Top 550+ Solved Fluid Mechanics and Hydraulic Machines MCQ Questions Answer
Q. Which of the following serious problems arise from cavitation?
a. Noise and vibration.
b. Damage to blade surface.
c. Fall in efficiency.
d. All of the above.
Q. A Kaplan turbine is
a. An inward flow impulse turbine
b. Low head axial flow turbine
c. High head axial flow turbine
d. High head mixed flow turbine.
Q. An impulse turbine requires
a. High head and small quantity of flow
b. Low head and small quantity of flow
c. Low head and high rate of flow
d. None of the above
Q. ......of a turbine is defined as the ratio of power available at the turbine shaft to the power supplied by the water jet.
a. Mechanical efficiency
b. Hydraulic efficiency
c. Overall efficiency
d. Volumetric efficiency.
Q. The ratio of power developed by the runner to the power supplied by the jet at entrance to the turbine isknown as
a. Hydraulic efficiency
b. Mechanical efficiency
c. Volumetric efficiency
d. Overall efficiency.
Q. The water which acts on the runner blades of a reaction turbine is under a pressure
a. Equal to atmospheric
b. Below atmospheric
c. Above atmospheric
d. None of the above.
Q. The runner passages of a reaction turbine are
a. Partially filled with water
b. Always completely filled with water
c. Never filled with water
d. None of the above.
Q. The value of speed ratio (Ku) in case of a Francis turbine ranges from
a. 0.2 to 0.3
b. 0.4 to 0.5
c. 0.6 to 0.9
d. None of the above.
Q. The value of flow ratio (Kf) in case of a Francis turbine varies from:
a. 0.1 to 0.14
b. 0.15 to 0.30
c. 0.35 to 0.5
d. 0.6 to 0.9.
Q. A Kaplan turbine claims which of the following advantages over a Francis turbine?
a. More compact in construction and smaller in size.
b. Partload efficiency is considerably high.
c. Low frictional losses.
d. All of the above.
Q. Which of the following draft tubes is suited particularly for helical flow?
a. Conical type draft tube.
b. Elbow type draft tube.
c. Moody’s spreading draft tube.
d. None of the above.
Q. Which of the following surge tank is also called a throttled surge tank?
a. Inclined surge tank.
b. Expansion chamber surge tank.
c. Restricted orifice surge tank.
d. None of the above
Q. Which of the following types of impeller is used for centrifugal pumps dealing with muds?
a. One-side shrouded
b. Two -sides shrouded
c. Double section
d. Open.
Q. Which of the following statements is correct with reference to an impeller with backward curved vanes?
a. It has a falling head - discharge characteristic.
b. It has rising head - discharge characteristic
c. It is easier to fabricate.
d. It cannot run at speeds other than the design spee
Q. The head developed by a centrifugal pump may be expressed as
a. H = (Vw2 u2 + Vw1 u2)/g
b. H = Vw2 u2 /g
c. H = Vw1 u1 /g
d. None of the above.