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What is the correct answer?

4

The reaction at the central support B of the beam ABC hinged at D shown in below figure is

A. 2 t

B. 5.8 t

C. 0.2 t

D. 3.5 t

Correct Answer :

B. 5.8 t


Related Questions

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4

Free body diagram is an

A. Isolated joint with only body forces acting on it

B. Isolated joint with internal forces acting on it

C. Isolated joint with all the forces, internal as well as external, acting on it

D. None of the above

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4

If the resultant of two forces P and Q acting at an angle θ makes an angle α with P, then tan α equals

A. P sin θ/P - Q cos θ

B. Q sin θ/P + Q cos θ

C. P sin θ/P + Q tan θ

D. Q sin θ/P + Q sin θ

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4

The condition of equilibrium for any system of forces in a plane is

A. That polygon of forces must close

B. That resultant couple must be zero

C. Both (A) and (B)

D. None of the above

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4

Pick up the correct statement from the following:

A. If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities

B. If a sphere impinges directly on an equal sphere which is at rest, then a fraction ½(1 - e2) the original kinetic energy is lost by the impact

C. If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles

D. All the above

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4

If a body is acted upon by a number of coplanar non-concurrent forces, it may

A. Rotate about itself without moving

B. Move in any one direction

C. Move in any one direction rotating about itself

D. All the above

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4

The reaction at the support B of the beam shown in below figure is

A. 1.6 t

B. 9.6 t

C. 8.5 t

D. 0.5 t

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4

Parallelogram Law of Forces states, if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by

A. Its longer side

B. Its shorter side

C. The diagonal of the parallelogram which does not pass through the point of intersection of the forces

D. The diagonal of the parallelogram which passes through the point of intersection of the forces

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4

Power developed by a torque, is

A. 2πNT kg m/min

B. 2πNT/4500 h.p

C. 2πNT /60 watts

D. All the above

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4

A sphere and a cylinder having the same mass and radii start from rest and roll down the same inclined plane. Which body gets to the bottom first?

A. Sphere with greater rotational energy at bottom than cylinder

B. Sphere with lesser rotational energy at bottom than cylinder

C. Cylinder with greater rotational energy at bottom than sphere

D. Both reach the bottom simultaneously with equal rotational energy at bottom

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4

The load shared by the member BC of the structure shown in below figure is

A. 23 t

B. 32 t

C. 4 t

D. 3 t

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4

A stone of mass 1 kg is tied to a string of length 1 m and whirled in a horizontal circle at a constant angular speed 5 rad/sec. The tension in the string is,

A. 5 N

B. 10 N

C. 15 N

D. 25 N

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4

The graphical method of determining the forces in the members of a truss is based on

A. Method of joint

B. Method of section

C. Either method

D. None of the two methods

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4

A cable loaded with 10 kN/m of span is stretched between supports in the same horizontal line 100 m apart. If the central dip is 10 m, then the maximum and minimum pull in the cable respectively are

A. 1346.3 kN and 1500 kN

B. 1436.2 kN and 1250 kN

C. 1346.3 kN and 1250 kN

D. 1436.2 kN and 1500 kN

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4

Pick up the correct statement from the following for the structure shown in below figure.

A. The horizontal reaction at A is 2 √3t ←

B. The horizontal reaction at C is 2 √3t →

C. The vertical reaction at A is zero

D. All the above

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4

For a particle moving with a simple harmonic motion, the frequency is

A. Directly proportional to periodic time

B. Inversely proportional to periodic time

C. Inversely proportional to its angular velocity

D. Directly proportional to its angular velocity

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4

A uniform pyramid and a uniform prism of same height lie with their base on the surface. Which is more stable?

A. Pyramid

B. Prism

C. Both equally stable

D. None of the above

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4

Joule is the unit of

A. Work

B. Force

C. Power

D. Torque

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4

A geo-stationary satellite is one which orbits the earth with a velocity of rotation of

A. Moon

B. Earth

C. Sun

D. Pole

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4

The apparent weight of a man in a moving lift is less than his real weight when it is going down with

A. Uniform speed

B. An acceleration

C. Linear momentum

D. Retardation

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4

For a given velocity of a projectile, the range is maximum when the angle of projection is

A. 30°

B. 45°

C. 90°

D.

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4

A hoop of radius 3 m weighs 100 kg. It rolls along a horizontal floor so that at its centre of mass has a speed of 200 mm/sec. The work required to stop the hoop is

A. 2 J

B. 4 J

C. 6 J

D. 8 J

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4

Two circular discs of same weight and thickness are made from metals having different densities. Which disc will have the larger rotational inertia about its central axis?

A. Disc with larger density

B. Disc with smaller density

C. Both discs will have same rotational inertia

D. None of the above

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4

A ball is dropped from a height of 2.25 m on a smooth floor and rises to a height of 1.00 m after the bounce. The coefficient of restitution between the ball and the floor is

A. 0.33

B. 0.44

C. 0.57

D. 0.67

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4

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

A. v = 2gh

B. v = 2gh2

C. v = √(2gh)

D. v = 1/√(2gh)

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4

A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about (Assume g = 10 m/sec²)

A. 1/4

B. 1/3

C. 1/2

D. 1/5

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4

A system of coplanar forces is in equilibrium when

A. Force polygon closes

B. Funicular polygon closes

C. Both force polygon and funicular polygon close

D. All the forces are concurrent

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4

The resultant of two forces acting at right angles is √34 kg and acting at 60° is 70 kg. The forces are

A. 1 kg and 4 kg

B. 2 kg and 3 kg

C. √3 kg and √5 kg

D. 3 kg and 5 kg

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4

The horizontal reaction at the support A of the structure shown in below figure, is

A. Zero

B. 2 t

C. 3 t

D. 1 t

What is the correct answer?

4

The reaction RB of the roller support B of the beam shown in below figure is

A. 10.8 t

B. 10.6 t

C. 10.4 t

D. 10.2 t

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4

In the structure shown in below figure, the member which carries zero force, is

A. AB

B. BC

C. BE

D. All the above