Centrifugal pump

Mixed flow pump

Axial flow pump

Any one of the above

B. Mixed flow pump

No flow will take place

Cavitation will be formed

Efficiency will be low

Excessive power will be consumed

L.A.N

2 L.A.N

(L.A.N)/60

(2 L.A.N)/60

Centrifugal pump

Reciprocating pump

Jet pump

Airlift pump

1/√2

1/2

1

√2

_{m}) / (Q × η_{o})

_{m} Q) / η_{o}

_{m} × η_{o})

_{o}) / H_{m}

Manometric efficiency

Mechanical efficiency

Overall efficiency

Volumetric efficiency

Impulse turbines

Reaction turbines

Axial flow turbines

Mixed flow turbines

Sum

Difference

Product

None of these

P/ √H

P/ H

^{3/2}

P/ H²

Of such a size that it delivers unit discharge at unit head

Of such a size that it delivers unit discharge at unit power

Of such a size that it requires unit power per unit head

Of such a size that it produces unit horse power with unit head

Lift and resultant force

Drag and resultant force

Lift and tangential force

Lift and drag

Directly as the air or gas density

Inversely as square root of density

Inversely as density

As square of density

Decreases

Increases

Remain same

None of these

175.4 r.p.m.

215.5 r.p.m.

241.5 r.p.m.

275.4 r.p.m

The water flows parallel to the axis of the wheel

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

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

The flow of water is partly radial and partly axial

Centrifugal pump

Mixed flow pump

Axial flow pump

Any one of the above

Fourneyron turbine

Journal turbine

Thomson's turbine

Pelton wheel

Closed

Open

Depends on starting condition and flow desired

Could be either open or closed

Give high discharge

Produce high heads

Pump viscous fluids

All of these

Potential Energy

Strain Energy

Kinetic energy

None of these

Speed and power developed

Discharge and power developed

Speed and head of water

Speed, power developed and head of water

Girad turbine

Turgo turbine

Pelton wheel

Kaplan turbine

0.15 to 0.3

0.4 to 0.5

0.6 to 0.9

1 to 1.5

Proportional to diameter of impeller

Proportional to speed of impeller

Proportional to diameter and speed of impeller

None of the above

Impeller diameter

Speed

Fluid density

Both (A) and (B) above

102 watts

75 watts

550 watts

735 watts

They have slow speeds

They are suitable even for low water heads

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

All of the above

One-fourth

One-half

Three-fourth

Double

Radial

Axial

Centrifugal

Vortex

10-15°

20-25°

30-40°

50-60°