Sail E0 Webinar

MCQs

Total Questions : 3147 | Page 38 of 315 pages
Question 371. The hammer blow in pipes occurs when
  1.    There is excessive leakage in the pipe
  2.    The pipe bursts under high pressure of fluid
  3.    The flow of fluid through the pipe is suddenly brought to rest by closing of the valve
  4.    The flow of fluid through the pipe is gradually brought to rest by closing of the valve
 Discuss Question
Answer: Option C. -> The flow of fluid through the pipe is suddenly brought to rest by closing of the valve
Question 372. One horsepower is equal to
  1.    102 watts
  2.    75 watts
  3.    550 watts
  4.    735 watts
 Discuss Question
Answer: Option D. -> 735 watts
Question 373. Practical fluids
  1.    Are viscous
  2.    Possess surface tension
  3.    Are compressible
  4.    Possess all the above properties
 Discuss Question
Answer: Option D. -> Possess all the above properties
Question 374. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is
  1.    39.2%
  2.    48.8%
  3.    84.8%
  4.    88.4%
 Discuss Question
Answer: Option A. -> 39.2%
Question 375. For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred
  1.    Centrifugal
  2.    Axial flow
  3.    Reciprocating
  4.    Mixed flow
 Discuss Question
Answer: Option B. -> Axial flow
Question 376. For small discharge at high pressure, following pump is preferred
  1.    Centrifugal
  2.    Axial flow
  3.    Mixed flow
  4.    Reciprocating
 Discuss Question
Answer: Option D. -> Reciprocating
Question 377. Multistage centrifugal pumps are used to
  1.    Give high discharge
  2.    Produce high heads
  3.    Pump viscous fluids
  4.    All of these
 Discuss Question
Answer: Option B. -> Produce high heads
Question 378. Manometric head, in case of a centrifugal pump, is equal to
  1.    Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
  2.    Work-done per kN of water Losses within the impeller
  3.    Energy per kN at outlet of impeller Energy per kN at inlet of impeller
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 379. General energy equation holds for
  1.    Steady flow
  2.    Turbulent flow
  3.    Laminar flow
  4.    Non-uniform flow
 Discuss Question
Answer: Option D. -> Non-uniform flow
Question 380. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of
  1.    High initial and maintenance cost
  2.    Lower discharge
  3.    Lower speed of operation
  4.    Necessity of air vessel
 Discuss Question
Answer: Option A. -> High initial and maintenance cost

Latest Videos

Latest Test Papers