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This set of Applied Mechanics Multiple Choice Questions & Answers (MCQs) focuses on Applied Mechanics Set 5
Q1 | Which of the following statement is incorrect?
- A body can have energy without having momentum
- A body cannot have kinetic energy without having momentum
- A body in motion will always have kinetic energy more than the potential energy
- None of the above
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Q2 | The value of acceleration due to gravity is 980 cm/sec2. Its value in meter per (hour)2 will be
- 1.27 x 108
- 127
- 1270
- 1.27 x 107
- 1270000
Q3 | The torque acting on a system is zero. Which of the following will be conserved?
- Angular velocity
- Linear momentum
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- Angular momentum
- Moment of inertia
Q4 | Our weight will be zero under all of the following conditions EXCEPT
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- We are at the centre of the earth
- When we are ascending in a lift with acceleration of 4.9 m/s2
- We are orbiting in a satellite
- When we are freely faling
Q5 | A clock with a second pendulum is gaining 5 minutes a day. To correct it
- The eccentricity of bob with pendulum should be decreased
- The length of the pendulum should be decreased
- The length of pendulum should not be changed
- The length of the pendulum should be increased
- The eccentricity of bon with pendulum should be increased
Q6 | Which of the following is not a projectile?
- Bullet coming out of a revolver
- Arrow released from a bow
- Lifting of a balloon
- Throwing a cricket ball from one player to another
- None of the above
Q7 | The piston of a steam engine moves in S.H.M. The crank rotates at 180 r.p.m. and the stroke length is 2 metres. The linear velocity of the piston when it is at a distance of 1 metre from the centre is
- 8.88 m/sec
- 16.32 m/sec
- 5.88 m/sec
- 8.16 m/sec
- Zero
Q8 | A cage weighing 200 kg is lowered down a mine shaft with uniform acceleration. In the first 5 sec the cage reaches a depth of 20 m. The tension in the cord lowering the cage would be
- 836 kg
- 167.2 kg
- 100 kg
- 41.8 kg
- 200 kg
Q9 | Static friction is always
- greater than the dynamic driction
- either greater or more than the dynamic friction
- less than the dynamic friction
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- equal to the dynamic friction
Q10 | Which of the following bearing will have least coefficient of friction
- Single ball bearing
- Cylinderical roller bearing
- Self aligury bearing
- Thrust ball bearing
- Tapered bearing
Q11 | The dimensions of power are
- ML2T3
- ML2T2
- MLT3
- ML2T-3
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Q12 | A body is executing simple harmonic motion of amplitude 1 cm. Its velocitywhile passing through the central point is 10 mm/sec. Its frequency will be
- 2.99 rps
- 2.22 rps
- 1 rps
- 1.59 rps
- 1.77 rps
Q13 | Which of the following is dimensionless?
- Specific speed
- Specific volume
- Specific gravity
- Specific weight
- None of the above
Q14 | If two bodies one light and one heavy have equal kinetic energies, which one has a greater momentum?
- Momentum depends on velocities
- Heavy body
- Both have equal momentum
- Nothing can be concluded on the basis of information provided
- Light body
Q15 | A car travelling at a speed of 60 km/hour is braked and comes to rest 6 seconds after the brakes are applied. The minimum coefficient of driction between the wheels and the road would be
- 0.107
- 0.3
- 0.283
- 0.417
- 0.5
Q16 | A man weighing 60 kg jumps on a vehicle of weight 240 kg moving with a velocity of 36 km/hours. The velocity of the vehicle after the man has jumped would be
- Less than 3.6 km/hour
- 3.6 km/hour
- More than 3.6 km/hour
- 4.5 km/hour
- None of the above
Q17 | How many coins 0.75 cm in diameter and 1/8 cm thick must be malted down to form a rectangular solid whose edges are 5 cm. 4 cm and 3 cm?
- 584
- 1087
- 0.00001745 sec-1
- 1234
- 2174
Q18 | The gravitational field intensity is maximum at the
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- at a height above the surface
- pole
- equator
- centre of the earth
Q19 | A ball of mass 1 kg moving with a velocity of 2 m/sec collides directly with a stationary ball of mass 2 kg. If the first ball comes to rest after the impact the velocity of second ball after impact will be
- 1.5 m/sec
- 0.5 m/sec
- Zero
- 2 m/sec
- 1.0 m/sec
Q20 | A particle moves along a rough plane inclined at 30? to the horizontal. The co-efficient of friction between the particle and the plane is 0.1. Its initial velocity is 15 m/sec. The ratio of the velocity of the particle when it move down the plane to that when it move up the plane would be in the regions
- 8 ? 10
- 5 ? 7
- 2 ? 3
- 4 ? 6
- 10 ? 13
Q21 | In case of cantilever, irrespective of the type of loading the maximum bendry moment and maximum shear force occur at
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- Free end
- 2/3 of the length, from the free end
- Centre of the beam
- Fixed end
Q22 | A beam fixed at both ends with a central load W in the middle will have zero bending moment at
- one place
- two places
- no where
- three places
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Q23 | If the positive and negative shear force diagram areas are not equal, it can be concluded that
- shear force diagram has been wrongly drawn
- there is at least one couple acting on the beam
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- there are at least two maxima for bending moment
- bending moment does not change sign
Q24 | One joule is equal to
- 105 ergs
- 108 ergs
- 104 ergs
- 107 ergs
- 106 ergs
Q25 | 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
- Indeterminate
- Proportional to the coefficient of dynamic friction
- Determinate but depends on the acceleration of the cylinder
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- Proportional to the coefficient of static friction