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MCQs

Total Questions : 2607 | Page 109 of 261 pages
Question 1081.

The temperature at which the new grains are formed in the metal is known as


  1.    lower critical temperature
  2.    upper critical temperature
  3.    recrystallisation temperature
  4.    none of these
 Discuss Question
Answer: Option C. -> recrystallisation temperature


Question 1082.

Deep groove ball bearings are used for


  1.    heavy thrust load only
  2.    small angular displacement of shafts
  3.    radial load at high speed
  4.    combined thrust and radial loads at high speed
 Discuss Question
Answer: Option D. -> combined thrust and radial loads at high speed


Question 1083.

 
The malleable material should be plastic but is not essential to be so strong.


  1.    Agree
  2.    Disagree
 Discuss Question
Answer: Option A. -> Agree


Question 1084.
In case of thick cylinders, the tangential stress across the thickness of cylinder is
  1.    maximum at the outer surface and minimum at the inner surface
  2.    maximum at the inner surface and minimum at the outer surface
  3.    maximum at the inner surface and zero at the outer surface
  4.    maximum at the outer surface and zero at the inner surface
 Discuss Question
Answer: Option B. -> maximum at the inner surface and minimum at the outer surface


Question 1085.

The cam follower generally used in automobile engines is


  1.    knife edge follower
  2.    flat faced follower
  3.    spherical faced follower
  4.    roller follower
 Discuss Question
Answer: Option C. -> spherical faced follower


Question 1086.

In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of


  1.    combined effect of transverse shear stress and bending stress in the wire
  2.    combined effect of bending stress and curvature of the wire
  3.    combined effect of transverse shear stress and curvature of wire
  4.    combined effect of torsional shear stress and transverse shear stress in the wire
 Discuss Question
Answer: Option B. -> combined effect of bending stress and curvature of the wire


Question 1087.


A closely coiled
helical spring is acted upon by an axial force. The maximum shear
stress developed in the spring is `tau`. The half of the length of the
spring if cut off and the remaining spring is acted upon by the same
axial force. The maximum shear stress in the spring in new condition
will be


  1.    `tau`/2
  2.    `tau`
  3.    2`tau`
  4.    4 `tau`
 Discuss Question
Answer: Option B. -> `tau`


Question 1088.
 
According to Indian standards, total number of fundamental deviations are
  1.    10
  2.    15
  3.    20
  4.    25
 Discuss Question
Answer: Option D. -> 25


Question 1089.
When compared to the rod of the same diameter and material, a wire rope
  1.    is less flexible
  2.    has a much smaller load carrying capacity
  3.    does not provide much warning before failure
  4.    provides much greater time for remedial action before failure
 Discuss Question
Answer: Option A. -> is less flexible


Question 1090.

The steel widely used for motor car crankshafts is


  1.    nickel steel
  2.    chrome steel
  3.    nickel chrome steel
  4.    high speed steel
 Discuss Question
Answer: Option B. -> chrome steel


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