Hydraulic Machines

Centrifugal pump is started with its delivery valve __________________?

Byadmin January 23, 2019August 15, 2021

Centrifugal pump is started with its delivery valve __________________?

A. kept fully closed
B. kept fully open
C. irrespective of any position
D. kept 50% open
E. none of the above

Hydraulic Machines

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?

A. high initial and maintenance cost
B. lower discharge
C. lower speed of operation
D. necessity of air vessel
E. all of the above

Read More Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
Hydraulic Machines

The optimum value of vane exit angle for a centrifugal pump impeller is_________________?

The optimum value of vane exit angle for a centrifugal pump impeller is_________________?

A. 10-15°
B. 20-25°
C. 30-40°
D. 50-60°
E. 80-90°.

Read More The optimum value of vane exit angle for a centrifugal pump impeller is_________________?
Hydraulic Machines | Mechanical Engineering

The cavitation in a hydraulic machine is mainly due to

Question: The cavitation in a hydraulic machine is mainly due to
[A].

low velocity
[B].
high velocity
[C].
low pressure
[D].
high pressure

Answer: Option C

Explanation:

No answer description available for this question.

Read More The cavitation in a hydraulic machine is mainly due to
Hydraulic Machines | Mechanical Engineering

A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?

Question: A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?
[A].

Pelton wheel with one nozzle
[B].
Pelton wheel with two or more nozzles
[C].
Kaplan turbine
[D].
Francis turbine

Answer: Option A

Explanation:

No answer description available for this question.

Read More A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?
Hydraulic Machines | Mechanical Engineering

A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.

Question: A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.
[A].

True
[B].
False

Answer: Option B

Explanation:

No answer description available for this question.

Read More A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.
Hydraulic Machines | Mechanical Engineering

In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.

Question: In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.
[A].

True
[B].
False

Answer: Option A

Explanation:

No answer description available for this question.

Read More In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.

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