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This set of Applied Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Applied Mechanics Set 10
Q1 | For perfectly elastic bodies the value of the coefficient of restitution is
- 0.707
- 0.5
- 1
- 0.25
- Zero
Q2 | A satellite launch station should be
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- near the equatorial region
- all the locations are equally good
- one the polar axis
- near the polar region
Q3 | The direction of projection for the range of a projectile to be maximum on an inclined plane having angle of inclination 30? to the horizontal, whould be
- 45? with horizontal
- 30? with vertical
- 30? with horizontal
- 60? with inclined plane
- 45? with inclined plane
Q4 | If for power transmission a gear train consisting of 8 gears is used, then
- the motion of driver and follower will be in the same direction
- the motion of driver and follower will be in the opposite directions
- either of (A) or (B) above
- None of the above
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Q5 | A train travels between two stations 15 km, apart in 18 minutes. If the train accelerates for a part of journey uniformly followed by uniform relardation, the maximum speed attained by the train, during, the journey, will be
- 60 km/hr
- 80 km/hr
- 125 km/hr
- 100 km/hr
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Q6 | The tension T1 will be
- 5 N
- 20 N
- 60 N
- 10 N
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Q7 | A imaginary planet has half the mass and half the radius of the earth. The acceleration of gravity at its surface would be
- 9.8 m/s2
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- 4.9 m/s2
- 19.6 m/s2
- 2.45 m/s2
Q8 | The principle of conservation of energy cannot be applied in case of
- Flow of heat through a metal
- Ideal flow of water in a pipe
- Simple pendulum
- Sliding of a particle along inclined plane with friction
- A particle moving in gravitational field
Q9 | A truss element
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- resists lateral forces
- is a two-force body
- is a three force body
- resist forces in compression only
Q10 | Impulse can be obtained from
- force-time diagram
- velocity-time diagram
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- force displacement diagram
- velocity-displacement diagram
Q11 | A mass of 5 kg moves on a smooth horizontal plane with a speed of 8 m/s attached to a fixed point on the plane by a string of length 4m. Tension in the string is
- 785
- 80N
- 392.4N
- None of the above
- Tapered bearing
Q12 | The area under stress-strain curve represents
- Hardness of material
- Breaking strength of the material
- Energy required to cause failure
- Toughness of material
- Malleabbility of material
Q13 | A flywheel 200 cm in diameter is rotating at 100 rpm. A point on the rim of the flywheel will not have
- angular velocity
- centripental acceleration
- tangential acceleration
- all of the above
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Q14 | A block of weight 20 kg slides with an initial velocity of 2 m sec down an inclined plane on to a spring of stiffness 10 kg/cm. If the co--efficient of friction is 0.2, angle ? = 30 the ratio of maximum compession of spring, neglecting friction to that while considering friction would be
- More than one
- One
- Less than one
- Depends on the stiffness of spring
- None of the above
Q15 | A jet engine works on the principle of
- Conservation of energy
- Conservation of mass and momentum
- Conservation of linear mementum
- Conservation of energy and momentum
- Conservation of mass
Q16 | The angular velocity of seconds hand of a watch is
- 0.01745 sec-1
- 0.00001745 sec-1
- 0.0001745 sec-1
- 0.001745 sec-1
- 0.1047 sec-1
Q17 | A uniform cylinder of weight W is rolling while slipping on a rough horizontal surface under the influence of a horizontal force. The force of friction between the cylinder and the surface is
- Proportional to the coefficient of static friction
- Proportional to the coefficient of dynamic friction
- Indeterminate
- Determinate but depends on the acceleration of the cylinder
- None of the above
Q18 | The statement ---- if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two ---- is known as
- Law of polygon of forces
- D'Alembert's principle
- Newtons law of forces
- Lami's theorem
- Law of triangle of forces
Q19 | The dimensions of modulus of elasticity are
- MLT-2
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- MLT-1
- ML-2T-1
- ML-1T-2
Q20 | A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is
- ar2 / (R2 - r2)
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- aR/(R2-r2)
- aR/(R - r)
- ar3 / (R3 - r3)
Q21 | For a perfect frame having 13 members the number of joints must be
- 8
- 6
- 7
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- 9
Q22 | When a body moves round a fixed axis it will have
- A motion of rotation and translation
- A circular motion
- A rotary motion
- A translatory motion
- A swinging motion
Q23 | A ball is dropped from a height of 2.25 m on a smooth floor and it rises to a height of 1 m after the first bounce. The coefficient of restitutions between the ball and the floor is
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- 0.33
- 0.44
- 0.57
- 0.67
Q24 | The work done in sliding a block of weight of 50 kg up a plane inclined at an angle of 30? to the horizontal so that the block is lifted through 1 m (
- More than 50 kgm
- 50 kgm
- Less than 5 kgm
- 15 kgm only
- None of the above
Q25 | For perfectly elastic bodies, the value of the coefficient of restitution is
- 1
- 0.372
- 0.5
- Zero
- Any value between 0 and 1