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MCQs

Total Questions : 3218 | Page 10 of 322 pages
Question 91. Which of the following equations is valid for laminar flow of a fluid through packed bed?
  1.    Fanning equation
  2.    Kozney - Karman equation
  3.    Hagen - Poiseuille equation
  4.    Blake - Plummer equation
 Discuss Question
Answer: Option B. -> Kozney - Karman equation
Question 92. Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about
  1.    0.42
  2.    0.62
  3.    0.82
  4.    0.98
 Discuss Question
Answer: Option B. -> 0.62
Question 93. Fanning friction factor for laminar flow of fluid in a circular pipe is
  1.    Not a function of the roughness of pipe wall
  2.    Inversely proportional to Reynolds number
  3.    Both A and B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A and B
Question 94. The distribution of shear stress in a stream of fluid in a circular tube is
  1.    Linear with radius for turbulent flow only
  2.    Linear with radius for laminar flow only
  3.    Linear with radius for both laminar & turbulent flow
  4.    Parabolic with radius for both laminar & turbulent flow
 Discuss Question
Answer: Option C. -> Linear with radius for both laminar & turbulent flow
Question 95. Purpose of hydraulic accumulator is to
  1.    Ensure intermittant supply of hydraulic pressure
  2.    Increase the pressure and store/ accumulate it
  3.    Accumulate pressure to increase force
  4.    Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc
 Discuss Question
Answer: Option D. -> Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc
Question 96. Which of the following properties of a fluid is responsible for offering resistance to shear?
  1.    Surface tension
  2.    Viscosity
  3.    Specific gravity
  4.    All of the above
 Discuss Question
Answer: Option B. -> Viscosity
Question 97. An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic?
  1.    Sewage sludge
  2.    Rubber latex
  3.    Blood
  4.    Sugar solution
 Discuss Question
Answer: Option A. -> Sewage sludge
Question 98. Which of the following is a Newtonian fluid?
  1.    Rubber latex
  2.    Sewage sludge
  3.    Quicksand
  4.    Non-colloidal solution
 Discuss Question
Answer: Option D. -> Non-colloidal solution
Question 99. Centrifugal pumps as compared to reciprocating pumps
  1.    Run at a lower speed for the same discharge
  2.    Do not need priming
  3.    Deliver fluid with pulsating/fluctuating discharge
  4.    Can be run with discharge line valve closed for a short interval
 Discuss Question
Answer: Option D. -> Can be run with discharge line valve closed for a short interval
Question 100. Nominal size of the discharge pipe of a pump is usually __________ the nominal size of the inlet pipe.
  1.    Smaller than
  2.    Larger than
  3.    Same as
  4.    Twice
 Discuss Question
Answer: Option A. -> Smaller than

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