Applied Mechanics MCQs with answers Page - 7

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Q. The coefficient of friction is

  • (A) The tangent of the angle between the normal reaction and direction of limiting friction
  • (B) The tangent of the angle between the normal reaction and the resultant of the normal reaction and the limiting friction
  • (C) The tangent of the angle of the net resultant force with the direction of motion
  • (D) The tangent of the angle between the horizontal plane and the resultant force

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Q. The maximum frictional force which comes into play when a body just begins to slide over the surface of another body is known as

  • (A) Kinetic friction
  • (B) Rolling friction
  • (C) Dynamic friction
  • (D) Limiting friction

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Q. In planetary motion

  • (A) The total angular momentum remains constant
  • (B) The total linear momentum remains constant
  • (C) The total linear momentum is zero
  • (D) The total angular momentum is zero

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Q. The moment of inertia of a semi-circle of radius r with respect to a centroidal axis parallel to the diameter is

  • (A) 0.33 r2
  • (B) 0.11 r2
  • (C) 0.055 r2
  • (D) 0.05 r2

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Q. A satellite orbits the earth 200 km above the surface. What speed, in m/s, is necessary for a circular orbit? The radius of the earth is 6400 km and g = 9.2 m/s2

  • (A) 7200
  • (B) 6600
  • (C) 7800
  • (D) 6000

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Q. The curve of a catenary by nature is

  • (A) hyperbolic
  • (B) ellipse
  • (C) circular
  • (D) parabolic

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Q. The power of a locomotive is 315 kW and the total weight of the train is 2000 kN. If the track resistance is qN per kN, the maximum speed that the locomotive can attain on level track will be

  • (A) 103 kmph
  • (B) 83 kmph
  • (C) 43 kmph
  • (D) 63 kmph

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Q. If for power transmission a gear train consisting of 11 gears is used, then

  • (A) the motion of driver and follower will be in the same direction
  • (B) The motion of driver and follower will be in the opposite direction
  • (C) either of (A) or (B) above
  • (D) None of the above

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Q. A body weighing one tonne falls through 8 cm on to a spring of stiffness 500 kg/cm the spring will be compressed through

  • (A) 8 cm
  • (B) 6 cm
  • (C) 4 cm
  • (D) 10 cm

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Q. What is the total acceleration of a point on the rim of a flywheel 4 mts in diameter 0.6 see after it has started from rest if it accelarates uniformly from rest to 2000 rpm in 20 secs.

  • (A) 68.9 mts/sec2
  • (B) 102.6 mts/sec2
  • (C) 78.94 mts/sec2
  • (D) 33.2 mts/sec2

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