10 r.p.m.
20 r.p.m.
40 r.p.m.
80 r.p.m.
B. 20 r.p.m.
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
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Decreases
Increases
Remain same
None of these
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
ηh = ηo × ηm
ηm = ηm × ηh
ηo = ηh × ηm
None of these
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
Q = π.D.Vf
Q = π.b.Vf
Q = π.D.bf.V
Q = D.b.Vf
2 to 4
4 to 8
8 to 16
16 to 24
10° to 15°
15° to 20°
20° to 25°
25° to 30°
Ratio of diameters
Square of ratio of diameters
Inverse ratio of diameters
Square of inverse ratio of diameters
Low velocity
High velocity
Low pressure
High pressure
Medium head application from 24 to 180 m
Low head installation up to 30 m
High head installation above 180 m
All types of heads
L.A.N
2 L.A.N
(L.A.N)/60
(2 L.A.N)/60
1/√2
1/2
1
√2
Pelton wheel
Kaplan turbine
Francis turbine
None of these
Impulse turbines
Reaction turbines
Axial flow turbines
Mixed flow turbines
Inlet of draft rube
Blade inlet
Guide blade
Penstock
Girad turbine
Turgo turbine
Pelton wheel
Kaplan turbine
Radial
Axial
Centrifugal
Vortex
Power produced by the turbine to the energy actually supplied by the turbine
Actual work available at the turbine to energy imparted to the wheel
Workdone on the wheel to the energy (or head of water) actually supplied to the turbine
None of the above
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
(1 + cos φ)/2
(1 - cos φ)/2
(1 + sin φ)/2
(1 - sin φ)/2
Greater than 15°
Greater than 8°
Greater than 5°
Less than 8°
39.2 %
48.8 %
84.8 %
88.4 %
To transport water downstream without eddies
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
For safety of turbine
To increase flow rate
102 watts
75 watts
550 watts
735 watts
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
Causes noise and vibration of various parts
Reduces the discharge of a turbine
Causes sudden drop in power output and efficiency
All of the above
Give high discharge
Produce high heads
Pump viscous fluids
All of these