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Which of the following statement is correct as regard to water wheels?

Hydraulic Machines, Mechanical Engineering /
Question: Which of the following statement is correct as regard to water wheels?
[A].

They have slow speeds.

[B].

They are suitable even for low water heads.

[C].

They give constant efficiency, even if the discharge is not constant

[D].

all of the above

Answer: Option D

Explanation:

No answer description available for this question.

Which of the following statement is correct as regard to water wheels? Read More »

Hydraulic Machines, Mechanical Engineering

The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.

Hydraulic Machines, Mechanical Engineering /
Question: The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water. Read More »

Hydraulic Machines, Mechanical Engineering

A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)

Hydraulic Machines, Mechanical Engineering /
Question: A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
[A].

[B].

[C].

[D].

Answer: Option B

Explanation:

No answer description available for this question.

A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship) Read More »

Hydraulic Machines, Mechanical Engineering

A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is __________ of the jet velocity

Hydraulic Machines, Mechanical Engineering /
Question: A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is __________ of the jet velocity
[A].

one-half

[B].

one-third

[C].

two-third

[D].

three-fourth

Answer: Option B

Explanation:

No answer description available for this question.

A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is __________ of the jet velocity Read More »

Hydraulic Machines, Mechanical Engineering

A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where α and β = Inlet and outlet angles of the jet respectively)

Hydraulic Machines, Mechanical Engineering /
Question: A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where α and β = Inlet and outlet angles of the jet respectively)
[A].

[B].

[C].

[D].

Answer: Option A

Explanation:

No answer description available for this question.

A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where α and β = Inlet and outlet angles of the jet respectively) Read More »

Hydraulic Machines, Mechanical Engineering

A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.

Hydraulic Machines, Mechanical Engineering /
Question: A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.
[A].

True

[B].

False

Answer: Option B

Explanation:

No answer description available for this question.

A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero. Read More »

Hydraulic Machines, Mechanical Engineering

For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is
[A].

zero

[B].

20

[C].

50

[D].

100

Answer: Option D

Explanation:

No answer description available for this question.

For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning

The alignment circle is marked on the psychrometric chart at

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning /
Question: The alignment circle is marked on the psychrometric chart at
[A].

20°C DBT and 50% RH

[B].

26°C DBT and 50% RH

[C].

20°C DBT and 60% RH

[D].

26°C DBT and 60% RH

Answer: Option B

Explanation:

No answer description available for this question.

The alignment circle is marked on the psychrometric chart at Read More »

Heat Transfer, Mechanical Engineering, Refrigeration and Air Conditioning