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Mechanical Engineering : Hydraulic Machines - Quiz(MCQ)
A)
Mechanical Energy
B)
Elastic Energy
C)
Nuclear Energy
D)
Electrical Energy

Correct Answer : Option (A) :   Mechanical Energy


Explanation : Hydraulic machines firstly convert the energy possessed by water into mechanical energy. Later it can be transformed into electrical energy.

A)
Braggs law
B)
Faraday law
C)
Charles law
D)
Newton’s second law

Correct Answer : Option (D) :   Newton’s second law


Explanation : A Hydraulic Machine uses the principle of momentum which states that a force is generated which is utilized in a turbine.

A)
Switch off the turbine
B)
To regenerate the power
C)
Alter the direction of water
D)
To regulate the wind speed

Correct Answer : Option (C) :   Alter the direction of water


Explanation : Turbines use blades and buckets to alter the direction of water. It is used to change the momentum of water. As momentum changes, force is produced to rotate the shaft of a hydraulic machine.

A)
low velocity
B)
high velocity
C)
low pressure
D)
high pressure

Correct Answer : Option (C) :   low pressure

A)
N/H
B)
N/√H
C)
N/H²
D)
N/H³

Correct Answer : Option (B) :   N/√H

A)
impeller
B)
casing
C)
suction pipe
D)
delivery pipe

Correct Answer : Option (D) :   delivery pipe

A)
True
B)
False
C)
Can Not Say
D)
None of the above

Correct Answer : Option (B) :   False

A)
directly
B)
inversely
C)
Can Not Say
D)
None of the above

Correct Answer : Option (A) :   directly

9 .
The force exerted (in newton) by a jetof water impinging normally on a fixed plate is (where w = Specific weight of water in N/m³, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)
A)
waV/g
B)
waV/2g
C)
waV²/g
D)
waV²/2g

Correct Answer : Option (C) :   waV²/g

10 .
The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))
A)
P/√H
B)
P/H
C)
P/H2
D)
P/H3/2

Correct Answer : Option (D) :   P/H3/2