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MCQs

Total Questions : 2607 | Page 92 of 261 pages
Question 911.


An universal coupling is a type of __________ coupling.


  1.    rigid
  2.    flexible
 Discuss Question
Answer: Option B. -> flexible


Question 912.

 
The application of second type levers is found in


  1.    handle of a hand pump
  2.    hand wheel of a punching press
  3.    lever of a loaded safety valve
  4.    a pair of tongs
 Discuss Question
Answer: Option C. -> lever of a loaded safety valve


Question 913.


A castle nut is a locking device in which


  1.    a thinner nut is tightened down over a thicker or main nut and the main nut is tightened against the thinner nut by loosening
  2.    a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears
  3.    a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction
  4.    the bottom cylindrical portion is recessed to receive the tip of the locking set screw
 Discuss Question
Answer: Option B. -> a slot is cut in line with the centre of each face and a split pin passes through two slots in the nut and a hole in the bolt, so that a positive lock is obtained unless the pin shears


Question 914.

A triple riveted butt joint with double straps of unequal width is to be
designed for a boiler shell. The pitch of the rivets in the outer row
is double the pitch in the inner row and zig-zag riveting is proposed.
Which of the following statement is correct?


  1.    There are four rivets per pitch length, all in double shear
  2.    There are four rivets per pitch length, out of which two are in single shear and two are in double shear
  3.    There are five rivets per pitch length, all in double shear
  4.    There are five rivets per pitch length, out of which four are in double shear and one is in single shear
 Discuss Question
Answer: Option D. -> There are five rivets per pitch length, out of which four are in double shear and one is in single shear


Question 915.

When carbon in the cast iron is in the form of cementite, the cast iron will be of white colour.


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


Question 916.


The form factor of a helical gear __________ with the increase in the helix angle.


  1.    increases
  2.    decreases
  3.    remains constant
 Discuss Question
Answer: Option A. -> increases


Question 917.

The taper on a rectangular sunk key is


  1.    1 in 16
  2.    1 in 32
  3.    1 in 48
  4.    1 in 100
 Discuss Question
Answer: Option D. -> 1 in 100


Question 918.


The stress in
the bar when the load is applied suddenly is __________ as compared to
the stress induced due to gradually applied loads.


  1.    same
  2.    double
  3.    three times
  4.    four times
 Discuss Question
Answer: Option B. -> double


Question 919.

 
Wire ropes as compared to cotton ropes


  1.    are lighter in weight
  2.    offer silent operation
  3.    can withstand shock loads
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 920.

 
Two helical
springs of the same material and of equal circular cross-section, length
and number of turns, but having radii 80 mm and 40 mm, kept
concentrically (smaller radius spring within the larger radius spring),
are compressed between two parallel planes with a load W. The inner spring will carry a load equal to


  1.    W/2
  2.    2 W/3
  3.    W/9
  4.    8 W/9
 Discuss Question
Answer: Option B. -> 2 W/3


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