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MCQs

Total Questions : 2100 | Page 6 of 210 pages
Question 51. The number of links in pantograph mechanism is equal to
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option C. -> 4
Question 52. Which is the false statement about the properties of instantaneous center?
  1.    At the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
  2.    The two rigid links have no linear velocities relative to each other at the instantaneous center
  3.    The two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link
  4.    The double center can be denoted either by O2 or O12, but proper selection should be made
 Discuss Question
Answer: Option D. -> The double center can be denoted either by O2 or O12, but proper selection should be made
Question 53. The indicator using Watt mechanism is known as
  1.    Thompson indicator
  2.    Richard indicator
  3.    Simplex indicator
  4.    Thomson indicator
 Discuss Question
Answer: Option B. -> Richard indicator
Question 54. In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
  1.    (r₁ + r₂) (y/x)
  2.    (r₁ + r₂) (x/y)
  3.    (r₁ - r₂) (y/x)
  4.    (r₁ - r₂) (x/y)
 Discuss Question
Answer: Option C. -> (r₁ - r₂) (y/x)
Question 55. Hart mechanism has
  1.    Eight links
  2.    Six links
  3.    Four links
  4.    Twelve links
 Discuss Question
Answer: Option B. -> Six links
Question 56. The periodic time is given by (where ω = Angular velocity of the particle in rad/s)
  1.    ω/2π
  2.    2π/ω
  3.    ω × 2π
  4.    π/ω
 Discuss Question
Answer: Option B. -> 2π/ω
Question 57. Which of the following statement is wrong?
  1.    The difference between the maximum and minimum energies is called maximum fluctuation of energy
  2.    The coefficient of fluctuation of speed is the ratio of maximum fluctuation of speed to the mean speed
  3.    The variations of energy above and below the mean resisting torque line is known as fluctuation of energy
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 58. Which of the following statement is wrong?
  1.    A round bar in a round hole form a turning pair
  2.    A square bar in a square hole form a sliding pair
  3.    A vertical shaft in a foot step bearing forms a successful constraint
  4.    All of the above
 Discuss Question
Answer: Option C. -> A vertical shaft in a foot step bearing forms a successful constraint
Question 59. In the two rotor system as shown in the below figure (I₁ < I₂), a node of vibration is situated
  1.    Between I₁, and I₂ but nearer I₁
  2.    Between I₁, and I₂ but nearer to I₂
  3.    Exactly in the middle of the shaft
  4.    Nearer to I₁ but outside
 Discuss Question
Answer: Option B. -> Between I₁, and I₂ but nearer to I₂
Question 60. The height of a Watt's governor is
  1.    Directly proportional to speed
  2.    Directly proportional to (speed)²
  3.    Inversely proportional to speed
  4.    Inversely proportional to (speed)²
 Discuss Question
Answer: Option D. -> Inversely proportional to (speed)²

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