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Mechanical Engineering - Hydraulic Machines

Exercise : Hydraulic Machines - Section 1
6.
Discharge of a centrifugal pump is
directly proportional to diameter of its impeller
inversely proportional to diameter of its impeller
directly proportional to (diameter)2 of its impeller
inversely proportional to (diameter)2 of its impeller
Answer: Option
Explanation:

Discharge of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller.

Head of a centrifugal pump is directly proportional to (Diameter)^2 of its impeller.

Power Developed of a centrifugal pump is directly proportional to (Diameter)^4 of its impeller.

7.
A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is
0.25 kW
0.75 kW
1.75 kW
3.75 kW
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.
product
difference
sum
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
hydraulic
mechanical
overall
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Geometric similarity is said to exist between the model and the prototype, if both of them
have identical velocities
are equal in size and shape
are identical in shape, but differ only in size
have identical forces
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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