Question: Manometric head is the actual head of water against which a centrifugal pump has to work.
[A].Correct
Incorrect
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
Mechanical Engineering
Manometric head, in case of a centrifugal pump, is equal to
Question: Manometric head, in case of a centrifugal pump, is equal to
[A].Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe
Workdone per kN of water – Losses within the impeller
Energy per kN at outlet of impeller – Energy per kN at inlet of impeller
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this 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.
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
False
[A].
[B].
Answer: Option A
Explanation:
No answer description available for this question.
Which of the following statement is wrong ?
Question: Which of the following statement is wrong ?
[A].The reaction turbines are used for low head and high discharge.
The angle of taper on draft tube is less than 8°.
An impulse turbine is generally fitted slightly above the tail race.
A Francis turbine is an impulse turbine.
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
The cavitation in reaction turbines is avoided, to a great extent by
Question: The cavitation in reaction turbines is avoided, to a great extent by
[A].installing the turbine below the tail race level
using stainless steel runner of the turbine
providing highly polished blades to the runner
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
The cavitation in a hydraulic machine
Question: The cavitation in a hydraulic machine
[A].causes noise and vibration of various parts
reduces the discharge of a turbine
causes sudden drop in power output and efficiency
all of the above
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
The cavitation in a hydraulic machine is mainly due to
Question: The cavitation in a hydraulic machine is mainly due to
[A].low velocity
high velocity
low pressure
high pressure
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
Question: A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
[A].0.26
0.36
0, 46
0.56
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
A draft tube is used with impulse turbines.
Question: A draft tube is used with impulse turbines.
[A].Yes
No
[A].
[B].
Answer: Option B
Explanation:
No answer description available for this 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 ?
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
Pelton wheel with two or more nozzles
Kaplan turbine
Francis turbine
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.