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MCQs

Total Questions : 2607 | Page 121 of 261 pages
Question 1201.


Pitch point of a cam is


  1.    a point on the pitch curve having minimum pressure angle
  2.    a point on the pitch curve having maximum pressure angle
  3.    any point on the pitch curve
  4.    any point on the pitch circle
 Discuss Question
Answer: Option B. -> a point on the pitch curve having maximum pressure angle


Question 1202.


A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M)
are 1000 N-m and 500 N-m respectively. If the combined shock and
fatigue factor for bending is 1.5 and combined shock and fatigue factor
for torsion is 2, then the equivalent twisting moment for the shaft is


  1.    2000 N-m
  2.    2050 N-m
  3.    2100 N-m
  4.    2136 N-m
 Discuss Question
Answer: Option D. -> 2136 N-m


Question 1203.

In block brakes, the ratio of shoe width to wheel diameter is taken between


  1.    0.1 and 0.25
  2.    0.25 and 0.50
  3.    0.50 and 0.75
  4.    0.75 and 1
 Discuss Question
Answer: Option B. -> 0.25 and 0.50


Question 1204.

Which of the following property is desirable in parts subjected to shock and impact loads?


  1.    Strength
  2.    Stiffness
  3.    Brittleness
  4.    Toughness
 Discuss Question
Answer: Option D. -> Toughness


Question 1205.
 
If a shaft made
from ductile material is subjected to combined bending and twisting
moment, calculations based on which one of the following failure
theories will give the most conservative value?
  1.    Maximum principal stress theory
  2.    Maximum shear stress theory
  3.    Maximum strain energy theory
  4.    Maximum distortion energy theory
 Discuss Question
Answer: Option A. -> Maximum principal stress theory


Question 1206.
Which of the following statement is wrong?
  1.    The pitch of rivets is obtained by equating the tearing resistance of the plate to the shearing resistance of the rivets
  2.    The pitch of rivets should not be less than 2 d, where d is the diameter of rivet hole
  3.    The maximum value of the pitch of rivets for a longitudinal joint of a boiler, as per I.B.R., is given by Pmax = C.t + 41.28 mm
  4.    According to I.B.R., the thickness of butt strap shall not be less than 5 mm
 Discuss Question
Answer: Option D. -> According to I.B.R., the thickness of butt strap shall not be less than 5 mm


Question 1207.

The diameter of washer is generally taken bigger than the nut size.


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


Question 1208.

In levers, leverage is the ratio of


  1.    load lifted to the effort applied
  2.    mechanical advantage to the velocity ratio
  3.    load arm to the effort arm
  4.    effort arm to the load arm
 Discuss Question
Answer: Option D. -> effort arm to the load arm


Question 1209.
 
A tapered key
which fits in a key way in the hub and the bottom of which is shaped to
fit the curved surface of the shaft, is known as hollow saddle key.
  1.    Correct
  2.    Incorrect
 Discuss Question
Answer: Option A. -> Correct


Question 1210.
The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
  1.    Yes
  2.    No
 Discuss Question
Answer: Option A. -> Yes


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