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MCQs

Total Questions : 3218 | Page 4 of 322 pages
Question 31. Reciprocating pumps compared to centrifugal pumps
  1.    Deliver liquid at uniform pressure
  2.    Can handle slurries more efficiently
  3.    Are not subject to air binding
  4.    Can be operated with delivery valve closed
 Discuss Question
Answer: Option C. -> Are not subject to air binding
Question 32. Mass velocity in case of steady flow and through a constant cross-section conduit is independent of the
  1.    Temperature
  2.    Pressure
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 33. For pipes that must be broken at intervals for maintenance, the connector used should be a/an
  1.    Union
  2.    Tee
  3.    Reducer
  4.    Elbow
 Discuss Question
Answer: Option A. -> Union
Question 34. Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an
  1.    Pitot tube
  2.    Venturimeter
  3.    Orificemeter
  4.    Rotameter
 Discuss Question
Answer: Option A. -> Pitot tube
Question 35. With the increase in depth, the hydrostatic pressure in an unaccelerated incompressible fluid (in a constant gravitational field)
  1.    Decreases
  2.    Increases linearly
  3.    Increases exponentially
  4.    Remains constant
 Discuss Question
Answer: Option B. -> Increases linearly
Question 36. While starting a centrifugal pump, its delivery valve should be kept
  1.    Opened
  2.    Closed
  3.    Either opened or closed ; it does not make any difference
  4.    Either opened or closed; depending on the fluid viscosity
 Discuss Question
Answer: Option B. -> Closed
Question 37. While starting an axial flow pump, its delivery valve should be kept
  1.    Open
  2.    Closed
  3.    Either open or closed
  4.    None of these
 Discuss Question
Answer: Option A. -> Open
Question 38. Pressure drag does not depend upon the
  1.    Roughness of surface of the body
  2.    Pressure of main flow only
  3.    Length of the body in flow direction
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 39. Which of the following is the most common pump for pumping either raw sewage or sludge?
  1.    Electromagnetic pump
  2.    Centrifugal pump
  3.    Reciprocating pump
  4.    Gear pump
 Discuss Question
Answer: Option C. -> Reciprocating pump
Question 40. The equivalent diameter for pressure drop calculation for a duct of square cross-section is given by(where, x = each side of the square duct)
  1.    x
  2.    πx
  3.    2x
  4.    x/2
 Discuss Question
Answer: Option A. -> x

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