Indicator diagram of a reciprocating pump is a graph between

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Indicator diagram of a reciprocating pump is a graph between

A. Flow vs. swept volume

B. Pressure in cylinder vs. swept volume

C. Flow vs. speed

D. Pressure vs. speed

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If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

A. Geometric similarity

B. Kinematic similarity

C. Dynamic similarity

D. None of these

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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 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/ H^3/2

D. P/ H²

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Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

A. Lift and resultant force

B. Drag and resultant force

C. Lift and tangential force

D. Lift and drag

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One horsepower is equal to

A. 102 watts

B. 75 watts

C. 550 watts

D. 735 watts

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The optimum value of vane exit angle for a centrifugal pump impeller is

A. 10-15°

B. 20-25°

C. 30-40°

D. 50-60°

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

A. Straight

B. Bent forward

C. Bent backward

D. Radial

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For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

A. Centrifugal

B. Axial flow

C. Reciprocating

D. Mixed flow

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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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In a Francis turbine runner, the numbers of blades are generally between

A. 2 to 4

B. 4 to 8

C. 8 to 16

D. 16 to 24

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Multistage centrifugal pumps are used to obtain

A. High discharge

B. High head

C. Pumping of viscous fluids

D. High head and high discharge

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Maximum impulse will be developed in hydraulic ram when

A. Waste valve closes suddenly

B. Supply pipe is long

C. Supply pipe is short

D. Ram chamber is large

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Which of the following is not a reaction turbine?

A. Fourneyron turbine

B. Journal turbine

C. Thomson's turbine

D. Pelton wheel

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The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A. Delivers unit discharge under unit head

B. Delivers unit discharge under unit speed

C. Develops unit power under unit head

D. Develops unit power under unit speed

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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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When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

A. Horizontal

B. Nearly horizontal

C. Steep

D. First rise and then fall

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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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Slip of a reciprocating pump is defined as the

A. Ratio of actual discharge to the theoretical discharge

B. Sum of actual discharge and the theoretical discharge

C. Difference of theoretical discharge and the actual discharge

D. Product of theoretical discharge and the actual discharge

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In a reciprocating pump, air vessels are used to

A. Smoothen the flow

B. Reduce suction head

C. Increase delivery head

D. Reduce acceleration head

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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 force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

A. waV/2g × sinθ

B. waV/g × sinθ

C. waV²/2g × sin2θ

D. waV²/g × sinθ

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Braking jet in an impulse turbine is used

A. To break the jet of water

B. To bring the runner to rest in a short time

C. To change the direction of runner

D. None of these

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The overall efficiency for a Pelton wheel lies between

A. 0.50 to 0.65

B. 0.65 to 0.75

C. 0.75 to 0.85

D. 0.85 to 0.90

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The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

A. 24.8 r.p.m.

B. 48.2 r.p.m

C. 82.4 r.p.m.

D. 248 r.p.m

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In a centrifugal pump, the liquid enters the pump

A. At the top

B. At the bottom

C. At the canter

D. From sides

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The specific speed of a turbine is given by the equation

A. N√P / H^3/2

B. N√P / H²

C. N√P / H^5/4

D. N√P / H³

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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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The function of guide vanes in a reaction turbine is to

A. Allow the water to enter the runner without shock

B. Allow the water to flow over them, without forming eddies

C. Allow the required quantity of water to enter the turbine

D. All of the above

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The speed of a turbine runner 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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Accepted Answer

B. Pressure in cylinder vs. swept volume

Indicator diagram of a reciprocating pump is a graph between

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

Head developed by a centrifugal pump is

The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).

Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

One horsepower is equal to

The optimum value of vane exit angle for a centrifugal pump impeller 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)

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

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

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

In a Francis turbine runner, the numbers of blades are generally between

Multistage centrifugal pumps are used to obtain

Maximum impulse will be developed in hydraulic ram when

Which of the following is not a reaction turbine?

The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Which of the following statement is correct?

When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

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

Slip of a reciprocating pump is defined as the

In a reciprocating pump, air vessels are used to

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

The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

Braking jet in an impulse turbine is used

The overall efficiency for a Pelton wheel lies between

The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

In a centrifugal pump, the liquid enters the pump

The specific speed of a turbine is given by the equation

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

The function of guide vanes in a reaction turbine is to

The speed of a turbine runner is

Also checkout

Indicator diagram of a reciprocating pump is a graph between

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

Head developed by a centrifugal pump is

The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H).

Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

One horsepower is equal to

The optimum value of vane exit angle for a centrifugal pump impeller is

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)

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

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

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

In a Francis turbine runner, the numbers of blades are generally between

Multistage centrifugal pumps are used to obtain

Maximum impulse will be developed in hydraulic ram when

Which of the following is not a reaction turbine?

The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

Which of the following statement is correct?

When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be

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

Slip of a reciprocating pump is defined as the

In a reciprocating pump, air vessels are used to

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

The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

Braking jet in an impulse turbine is used

The overall efficiency for a Pelton wheel lies between

The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

In a centrifugal pump, the liquid enters the pump

The specific speed of a turbine is given by the equation

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

The function of guide vanes in a reaction turbine is to

The speed of a turbine runner 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)