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Mechanical Engineering - Hydraulic Machines

Exercise : Hydraulic Machines - Section 1
1.
Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.
diameter
square of diameter
cube of diameter
fourth power of diameter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
The mechanical efficiency of an impulse turbine is
ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
ratio of the actual work available at the turbine to the energy imparted to the wheel
ratio of the Work done on the wheel to the energy of the jet
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
The overshot water wheels are those in which the wheel runs entirely by the __________ of water.
weight
impulse
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
In a Kaplan turbine runner, the number of blades are generally between
2 to 4
4 to 8
8 to l6
16 to 24
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
H = Hg/hf
H = Hg x hf
H = Hg + hf
H = Hg - hf
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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