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
B. The water enters at the centre of the wheel and then flows towards the outer periphery of the wheel
39.2 %
49.2 %
68.8 %
84.8 %
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
0 to 25 m
25 m to 250 m
Above 250 m
None of these
Fourneyron turbine
Journal turbine
Thomson's turbine
Pelton wheel
Kept fully closed
Kept fully open
Irrespective of any position
Kept 50% open
To run the turbine full
To prevent air to enter the turbine
To increase the head of water by an amount equal to the height of the runner outlet above the tail race
To transport water to downstream
Centrifugal
Axial flow
Mixed flow
Reciprocating
Power absorbing machines
Power developing machines
Energy transfer machines
Energy generating machines
0 to 4.5
10 to 100
80 to 200
250 to 300
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
Straight
Bent forward
Bent backward
Radial
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.
39.2 %
48.8 %
84.8 %
88.4 %
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
Manometric efficiency
Mechanical efficiency
Overall efficiency
Volumetric efficiency
N√P / H3/2
N√P / H²
N√P / H5/4
N√P / H3
Two jets
Two runners
Four jets
Four runners
Equal to
1.2 times
1.8 times
Double
0.15 to 0.3
0.4 to 0.5
0.6 to 0.9
1 to 1.5
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
Pelton wheel with one nozzle
Pelton wheel with two or more nozzles
Kaplan turbine
Francis turbine
waV/2g × sinθ
waV/g × sinθ
waV²/2g × sin2θ
waV²/g × sinθ
Horizontal
Nearly horizontal
Steep
First rise and then fall
40 %
50 %
60 %
80 %
Centrifugal
Axial flow
Reciprocating
Mixed flow
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator
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
Smoothen flow
Reduce acceleration to minimum
Increase pump efficiency
Save pump from cavitations