Rectilinear flow
Radial flow
Free vortex motion
Forced vortex
C. Free vortex motion
Velocity of flow at inlet to the theoretical jet velocity
Theoretical velocity of jet to the velocity of flow at inlet
Velocity of runner at inlet to the velocity of flow at inlet
None of the above
Radially, axially
Axially, radially
Axially, axially
Radially, radially
To store pressure energy which may be supplied to a machine later on
To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
To lift larger load by the application of a comparatively much smaller force
All of the above
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
Give high discharge
Produce high heads
Pump viscous fluids
All of these
Casing
Delivery pipe
Suction pipe
Impeller
39.2 %
49.2 %
68.8 %
84.8 %
Same quantity of liquid
0.75 Q
Q/0.75
1.5 Q
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
Same
0.75 B.H.P.
B.H.P./0.75
1.5 B.H.P.
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
waV/2g × sinθ
waV/g × sinθ
waV²/2g × sin2θ
waV²/g × sinθ
Two
Four
Six
Eight
At full load
At which there will be no damage to the runner
Corresponding to maximum overload permissible
At which the turbine will run freely without load
Ratio of the actual power produced by the turbine to the energy actually supplied by the turbine
Ratio of the actual work available at the turbine to the energy imparted to the wheel
Ratio of the Work done on the wheel to the energy of the jet
None of the above
2 to 4
4 to 8
8 to 16
16 to 24
(w Hm) / (Q × ηo)
(w Hm Q) / ηo
(w Q) / (Hm × ηo)
(w Q ηo) / Hm
Accumulating oil
Supplying large quantities of oil for very short duration
Generally high pressures to operate hydraulic machines
Supplying energy when main supply fails
10-15°
20-25°
30-40°
50-60°
39.2 %
49.2 %
68.8 %
84.8 %
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
Centrifugal pump
Reciprocating pump
Air lift pump
Screw pump
At the level of tail race
Little above the tail race
Slightly below the tail race
About 2.5 m above the tail race to avoid cavitations.
Girad turbine
Turgo turbine
Pelton wheel
Kaplan turbine
No flow will take place
Cavitation will be formed
Efficiency will be low
Excessive power will be consumed
Centrifugal
Axial flow
Reciprocating
Mixed flow
Pelton wheel
Francis turbine
Kaplan turbine
None of these
Greater than 15°
Greater than 8°
Greater than 5°
Less than 8°
Pelton wheel with one nozzle
Pelton wheel with two or more nozzles
Kaplan turbine
Francis turbine
0.25 kW
0.75 kW
1.75 kW
3.75 kW