Specific speed for reaction turbines ranges from

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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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Which of the following pump is successfully used for lifting water from deep wells?

A. Centrifugal pump

B. Reciprocating pump

C. Jet pump

D. Air lift pump

Discuss this answer

One horsepower is equal to

A. 102 watts

B. 75 watts

C. 550 watts

D. 735 watts

Discuss this answer

In a centrifugal pump, the regulating valve is provided on the

A. Casing

B. Delivery pipe

C. Suction pipe

D. Impeller

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The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is

A. η_h = η_o × η_m

B. η_m = η_m × η_h

C. η_o = η_h × η_m

D. None of these

Discuss this answer

According to fan laws, at constant speed and capacity, the pressure 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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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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By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

A. 39.2 %

B. 48.8 %

C. 84.8 %

D. 88.4 %

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The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

A. L.A.N

B. 2 L.A.N

C. (L.A.N)/60

D. (2 L.A.N)/60

Discuss this answer

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

Discuss this answer

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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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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High specific speed of turbine implies it is

A. Propeller turbine

B. Francis turbine

C. Impulse turbine

D. None of the above

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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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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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A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

A. Kinetic head

B. Velocity head

C. Manometric head

D. Static head

Discuss this answer

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

Discuss this answer

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

Discuss this answer

The depth of the bucket for a Pelton wheel is generally ________ the diameter of jet.

A. Equal to

B. 1.2 times

C. 1.8 times

D. Double

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Delivery head of a centrifugal pump is

A. Directly proportional to N

B. Inversely proportional to N

C. Directly proportional to N²

D. Inversely proportional to N²

Discuss this answer

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

Discuss this answer

In centrifugal pumps, maximum efficiency is obtained when the blades are

A. Straight

B. Bent forward

C. Bent backward

D. Radial

Discuss this answer

The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

A. 40 %

B. 50 %

C. 60 %

D. 80 %

Discuss this answer

A double overhung Pelton wheel has

A. Two jets

B. Two runners

C. Four jets

D. Four runners

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A turbine pump is basically a centrifugal pump equipped additionally with

A. Adjustable blades

B. Backward curved blades

C. Vaned diffusion casing

D. Inlet guide blades

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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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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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The speed 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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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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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 static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

A. Product

B. Difference

C. Sum

D. None of these

Discuss this answer

Accepted Answer

B. 10 to 100

Specific speed for reaction turbines ranges from

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

Which of the following pump is successfully used for lifting water from deep wells?

One horsepower is equal to

In a centrifugal pump, the regulating valve is provided on the

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is

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

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

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

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

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

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)

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

High specific speed of turbine implies it is

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

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

A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

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

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

The depth of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Delivery head of a centrifugal pump is

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

In centrifugal pumps, maximum efficiency is obtained when the blades are

The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

A double overhung Pelton wheel has

A turbine pump is basically a centrifugal pump equipped additionally with

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)

Medium specific speed of turbine implies it is

The speed ratio in case of Francis turbine varies from

In an inward flow reaction turbine

The jet ratio is defined as the ratio of the

The static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

Also checkout

Specific speed for reaction turbines ranges from

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

Which of the following pump is successfully used for lifting water from deep wells?

One horsepower is equal to

In a centrifugal pump, the regulating valve is provided on the

The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

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

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

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

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

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

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)

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

High specific speed of turbine implies it is

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

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

A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the

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

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

The depth of the bucket for a Pelton wheel is generally ________ the diameter of jet.

Delivery head of a centrifugal pump is

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

In centrifugal pumps, maximum efficiency is obtained when the blades are

The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

A double overhung Pelton wheel has

A turbine pump is basically a centrifugal pump equipped additionally with

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)

Medium specific speed of turbine implies it is

The speed ratio in case of Francis turbine varies from

In an inward flow reaction turbine

The jet ratio is defined as the ratio of the

The static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

Also checkout

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is

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)