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MCQs

Total Questions : 2607 | Page 116 of 261 pages
Question 1151.


The shear stress at a point in a shaft subjected to a torque is


  1.    directly proportional to the polar moment of inertia and to the distance of the point from the axis
  2.    directly proportional to the applied torque and inversely proportional to the polar moment of inertia
  3.    directly proportional to the applied torque and the polar moment of inertia
  4.    inversely proportional to the applied torque and the polar moment of inertia
 Discuss Question
Answer: Option B. -> directly proportional to the applied torque and inversely proportional to the polar moment of inertia


Question 1152.

 
Two concentric helical springs used to provide greater spring force are wound is opposite direction.


  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True


Question 1153.


The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)


  1.    d/8
  2.    d/6
  3.    d/4
  4.    d/2
 Discuss Question
Answer: Option C. -> d/4


Question 1154.

The load placed at the top of the screw in a mechanical screw jack is
prevented from rotation by providing a swivelling mechanism.


  1.    Correct
  2.    Incorrect
 Discuss Question
Answer: Option A. -> Correct


Question 1155.


In the levers of first type, the mechanical advantage is __________ one.


  1.    less than
  2.    equal to
  3.    more than
 Discuss Question
Answer: Option C. -> more than


Question 1156.


In a partial journal bearing, the angle of contact of the bearing with the journal is


  1.    `120^circ`
  2.    `180^circ`
  3.    `270^circ`
  4.    `360^circ`
 Discuss Question
Answer: Option A. -> `120^circ`


Question 1157.


A shaft coupling should


  1.    be easy to connect or disconnect
  2.    transmit full power of the shaft
  3.    hold the shafts in perfect alignment
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 1158.


The antifriction bearings


  1.    have low starting and low running friction at moderate speeds
  2.    have high initial cost
  3.    can carry both radial and thrust loads
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 1159.


The bearings of medium series have capacity __________ over the light series.


  1.    10 to 20%
  2.    20 to 30%
  3.    30 to 40%
  4.    40 to 50%
 Discuss Question
Answer: Option C. -> 30 to 40%


Question 1160.
 
According to I.B.R., the factor of safety of riveted joint should not be less than
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4


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