Same quantity of liquid
0.75 Q
Q/0.75
1.5 Q
A. Same quantity of liquid
Allow the water to enter the runner without shock
Allow the water to flow over them, without forming eddies
Allow the required quantity of water to enter the turbine
All of the above
P/ √H
P/ H
P/ H3/2
P/ H²
Tangential flow impulse turbine
Inward flow impulse turbine
Outward flow impulse turbine
Inward flow reaction turbine
Designing new impeller
Trimming the impeller size to the required size by machining
Not possible
Some other alterations in the impeller
waVr /g × (Vr + v)
waVr /g × (Vr - v)
waVr /g × (Vr + v)²
waVr /g × (Vr - v)²
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
Closed
Open
Depends on starting condition and flow desired
Could be either open or closed
39.2 %
48.8 %
84.8 %
88.4 %
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
Low velocity
High velocity
Low pressure
High pressure
Rectilinear flow
Radial flow
Free vortex motion
Forced vortex
(1 + cos φ)/2
(1 - cos φ)/2
(1 + sin φ)/2
(1 - sin φ)/2
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
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
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
Air lift pump
Jet pump
Hydraulic coupling
Hydraulic press
39.2 %
49.2 %
68.8 %
84.8 %
Normal speed
Unit speed
Specific speed
None of these
Diameter of jet to the diameter of Pelton wheel
Velocity of jet to the velocity of Pelton wheel
Diameter of Pelton wheel to the diameter of jet
Velocity of Pelton wheel to the velocity of jet
Power produced by the turbine to the energy actually supplied by the turbine
Actual work available at the turbine to the 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
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.
Casing
Delivery pipe
Suction pipe
Impeller
24.8 r.p.m.
48.2 r.p.m
82.4 r.p.m.
248 r.p.m
Centrifugal pump
Reciprocating pump
Jet pump
Airlift pump
(N√Q)/H2/3
(N√Q)/H3/4
(N√Q)/H
(N√Q)/H5/4
Centrifugal pump
Mixed flow pump
Axial flow pump
None of the above
0.26
0.36
0.46
0.56
N/√H
N/H
N/H3/2
N/H²
0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s
waV/2g × sinθ
waV/g × sinθ
waV²/2g × sin2θ
waV²/g × sinθ