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MCQs

Total Questions : 3147 | Page 37 of 315 pages
Question 361. The critical depth for a channel is given by (where q = Unit discharge (discharge per unit width) through the channel)
  1.    (q/g)1/2
  2.    (q²/g)1/3
  3.    (q³/g)1/4
  4.    (q⁴/g)1/5
 Discuss Question
Answer: Option B. -> (q²/g)1/3
Question 362. The hydraulic gradient line lies over the centre line of the pipe by an amount equal to the
  1.    Pressure head
  2.    Velocity head
  3.    Pressure head + velocity head
  4.    Pressure head - velocity head
 Discuss Question
Answer: Option A. -> Pressure head
Question 363. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water
  1.    51 cm
  2.    50 cm
  3.    52 cm
  4.    52.2 cm
 Discuss Question
Answer: Option A. -> 51 cm
Question 364. In a venturi-flume, the flow takes place at
  1.    Atmospheric pressure
  2.    Gauge pressure
  3.    Absolute pressure
  4.    None of these
 Discuss Question
Answer: Option A. -> Atmospheric pressure
Question 365. The buoyancy depends on
  1.    Mass of liquid displaced
  2.    Viscosity of the liquid
  3.    Pressure of the liquid displaced
  4.    Depth of immersion
 Discuss Question
Answer: Option A. -> Mass of liquid displaced
Question 366. 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
 Discuss Question
Answer: Option B. -> Actual work-done by the pump to the energy supplied to the pump by the prime mover
Question 367. Mechanical 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
 Discuss Question
Answer: Option A. -> Energy available at the impeller to the energy supplied to the pump by the prime mover
Question 368. 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
 Discuss Question
Answer: Option B. -> 3.0 m
Question 369. 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
 Discuss Question
Answer: Option B. -> Notch
Question 370. 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
 Discuss Question
Answer: Option A. -> 0.1 N-s/m2

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