Smoothen the flow
Reduce suction head
Increase delivery head
Reduce acceleration head
D. Reduce acceleration head
ηh = ηo × ηm
ηm = ηm × ηh
ηo = ηh × ηm
None of these
The wheel runs entirely by the weight of water
The wheel runs entirely by the impulse of water
The wheel runs partly by the weight of water and partly by the impulse of water
None of the above
Give high discharge
Produce high heads
Pump viscous fluids
All of these
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
Girad turbine
Turgo turbine
Pelton wheel
Kaplan turbine
High discharge
High head
Pumping of viscous fluids
High head and high discharge
0.25 kW
0.75 kW
1.75 kW
3.75 kW
Radial
Axial
Centrifugal
Vortex
Two jets
Two runners
Four jets
Four runners
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
The centrifugal pump is suitable for large discharge and smaller heads.
The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.
The efficiency of centrifugal pump is less as compared to reciprocating pump.
All of the above
An axial flow
An inward flow
An outward flow
A mixed flow
Equal to
1.2 times
1.8 times
Double
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Centrifugal pump
Reciprocating pump
Air lift pump
Screw pump
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
Remain same
Increases
Decreases
None of these
Rotational flow
Radial
Forced spiral vortex flow
Spiral vortex flow
Radially, axially
Axially, radially
Axially, axially
Radially, radially
Q = π.D.Vf
Q = π.b.Vf
Q = π.D.bf.V
Q = D.b.Vf
Air lift pump
Jet pump
Hydraulic coupling
Hydraulic press
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
10-15°
20-25°
30-40°
50-60°
(1 + cos φ)/2
(1 - cos φ)/2
(1 + sin φ)/2
(1 - sin φ)/2
Potential Energy
Strain Energy
Kinetic energy
None of these
Energy available at the impeller to the energy supplied to the pump by the prime mover
Actual workdone by the pump to the energy supplied to the pump by the prime mover
Energy supplied to the pump to the energy available at the impeller
Manometric head to the energy supplied by the impeller per kN of water
Energy available at the impeller to the energy supplied to the pump by the prime mover
Actual workdone by the pump to the energy supplied to the pump by the prime mover
Energy supplied to the pump to the energy available at the impeller
Manometric head to the energy supplied by the impeller per kN of water
10° to 15°
15° to 20°
20° to 25°
25° to 30°
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
Workdone per kN of water Losses within the impeller
Energy per kN at outlet of impeller Energy per kN at inlet of impeller
All of the above
Greater than 15°
Greater than 8°
Greater than 5°
Less than 8°