Top 50+ Solved Hydraulics Machines MCQ Questions Answer
Q. Delivery head of a centrifugal pump is
a. directly proportional to N
b. inversely proportional to N
c. directly proportional to N2
d. inversely proportional to N2
Q. The discharge through a turbine is
a. directly proportional to H1/2
b. inversely proportional to H1/2
c. directly proportional to H3/2
d. inversely proportional to H3/2
Q. The flow ratio of Francis turbine is defined as the ratio of the
a. velocity of flow at inlet to the theoretical jet velocity
b. theoretical velocity of jet to the velocity of flow at inlet
c. velocity of runner at inlet to the velocity of flow at inlet
d. none of the above
Q. Which of the following is not a reaction turbine?
a. Furneyron turbine
b. Jonval turbine
c. Thomson's turbine
d. Pelton wheel
Q. A hydraulic ram is a device used to
a. store the energy of water
b. increase the pressure of water
c. to lift water from deep wells
d. to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
Q. Which of the following pump is suitable for small discharge and high heads?
a. Centrifugal pump
b. Axial flow pump
c. Mixed flow pump
d. Reciprocating pump
Q. In a Kaplan turbine runner, the number of blades are generally between
a. 2 to 4
b. 4 to 8
c. 8 to 16
d. 16 to 24
Q. A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is
a. 175.4 r.p.m.
b. 215.5 r.p.m.
c. 241.5 r.p.m.
d. 275.4 r.p.m.
Q. Which of the following trubine is preferred for 0 to 25 m head of water?
a. Pelton wheel
b. Kaplan turbine
c. Francis turbine
d. none of these
Q. In order to avoid cavitation in centrifugal pumps
a. the suction pressure should be high
b. the delivery pressure should be high
c. the suction pressure should be low
d. the delivery pressure should be low