A hydraulic accumulator is a device used to store ________ energy which may be supplied to a machine later on.

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A hydraulic accumulator is a device used to store ________ energy which may be supplied to a machine later on.

A. Strain

B. Pressure

C. Kinetic

D. None of these

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A hydraulic press is a device used

A. To store pressure energy which may be supplied to a machine later on

B. To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure

C. To lift larger load by the application of a comparatively much smaller force

D. All of the above

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Runaway speed of a hydraulic turbine is

A. Full load speed

B. The speed at which turbine runner will be damaged

C. The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

D. The speed corresponding to maximum overload permissible

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Which of the following pump is successfully used for lifting water to the boilers?

A. Centrifugal pump

B. Reciprocating pump

C. Jet pump

D. Airlift pump

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If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

A. No flow will take place

B. Cavitation will be formed

C. Efficiency will be low

D. Excessive power will be consumed

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In a centrifugal pump casing, the flow of water leaving the

A. Radial

B. Axial

C. Centrifugal

D. Vortex

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Which of the following statement is correct?

A. In an impulse turbine, the water impinges on the buckets with pressure energy.

B. In a reaction turbine, the water glides over the moving vanes with kinetic energy.

C. In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.

D. In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes.

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Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

A. Q = π.D.Vf

B. Q = π.b.Vf

C. Q = π.D.bf.V

D. Q = D.b.Vf

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According to fan laws, at constant pressure, the speed capacity and power vary

A. Directly as the air or gas density

B. Inversely as square root of density

C. Inversely as density

D. As square of density

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The impeller of a centrifugal pump may have

A. Volute casing

B. Volute casing with guide blades

C. Vortex casing

D. Any one of these

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The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

A. Manometric efficiency

B. Mechanical efficiency

C. Overall efficiency

D. Volumetric efficiency

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Power required to drive a centrifugal pump is directly proportional to ________ of its impeller.

A. Diameter

B. Square of diameter

C. Cube of diameter

D. Fourth power of diameter

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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

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Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

A. 39.2 %

B. 49.2 %

C. 68.8 %

D. 84.8 %

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Power required (in watts) to drive a centrifugal pump is (where H_m = Manometric head in metres, w = Specific weight in N/m³, Q = Discharge of the pump in m³/s, and η_o = Overall efficiency of the pump)

A. (w H_m) / (Q × η_o)

B. (w H_m Q) / η_o

C. (w Q) / (H_m × η_o)

D. (w Q η_o) / H_m

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The flow ratio of Francis turbine is defined as the ratio of the

A. Velocity of flow at inlet to the theoretical jet velocity

B. Theoretical velocity of jet to the velocity of flow at inlet

C. Velocity of runner at inlet to the velocity of flow at inlet

D. None of the above

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Overall efficiency of a centrifugal pump is the ratio of

A. Energy available at the impeller to the energy supplied to the pump by the prime mover

B. Actual workdone by the pump to the energy supplied to the pump by the prime mover

C. Energy supplied to the pump to the energy available at the impeller

D. Manometric head to the energy supplied by the impeller per kN of water

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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

B. Workdone per kN of water Losses within the impeller

C. Energy per kN at outlet of impeller Energy per kN at inlet of impeller

D. All of the above

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Dynamic similarity is said to exist between the model and the prototype, if both of them

A. Have identical velocities

B. Are equal in size and shape

C. Are identical in shape, but differ only in size

D. None of the above

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Geometric similarity is said to exist between the model and the prototype, if both of them

A. Have identical velocities

B. Are equal in size and shape

C. Are identical in shape, but differ only in size

D. Have identical forces

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In an outward flow reaction turbine

A. The water flows parallel to the axis of the wheel

B. The water enters at the centre of the wheel and then flows towards the outer periphery of the wheel

C. The water enters the wheel at the outer periphery and then flows towards the centre of the wheel

D. The flow of water is partly radial and partly axial

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Pressure intensifier increases the pressure in proportion to

A. Ratio of diameters

B. Square of ratio of diameters

C. Inverse ratio of diameters

D. Square of inverse ratio of diameters

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The flow rate in gear pump

A. Increases with increase in pressure

B. Decreases with increase in pressure

C. More or less remains constant with increase in pressure

D. Unpredictable

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Medium specific speed of turbine implies it is

