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MCQs

Total Questions : 2607 | Page 79 of 261 pages
Question 781. The ball bearings are provided with a cage
  1.    to reduce friction
  2.    to facilitate slipping of balls
  3.    to prevent the lubricant from flowing out
  4.    to maintain the balls at a fixed distance apart
 Discuss Question
Answer: Option D. -> to maintain the balls at a fixed distance apart
Answer: (d).to maintain the balls at a fixed distance apart
Question 782. Circumferential joint in boilers is used to get the required length of a boiler.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 783. Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)
  1.    0.124 - (0.684/T)
  2.    0.154 - (0.912/T)
  3.    0.175 - (0.841/T)
  4.    none of these
 Discuss Question
Answer: Option A. -> 0.124 - (0.684/T)
Answer: (a).0.124 - (0.684/T)
Question 784. The distribution of the forces along the length of key fitted in a shaft
  1.    varies linearly
  2.    is uniform throughout
  3.    varies exponentially, being more near the torque-input end
  4.    varies exponentially, being less near the torque-input end
 Discuss Question
Answer: Option C. -> varies exponentially, being more near the torque-input end
Answer: (c).varies exponentially, being more near the torque-input end
Question 785. For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)
  1.    2μ sinθ/(θ + sinθ)
  2.    μ sinθ/(2θ + sin 2θ)
  3.    4μ sinθ/(θ + sinθ)
  4.    4μ sinθ/(2θ + sin 2θ)
 Discuss Question
Answer: Option D. -> 4μ sinθ/(2θ + sin 2θ)
Answer: (d).4μ sinθ/(2θ + sin 2θ)
Question 786. The stretching in a belt can be controlled by __________ the stress in the belt.
  1.    reducing
  2.    increasing
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> reducing
Answer: (a).reducing
Question 787. When a cylinder is subjected to a very high internal fluid pressure, the thin cylinder should be used.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> Incorrect
Answer: (b).Incorrect
Question 788. If T1 and T2 are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
  1.    T1 - T2 + Tc
  2.    T1 + T2 + Tc
  3.    (T1 - T2 + Tc)/2
  4.    (T1 + T2 + Tc)/2
 Discuss Question
Answer: Option D. -> (T1 + T2 + Tc)/2
Answer: (d).(T1 + T2 + Tc)/2
Question 789. In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be
  1.    0.96
  2.    0.97
  3.    0.98
  4.    0.99
 Discuss Question
Answer: Option A. -> 0.96
Answer: (a).0.96
Question 790. In a full journal bearing, the angle of contact of the bearing with the journal is
  1.    120°
  2.    180°
  3.    270°
  4.    360°
 Discuss Question
Answer: Option D. -> 360°
Answer: (d).360°

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