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Total Questions : 2607 | Page 50 of 261 pages
Question 491. When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.
  1.    10 times
  2.    5 times
  3.    15 times
  4.    20 times
 Discuss Question
Answer: Option C. -> 15 times
Question 492. When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
  1.    Have contact at the bottom most of the bearing
  2.    Move towards right of the bearing making metal to metal contact
  3.    Move towards right of the bearing making no metal to metal contact
  4.    Move towards left of the bearing making metal to metal contact
 Discuss Question
Answer: Option C. -> Move towards right of the bearing making no metal to metal contact
Question 493. When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
  1.    Have contact at the bottom most of the bearing
  2.    Move towards right of the bearing making no metal to metal contact
  3.    Move towards right of the bearing making the metal to metal contact
  4.    Move towards left of the bearing making metal to metal contact
 Discuss Question
Answer: Option D. -> Move towards left of the bearing making metal to metal contact
Question 494. The objective of idler pulley in belt drive is to
  1.    Decrease the tendency of belt to slip
  2.    Increase the power transmission capacity
  3.    Increase the wrap angle and belt tension
  4.    All the above objectives
 Discuss Question
Answer: Option D. -> All the above objectives
Question 495. The objective of 'crowning' of the flat pulleys of belt drive is to
  1.    Prevent the belt from running off the pulley
  2.    Increase the power transmission capacity
  3.    Increase the belt velocity
  4.    Prevent the belt joint from damaging the belt surface
 Discuss Question
Answer: Option A. -> Prevent the belt from running off the pulley
Question 496. 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
Question 497. The size of a cam depends upon
  1.    Base circle
  2.    Pitch circle
  3.    Prime circle
  4.    Pitch curve
 Discuss Question
Answer: Option A. -> Base circle
Question 498. The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is
  1.    Larger
  2.    Smaller
  3.    Equal
  4.    Larger/smaller depending on diameter of spring coil
 Discuss Question
Answer: Option A. -> Larger
Question 499. In a horizontal flat belt drive, it is customary to use
  1.    Bottom side of belt as slack side
  2.    Top side of belt as slack side
  3.    Idler pulley
  4.    None of the above
 Discuss Question
Answer: Option B. -> Top side of belt as slack side
Question 500. The coefficient of friction between the belt and pulley depends upon the
  1.    Material of belt and pulley
  2.    Slip of belt
  3.    Speed of belt
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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