Mechanical efficiency of a centrifugal pump is the ratio of
Options:
A. Energy available at the impeller to the energy supplied to the pump by the prime mover
B. Actual work-done by the pump to the energy supplied to the pump by the prime mover
C. Energy supplied to the pump to the energy available at the impeller
D. Manometric head to the energy supplied by the impeller per kN of water


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Answer: Option A


More Questions on This Topic :

Question 1. The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is
  1.    2.4 m
  2.    3.0 m
  3.    4.0 m
  4.    5.0 m
Answer: Option B
Question 2. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called
  1.    Weir
  2.    Notch
  3.    Orifice
  4.    None of these
Answer: Option B
Question 3. One poise is equal to
  1.    0.1 N-s/m2
  2.    1 N-s/m2
  3.    10 N-s/m2
  4.    100 N-s/m2
Answer: Option A
Question 4. Overall efficiency of a centrifugal pump is the ratio of
  1.    Energy available at the impeller to the energy supplied to the pump by the prime mover
  2.    Actual work-done by the pump to the energy supplied to the pump by the prime mover
  3.    Energy supplied to the pump to the energy available at the impeller
  4.    Manometric head to the energy supplied by the impeller per kN of water
Answer: Option B
Question 5. The buoyancy depends on
  1.    Mass of liquid displaced
  2.    Viscosity of the liquid
  3.    Pressure of the liquid displaced
  4.    Depth of immersion
Answer: Option A
Question 6. In a venturi-flume, the flow takes place at
  1.    Atmospheric pressure
  2.    Gauge pressure
  3.    Absolute pressure
  4.    None of these
Answer: Option A