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MCQs

Total Questions : 3218 | Page 318 of 322 pages
Question 3171. Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
  1.    A, C, D
  2.    B, D, E
  3.    A, B, E
  4.    A, D, E
 Discuss Question
Answer: Option C. -> A, B, E
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3172. The simple Pitot tube does not measure the________________?
  1.    Static pressure
  2.    Dynamic pressure
  3.    Velocity at the stagnation point
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3173. Multistage centrifugal pumps are generally used for________________?
  1.    High head
  2.    Low head but high discharge
  3.    Highly viscous liquid
  4.    Slurries of high solid concentration
 Discuss Question
Answer: Option A. -> High head
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3174. Which of the following valves will incur maximum pressure drop for the same discharge of water ?
  1.    Globe valve
  2.    Gate valve
  3.    Needle valve
  4.    Butterfly valve
 Discuss Question
Answer: Option C. -> Needle valve
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3175. Specific speed of a centrifugal pump depends upon the ______________ head?
  1.    Suction
  2.    Delivery
  3.    Manometric
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3176. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the ____________ head?
  1.    Manometric
  2.    Total
  3.    Static
  4.    Friction
 Discuss Question
Answer: Option A. -> Manometric
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3177. For water, when the pressure increases, the viscosity_________________?
  1.    Also increases
  2.    Decreases
  3.    Remain constant
  4.    First decreases, and then increases
 Discuss Question
Answer: Option D. -> First decreases, and then increases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3178. Air vessel provided in a reciprocating pump is for__________________?
  1.    Increasing the acceleration head
  2.    Making the friction in pipe uniform
  3.    Decreasing the acceleration head
  4.    None of these
 Discuss Question
Answer: Option B. -> Making the friction in pipe uniform
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3179. Foot valve provided in the pump is a ______________ valve?
  1.    Direction control
  2.    Back pressure
  3.    Relief
  4.    Pressure reduction
 Discuss Question
Answer: Option B. -> Back pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3180. The head loss in turbulent flow in a pipe varies_________________?
  1.    Directly as the velocity
  2.    Inversely as the square of the velocity
  3.    Approximately as the square of the velocity
  4.    Inversely as the square of the diameter
 Discuss Question
Answer: Option C. -> Approximately as the square of the velocity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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