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MCQs

Total Questions : 2607 | Page 52 of 261 pages
Question 511. The property of a material which enables it to be drawn into wires with the application of a tensile force, is called
  1.    Plasticity
  2.    Elasticity
  3.    Ductility
  4.    Malleability
 Discuss Question
Answer: Option C. -> Ductility
Question 512. The root angle of a bevel gear is equal to
  1.    Pitch angle - addendum angle
  2.    Pitch angle + addendum angle
  3.    Pitch angle - dedendum angle
  4.    Pitch angle + dedendum angle
 Discuss Question
Answer: Option C. -> Pitch angle - dedendum angle
Question 513. The face angle of a bevel gear is equal to
  1.    Pitch angle - addendum angle
  2.    Pitch angle + addendum angle
  3.    Pitch angle - dedendum angle
  4.    Pitch angle + dedendum angle
 Discuss Question
Answer: Option B. -> Pitch angle + addendum angle
Question 514. The longitudinal joint in boilers is used to get the required
  1.    Length of boiler
  2.    Diameter of boiler
  3.    Length and diameter of boiler
  4.    Efficiency of boiler
 Discuss Question
Answer: Option B. -> Diameter of boiler
Question 515. The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
  1.    d/8
  2.    d/6
  3.    d/4
  4.    d/2
 Discuss Question
Answer: Option C. -> d/4
Question 516. According to Indian standard specifications, 100 H6/g5 means that
  1.    Tolerance grade for the hole is 6 and for the shaft is 5
  2.    Tolerance grade for the shaft is 6 and for the hole is 5
  3.    Tolerance grade for the shaft is 4 to 8 and for the hole is 3 to 7
  4.    Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7
 Discuss Question
Answer: Option A. -> Tolerance grade for the hole is 6 and for the shaft is 5
Question 517. When a machine member is subjected to torsion, the torsional shear stress set up in the member is
  1.    Zero at both the centroidal axis and outer surface of the member
  2.    Maximum at both the centroidal axis and outer surface of the member
  3.    Zero at the centroidal axis and maximum at the outer surface of the member
  4.    Maximum at the centroidal axis and zero at the outer surface of the member
 Discuss Question
Answer: Option C. -> Zero at the centroidal axis and maximum at the outer surface of the member
Question 518. In Vickers hardness testing, the pyramid indentor apex is
  1.    40°
  2.    122°
  3.    136°
  4.    152°
 Discuss Question
Answer: Option C. -> 136°
Question 519. Wahl's stress factor __________ very rapidly as the spring index decreases.
  1.    Increases
  2.    Decreases
  3.    Remain same
  4.    None of these
 Discuss Question
Answer: Option A. -> Increases
Question 520. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
  1.    0.4 times
  2.    0.6 times
  3.    0.7 times
  4.    0.8 times
 Discuss Question
Answer: Option A. -> 0.4 times

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