At the top
At the bottom
At the canter
From sides
C. At the canter
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
24.8 r.p.m.
48.2 r.p.m
82.4 r.p.m.
248 r.p.m
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
Decreases
Increases
Remain same
None of these
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.
Casing
Delivery pipe
Suction pipe
Impeller
10° to 15°
15° to 20°
20° to 25°
25° to 30°
Rectilinear flow
Radial flow
Free vortex motion
Forced vortex
Air lift pump
Jet pump
Hydraulic coupling
Hydraulic press
Inlet of draft rube
Blade inlet
Guide blade
Penstock
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
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
Impeller diameter
Speed
Fluid density
Both (A) and (B) above
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
Friction loss
Cavitations
Static head
Loss of kinetic energy
Slow speed with radial flow at outlet
Medium speed with radial flow at outlet
High speed with radial flow at outlet
High speed with mixed flow at outlet
39.2 %
49.2 %
68.8 %
84.8 %
waVr /g × (Vr + v)
waVr /g × (Vr - v)
waVr /g × (Vr + v)²
waVr /g × (Vr - v)²
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
0 to 4.5
10 to 100
80 to 200
250 to 300
Low head of water
High head of water
Medium head of water
High discharge
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
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
Pelton wheel
Francis turbine
Kaplan turbine
None of these
Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet
High speed pump with radial flow at outlet
High speed pump with axial flow at outlet
39.2 %
49.2 %
68.8 %
84.8 %
No flow will take place
Cavitation will be formed
Efficiency will be low
Excessive power will be consumed
Power absorbing machines
Power developing machines
Energy transfer machines
Energy generating machines
(w Hm) / (Q × ηo)
(w Hm Q) / ηo
(w Q) / (Hm × ηo)
(w Q ηo) / Hm