Hydraulic
Mechanical
Overall
None of these
B. Mechanical
[wa (V - v)]/2g
[wa (V - v)]/g
[wa (V - v)²]/2g
[wa (V - v²)]/g
Full load speed
The speed at which turbine runner will be damaged
The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
The speed corresponding to maximum overload permissible
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.
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
Friction loss
Cavitations
Static head
Loss of kinetic energy
0 to 25 m
25 m to 250 m
Above 250 m
None of these
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
Radial
Axial
Centrifugal
Vortex
Two cylinders, two rams and a storage device
A cylinder and a ram
Two coaxial rams and two cylinders
A cylinder, a piston, storage tank and control valve
Geometric similarity
Kinematic similarity
Dynamic similarity
None of these
2 to 4
4 to 8
8 to 16
16 to 24
Ratio of actual discharge to the theoretical discharge
Sum of actual discharge and the theoretical discharge
Difference of theoretical discharge and the actual discharge
Product of theoretical discharge and the actual discharge
N√P / H3/2
N√P / H²
N√P / H5/4
N√P / H3
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
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
Potential Energy
Strain Energy
Kinetic energy
None of these
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
4
6
8
12
Propeller turbine
Francis turbine
Impulse turbine
None of the above
waV / 2g
waV / g
waV² / 2g
waV² / g
(W/p) × (A/a)
(p/W) × (a/A)
(W/p) × (a/A)
(p/W) × (A/a)
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
The reaction turbines are used for low head and high discharge.
The angle of taper on draft tube is less than 8°.
An impulse turbine is generally fitted slightly above the tail race.
A Francis turbine is an impulse turbine.
39.2 %
48.8 %
84.8 %
88.4 %
Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator
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.
Slow speed with radial flow at outlet
Medium speed with radial flow at outlet
High speed with radial flow at outlet
High speed with axial flow at outlet
Strain
Pressure
Kinetic
None of these
Centrifugal pump
Reciprocating pump
Jet pump
Airlift pump