A. Propeller turbine

B. Francis turbine

C. Impulse turbine

D. Any one of the above

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According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

A. Directly as the air or gas density

B. Inversely as square root of density

C. Inversely as density

D. As square of density

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The flow ratio in case of Francis turbine varies from

A. 0.15 to 0.3

B. 0.4 to 0.5

C. 0.6 to 0.9

D. 1 to 1.5

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The angle of taper on draft tube is

A. Greater than 15°

B. Greater than 8°

C. Greater than 5°

D. Less than 8°

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The discharge through a reaction turbine ________ with the increase in unit speed.

A. Decreases

B. Increases

C. Remain same

D. None of these

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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

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The hydraulic efficiency of an impulse turbine is the

A. Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

B. Ratio of the actual work available at the turbine to the energy imparted to the wheel

C. Ratio of the work done on the wheel to the energy of the jet

D. None of the above

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The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

A. Hydraulic

B. Mechanical

C. Overall

D. None of these

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Accepted Answer

B. Pressure

A hydraulic accumulator is a device used to store ________ energy which may be supplied to a machine later on.

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

A hydraulic press is a device used

Runaway speed of a hydraulic turbine is

Which of the following pump is successfully used for lifting water to the boilers?

If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

In a centrifugal pump casing, the flow of water leaving the

Which of the following statement is correct?

Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

According to fan laws, at constant pressure, the speed capacity and power vary

The impeller of a centrifugal pump may have

The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Power required to drive a centrifugal pump is directly proportional to ________ of its impeller.

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?

Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

Power required (in watts) to drive a centrifugal pump is (where H_m = Manometric head in metres, w = Specific weight in N/m³, Q = Discharge of the pump in m³/s, and η_o = Overall efficiency of the pump)

The flow ratio of Francis turbine is defined as the ratio of the

Overall efficiency of a centrifugal pump is the ratio of

Manometric head, in case of a centrifugal pump, is equal to

Dynamic similarity is said to exist between the model and the prototype, if both of them

Geometric similarity is said to exist between the model and the prototype, if both of them

In an outward flow reaction turbine

Pressure intensifier increases the pressure in proportion to

The flow rate in gear pump

Medium specific speed of turbine implies it is

According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

The flow ratio in case of Francis turbine varies from

The angle of taper on draft tube is

The discharge through a reaction turbine ________ with the increase in unit speed.

Centrifugal pump is started with its delivery valve

The hydraulic efficiency of an impulse turbine is the

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Also checkout

A hydraulic accumulator is a device used to store ________ energy which may be supplied to a machine later on.

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

A hydraulic press is a device used

Runaway speed of a hydraulic turbine is

Which of the following pump is successfully used for lifting water to the boilers?

If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

In a centrifugal pump casing, the flow of water leaving the

Which of the following statement is correct?

Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)

According to fan laws, at constant pressure, the speed capacity and power vary

The impeller of a centrifugal pump may have

The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

Power required to drive a centrifugal pump is directly proportional to ________ of its impeller.

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?

Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of

Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m3, Q = Discharge of the pump in m3/s, and ηo = Overall efficiency of the pump)

The flow ratio of Francis turbine is defined as the ratio of the

Overall efficiency of a centrifugal pump is the ratio of

Manometric head, in case of a centrifugal pump, is equal to

Dynamic similarity is said to exist between the model and the prototype, if both of them

Geometric similarity is said to exist between the model and the prototype, if both of them

In an outward flow reaction turbine

Pressure intensifier increases the pressure in proportion to

The flow rate in gear pump

Medium specific speed of turbine implies it is

According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

The flow ratio in case of Francis turbine varies from

The angle of taper on draft tube is

The discharge through a reaction turbine ________ with the increase in unit speed.

Centrifugal pump is started with its delivery valve

The hydraulic efficiency of an impulse turbine is the

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Also checkout

Power required (in watts) to drive a centrifugal pump is (where H_m = Manometric head in metres, w = Specific weight in N/m³, Q = Discharge of the pump in m³/s, and η_o = Overall efficiency of the pump)