Lakshya Education MCQs

Question: In a flat collar pivot bearing, the moment due to friction is proportional to
Options:
A. (r₁² - r₂²)/(r₁ - r₂)
B. (r₁² - r₂²)/(r₁ + r₂)
C. (r₁³ - r₂³)/(r₁² - r₂²)
D. (r₁³ - r₂³)/(r₁ - r₂)
Answer: Option C

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More Questions on This Topic :

Question 1. The velocity of the rubbing surface __________ with the distance from the axis of the bearing.
  1.     Increases
  2.     Decreases
  3.     Remain same
  4.     None of these
Answer: Option A
Question 2. Longitudinal vibrations are said to occur when the particles of a body moves
  1.     Perpendicular to its axis
  2.     Parallel to its axis
  3.     In a circle about its axis
  4.     None of these
Answer: Option B
Question 3. Torsional vibrations are said to occur when the particles of a body moves
  1.     Perpendicular to its axis
  2.     Parallel to its axis
  3.     In a circle about its axis
  4.     None of these
Answer: Option C
Question 4. Torsional vibrations are said to occur when the particles of a body moves
  1.     Perpendicular to its axis
  2.     Parallel to its axis
  3.     In a circle about its axis
  4.     None of these
Answer: Option C
Question 5. If ‘d₁’ and ‘d₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to
  1.     D₁/D₂
  2.     D₂/D₁
  3.     D₁.D₂
  4.     D₁
Answer: Option D
Question 6. The velocity of the rubbing surface __________ with the distance from the axis of the bearing.
  1.     Increases
  2.     Decreases
  3.     Remain same
  4.     None of these
Answer: Option A

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