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Total Questions : 2607 | Page 99 of 261 pages
Question 981.

The acme threads are usually found on


  1.    spindles of bench vices
  2.    railway carriage couplings
  3.    feed mechanism of machine tools
  4.    screw cutting lathes
 Discuss Question
Answer: Option D. -> screw cutting lathes


Question 982.

Which of the following statement is correct?


  1.    The distance from a point on one thread to the corresponding point on the next thread is called pitch
  2.    The distance which a screw thread advances axially in one rotation of the nut is called lead
  3.    In single start threads, lead is equal to pitch
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above


Question 983.
The design calculations for members subject to fluctuating loads with
the same factor of safety, yield the most conservative estimates when
using
  1.    Gerber relation
  2.    Soderberg relation
  3.    Good man relation
  4.    none of these
 Discuss Question
Answer: Option C. -> Good man relation


Question 984.
A lap joint is always in single shear.
  1.    Yes
  2.    No
 Discuss Question
Answer: Option A. -> Yes


Question 985.
 
If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as
  1.    b/L
  2.    b/2 L
  3.    1 - 2 b.L
  4.    1 - b/L
 Discuss Question
Answer: Option D. -> 1 - b/L


Question 986.

The shock absorbing capacity of a bolt may be increased by


  1.    increasing its shank diameter
  2.    decreasing its shank diameter
  3.    tightening the bolt properly
  4.    making the shank diameter equal to core diameter of thread
 Discuss Question
Answer: Option B. -> decreasing its shank diameter


Question 987.


When percentage of carbon in steel is increased, the ductility of steel decreases.


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


Question 988.

 
The pitch diameter is the __________ diameter of an external or internal screw thread.


  1.    effective
  2.    smallest
  3.    largest
 Discuss Question
Answer: Option A. -> effective


Question 989.
The coefficient of friction between the belt and pulley depends upon the
  1.    material of belt and pulley
  2.    slip of belt
  3.    speed of belt
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these


Question 990.


The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.


  1.    one-fourth
  2.    one-third
  3.    one-half
  4.    double
 Discuss Question
Answer: Option B. -> one-third


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