. ω/r

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4

The minimum force required to slide a body of weight W on a rough horizontal plane is

A. W sinθ

B. W cosθ

C. W tanθ

D. None of these

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4

The velocity of a body on reaching the ground from a height h, is

A. 2.√(gh)

B. √(gh)

C. √(2gh)

D. 2g.√h

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4

The moment of inertia of a solid sphere of mass m and radius r is

A. 2mr2/3

B. 2mr2/5

C. mr2

D. mr2/2

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4

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

A. (2/3) Ml2

B. (1/3) Ml2

C. (3/4) Ml2

D. (1/12) Ml2

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4

The maximum height of a projectile on a horizontal plane, is

A. u² sin²α/2g

B. u² cos²α/2g

C. u² sin²α/g

D. u² cos²α/g

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4

Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

A. Upwards

B. Downwards

C. Horizontal

D. None of these

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4

The velocity ratio of a first system of pulleys with 4 pulleys is

A. 4

B. 8

C. 16

D. 20