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MCQs

Total Questions : 2607 | Page 55 of 261 pages
Question 541. The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
  1.    Increases
  2.    Decreases
  3.    Remain same
  4.    None of these
 Discuss Question
Answer: Option A. -> Increases
Question 542. For longitudinal joint in boilers, the type of joint used is
  1.    Butt joint with single cover plate
  2.    Butt joint with double cover plate
  3.    Lap joint with one ring overlapping the other
  4.    Any one of the above
 Discuss Question
Answer: Option B. -> Butt joint with double cover plate
Question 543. For circumferential joint in boilers, the type of joint used is
  1.    Butt joint with single cover plate
  2.    Butt joint with double cover plate
  3.    Lap joint with one ring overlapping the other
  4.    Any one of the above
 Discuss Question
Answer: Option C. -> Lap joint with one ring overlapping the other
Question 544. A column of length l is fixed at both ends. The equivalent length of the column is
  1.    l/2
  2.    l/√2
  3.    l
  4.    2 l
 Discuss Question
Answer: Option A. -> l/2
Question 545. The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
  1.    It is subjected to a higher cyclic loading than the outer side
  2.    It is subjected to a higher stress than the outer side
  3.    It is more stretched than the outer side during the manufacturing process
  4.    It has a lower curvature than the outer side
 Discuss Question
Answer: Option A. -> It is subjected to a higher cyclic loading than the outer side
Question 546. Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
  1.    Elastic strength
  2.    Yield strength
  3.    Shear strength
  4.    None of these
 Discuss Question
Answer: Option B. -> Yield strength
Question 547. When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
  1.    Bending stress only
  2.    A combination of torsional shear stress and bending
  3.    Direct shear stress only
  4.    A combination of bending stress and direct shear stress
 Discuss Question
Answer: Option A. -> Bending stress only
Question 548. A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
  1.    Equal to 1/10
  2.    Less than 1/10
  3.    Greater than 1/10
  4.    None of these
 Discuss Question
Answer: Option C. -> Greater than 1/10
Question 549. The pitch of threads on a Jock nut in comparison to pitch of nut is
  1.    Same
  2.    Coarser
  3.    Finer
  4.    Very fine
 Discuss Question
Answer: Option A. -> Same
Question 550. In hydrodynamic bearings
  1.    The oil film pressure is generated only by the rotation of the journal
  2.    The oil film is maintained by supplying oil under pressure
  3.    Do not require external supply of lubricant
  4.    Grease is used for lubrication
 Discuss Question
Answer: Option A. -> The oil film pressure is generated only by the rotation of the journal

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