(N√Q)/H2/3
(N√Q)/H3/4
(N√Q)/H
(N√Q)/H5/4
B. (N√Q)/H3/4
In an impulse turbine, the water impinges on the buckets with pressure energy.
In a reaction turbine, the water glides over the moving vanes with kinetic energy.
In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes.
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
0.50 to 0.65
0.65 to 0.75
0.75 to 0.85
0.85 to 0.90
Waste valve closes suddenly
Supply pipe is long
Supply pipe is short
Ram chamber is large
0.15 to 0.3
0.4 to 0.5
0.6 to 0.9
1 to 1.5
Propeller turbine
Francis turbine
Impulse turbine
Any one of the above
Geometric similarity
Kinematic similarity
Dynamic similarity
None of these
Double
Three times
Four times
Five times
Proportional to diameter of impeller
Proportional to speed of impeller
Proportional to diameter and speed of impeller
None of the above
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
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
High discharge
High head
Pumping of viscous fluids
High head and high discharge
Manometric efficiency
Mechanical efficiency
Overall efficiency
Volumetric efficiency
N/√H
N/H
N/H3/2
N/H²
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.
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
None of the above
An axial flow
An inward flow
An outward flow
A mixed flow
Low head of water
High head of water
Medium head of water
High discharge
Equal to
1.2 times
1.8 times
Double
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
Flow vs. swept volume
Pressure in cylinder vs. swept volume
Flow vs. speed
Pressure vs. speed
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
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
Adjustable blades
Backward curved blades
Vaned diffusion casing
Inlet guide blades
Remain same
Increases
Decreases
None of these
Centrifugal pump
Reciprocating pump
Air lift pump
Screw pump
2 to 4
4 to 8
8 to 16
16 to 24
Lift and resultant force
Drag and resultant force
Lift and tangential force
Lift and drag