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MCQs

Total Questions : 2607 | Page 124 of 261 pages
Question 1231.

The ratio of the ultimate stress to the design stress is known as


  1.    elastic limit
  2.    strain
  3.    factor of safety
  4.    bulk modulus
 Discuss Question
Answer: Option C. -> factor of safety


Question 1232.
.According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
  1.    0.5 mm upto rivet diameter of 24 mm
  2.    1 mm for rivet diameter from 27 mm to 36 mm
  3.    2 mm for rivet diameter from 39 mm to 48 mm
  4.    all of the above
 Discuss Question
Answer: Option C. -> 2 mm for rivet diameter from 39 mm to 48 mm


Question 1233.

In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.


  1.    intersecting
  2.    non-intersecting and non-parallel
 Discuss Question
Answer: Option A. -> intersecting


Question 1234.
 
An elastic bar
is fixed at the upper end and loaded at the lower end by a falling
weight. The shock load produced can be reduced by
  1.    increasing the length of bar
  2.    decreasing the cross-sectional area of the bar
  3.    decreasing the modulus of elasticity of the bar
  4.    all of the above
 Discuss Question
Answer: Option A. -> increasing the length of bar


Question 1235.
 

A shaft is designed on the basis of rigidity and stiffness.


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


Question 1236.
Which of the following spring is used in mechanical wrist watch?
  1.    Helical compression spring
  2.    Spiral spring
  3.    Torsion spring
  4.    Bellevile spring
 Discuss Question
Answer: Option C. -> Torsion spring


Question 1237.
The ratio of driving tensions in V-belt drives is __________ flat belt drives.
  1.    equal to
  2.    sin `alpha` times more than
  3.    sin `alpha`times less than
  4.    cosec `alpha`times more than
 Discuss Question
Answer: Option D. -> cosec `alpha`times more than


Question 1238.


All stresses produced in a belt are


  1.    compressive stresses
  2.    tensile stresses
  3.    both tensile and compressive stresses
  4.    shear stresses
 Discuss Question
Answer: Option B. -> tensile stresses


Question 1239.

 
In worm gears, the pressure angle is half the angle between two inclined faces in axial plane.


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


Question 1240.


Lewis equation in gears is used to find the


  1.    tensile stress in bending
  2.    shear stress
  3.    compressive stress in bending
  4.    fatigue stress
 Discuss Question
Answer: Option C. -> compressive stress in bending


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