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MCQs

Total Questions : 2100 | Page 5 of 210 pages
Question 41. In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called
  1.    Lead
  2.    Steam lap
  3.    Exhaust lap
  4.    None of these
 Discuss Question
Answer: Option B. -> Steam lap
Question 42. If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
  1.    Four times the first one
  2.    Same as the first one
  3.    One fourth of the first one
  4.    One and a half times the first one
 Discuss Question
Answer: Option C. -> One fourth of the first one
Question 43. A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
  1.    The sum of the two masses is equal to the total mass of body
  2.    The center of gravity of the two masses coincides with that of the body
  3.    The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 44. The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
  1.    More than
  2.    Less than
  3.    Same as
  4.    None of these
 Discuss Question
Answer: Option B. -> Less than
Question 45. A system in dynamic balance implies that
  1.    The system is critically damped
  2.    There is no critical speed in the system
  3.    The system is also statically balanced
  4.    There will absolutely no wear of bearings
 Discuss Question
Answer: Option C. -> The system is also statically balanced
Question 46. For dynamic balancing of a shaft
  1.    The net dynamic force acting on the shaft is equal to zero
  2.    The net couple due to the dynamic forces acting on the shaft is equal to zero
  3.    Both (A) and (B)
  4.    None of the above
 Discuss Question
Answer: Option C. -> Both (A) and (B)
Question 47. Cross head and guides form a
  1.    Lower pair
  2.    Higher pair
  3.    Turning pair
  4.    Sliding pair
 Discuss Question
Answer: Option D. -> Sliding pair
Question 48. A slider crank chain consists of following numbers of turning and sliding pairs
  1.    1, 3
  2.    2, 2
  3.    3, 1
  4.    4, 0
 Discuss Question
Answer: Option C. -> 3, 1
Question 49. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)
  1.    P = W tan α
  2.    P = W tan (α + φ)
  3.    P = W (sin α + μ cos α)
  4.    P = W (cos α + μ sin α)
 Discuss Question
Answer: Option C. -> P = W (sin α + μ cos α)
Question 50. The Scott-Russell mechanism consists of
  1.    Sliding and turning pairs
  2.    Sliding and rotary pairs
  3.    Turning and rotary pairs
  4.    Sliding pairs only
 Discuss Question
Answer: Option A. -> Sliding and turning pairs

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