Which type of the pump is different from others in the same group?

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Which type of the pump is different from others in the same group?

A. Screw pump

B. Gear pump

C. Cam and piston pump

D. Plunger pump

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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 maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

A. (1 + cos φ)/2

B. (1 - cos φ)/2

C. (1 + sin φ)/2

D. (1 - sin φ)/2

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In order to avoid cavitation in centrifugal pumps

A. The suction pressure should be high

B. The delivery pressure should be high

C. The suction pressure should be low

D. The delivery pressure should be low

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By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

A. 39.2 %

B. 48.8 %

C. 84.8 %

D. 88.4 %

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The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

A. Normal speed

B. Unit speed

C. Specific speed

D. None of these

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

A. Centrifugal pump

B. Reciprocating pump

C. Jet pump

D. Air lift pump

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A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

A. 175.4 r.p.m.

B. 215.5 r.p.m.

C. 241.5 r.p.m.

D. 275.4 r.p.m

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For centrifugal pump impeller, the maximum value of the vane exit angle is

A. 10° to 15°

B. 15° to 20°

C. 20° to 25°

D. 25° to 30°

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Specific speed for reaction turbines ranges from

A. 0 to 4.5

B. 10 to 100

C. 80 to 200

D. 250 to 300

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In impulse Turbine, energy available at the inlet is in the form of

A. Potential Energy

B. Strain Energy

C. Kinetic energy

D. None of these

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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

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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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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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Discharge of a centrifugal pump is

A. Directly proportional to diameter of its impeller

B. Inversely proportional to diameter of its impeller

C. Directly proportional to (diameter)² of its impeller

D. Inversely proportional to (diameter)² of its impeller

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In an inward 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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Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

A. Hydraulic ram

B. Hydraulic intensifier

C. Hydraulic torque converter

D. Hydraulic accumulator

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The power produced by the reaction turbine is ________ to the head of water.

A. Directly proportional

B. Inversely proportional

C. 4th power

D. None of these

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A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is

A. 0.25 kW

B. 0.75 kW

C. 1.75 kW

D. 3.75 kW

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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 discharge through a turbine is

A. Directly proportional to H^1/2

B. Inversely proportional to H^1/2

C. Directly proportional to H^3/2

D. Inversely proportional to H^3/2

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The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

A. [wa (V - v)]/2g

B. [wa (V - v)]/g

C. [wa (V - v)²]/2g

D. [wa (V - v²)]/g

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Head developed by a centrifugal pump is

A. Proportional to diameter of impeller

B. Proportional to speed of impeller

C. Proportional to diameter and speed of impeller

D. None of the above

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The jet ratio is defined as the ratio of the

A. Diameter of jet to the diameter of Pelton wheel

B. Velocity of jet to the velocity of Pelton wheel

C. Diameter of Pelton wheel to the diameter of jet

D. Velocity of Pelton wheel to the velocity of jet

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The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Crosssectional area of jet in m², and V = Velocity of jet in m/s)

A. waV / 2g

B. waV / g

C. waV² / 2g

D. waV² / g

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Low specific speed of a pump implies it is

A. Centrifugal pump

B. Mixed flow pump

C. Axial flow pump

D. None of the above

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Kinematic 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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Which place in hydraulic turbine is most susceptible for cavitations?

A. Inlet of draft rube

B. Blade inlet

C. Guide blade

D. Penstock

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Slip of a reciprocating pump is negative, when

A. Suction pipe is short and pump is running at low speeds

B. Delivery pipe is long and pump is running at high speeds

C. Suction pipe is short and delivery pipe is long and the pump is running at low speeds

D. Suction pipe is long and delivery pipe is short and the pump is running at high speeds

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

A. Rectilinear flow

B. Radial flow

C. Free vortex motion

D. Forced vortex

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Accepted Answer

D. Plunger pump

Which type of the pump is different from others in the same group?

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

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 maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

In order to avoid cavitation in centrifugal pumps

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

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

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

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

For centrifugal pump impeller, the maximum value of the vane exit angle is

Specific speed for reaction turbines ranges from

In impulse Turbine, energy available at the inlet is in the form of

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

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

Centrifugal pump is started with its delivery valve

Discharge of a centrifugal pump is

In an inward flow reaction turbine

Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

The power produced by the reaction turbine is ________ to the head of water.

A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is

The flow ratio in case of Francis turbine varies from

The discharge through a turbine is

The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

Head developed by a centrifugal pump is

The jet ratio is defined as the ratio of the

The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Crosssectional area of jet in m², and V = Velocity of jet in m/s)

Low specific speed of a pump implies it is

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

Which place in hydraulic turbine is most susceptible for cavitations?

Slip of a reciprocating pump is negative, when

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

Also checkout

Which type of the pump is different from others in the same group?

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

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 maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

In order to avoid cavitation in centrifugal pumps

By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

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

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

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

For centrifugal pump impeller, the maximum value of the vane exit angle is

Specific speed for reaction turbines ranges from

In impulse Turbine, energy available at the inlet is in the form of

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

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

Centrifugal pump is started with its delivery valve

Discharge of a centrifugal pump is

In an inward flow reaction turbine

Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

The power produced by the reaction turbine is ________ to the head of water.

A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is

The flow ratio in case of Francis turbine varies from

The discharge through a turbine is

The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

Head developed by a centrifugal pump is

The jet ratio is defined as the ratio of the

The force exerted (in Newton) by a jet of water impinging normally on a fixed plate is (where w = Specific weight of water in N/m3, a = Crosssectional area of jet in m², and V = Velocity of jet in m/s)

Low specific speed of a pump implies it is

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

Which place in hydraulic turbine is most susceptible for cavitations?

Slip of a reciprocating pump is negative, when

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

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)