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MCQs

Total Questions : 3218 | Page 11 of 322 pages
Question 101. In which of the following body shapes, the pressure drag is large compared to the friction drag?
  1.    Stream line body
  2.    Two dimensional body
  3.    Bluff body
  4.    None of these
 Discuss Question
Answer: Option C. -> Bluff body
Question 102. Which of the following denotes the effect of compressibility in fluid flow?
  1.    Weber number
  2.    Mach number
  3.    Euler number
  4.    Reynolds number
 Discuss Question
Answer: Option B. -> Mach number
Question 103. In the low Reynolds number region, the drag force on a sphere is proportional to
  1.    V
  2.    V2
  3.    V4
  4.    V0.5
 Discuss Question
Answer: Option A. -> V
Question 104. Pick out the wrong statement:
  1.    The vacuum pressure is always the negative gauge pressure
  2.    The pressure of the liquid measured by a piezometer tube is the gauge pressure
  3.    Manometric liquid should have high surface tension
  4.    The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
 Discuss Question
Answer: Option D. -> The point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity
Question 105. The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonion fluid in a circular pipe is
  1.    0.5
  2.    1
  3.    2
  4.    0.66
 Discuss Question
Answer: Option A. -> 0.5
Question 106. Power required for mixing Newtonion fluids is a function of the
  1.    Speed of impeller, diameter of impeller & viscosity
  2.    Density & viscosity of fluid only
  3.    Density of fluid, viscosity of fluid & impeller dia only
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 107. Nominal size of a pipe is an indication of its __________ diameter.
  1.    Inner
  2.    Outer
  3.    Approximate
  4.    None of these
 Discuss Question
Answer: Option C. -> Approximate
Question 108. One dimensional flow implies
  1.    Flow in a straight line
  2.    Steady uniform flow
  3.    Unsteady uniform flow
  4.    A flow which does not account for changes in transverse direction
 Discuss Question
Answer: Option D. -> A flow which does not account for changes in transverse direction
Question 109. For pumping slurry, one can use a __________ pump.
  1.    Reciprocating
  2.    Diaphargm
  3.    Centrifugal
  4.    Pneumatic
 Discuss Question
Answer: Option B. -> Diaphargm
Question 110. One horsepower is equal to
  1.    550 lbf.ft/second
  2.    550 kgf.m/second
  3.    Both A and B
  4.    550 lbf.ft./hr
 Discuss Question
Answer: Option A. -> 550 lbf.ft/second

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