Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
B. Mixed flow pump
Kept fully closed
Kept fully open
Irrespective of any position
Kept 50% open
Speed and power developed
Discharge and power developed
Speed and head of water
Speed, power developed and head of water
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.
Radial
Axial
Centrifugal
Vortex
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
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
Girad turbine
Turgo turbine
Pelton wheel
Kaplan turbine
Air lift pump
Jet pump
Hydraulic coupling
Hydraulic press
An axial flow
An inward flow
An outward flow
A mixed flow
Product
Difference
Sum
None of these
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.
10 r.p.m.
20 r.p.m.
40 r.p.m.
80 r.p.m.
Volute casing
Volute casing with guide blades
Vortex casing
Any one of these
Low head
High head
High head and low discharge
Low head and high discharge
Directly proportional to N
Inversely proportional to N
Directly proportional to N²
Inversely proportional to N²
waV / 2g
waV / g
waV² / 2g
waV² / 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
N/√H
N/H
N/H3/2
N/H²
Centrifugal pump
Reciprocating pump
Air lift pump
Screw pump
39.2 %
49.2 %
68.8 %
84.8 %
Manometric efficiency
Mechanical efficiency
Overall efficiency
Volumetric efficiency
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
0.26
0.36
0.46
0.56
(D/2d) + 5
(D/2d) + 10
(D/2d) + 15
(D/2d) + 20
[2(Vr - v) v]/ Vr²
2(Vr + v) v]/ Vr²
[(Vr - v) v]/ Vr
[(Vr + v) v]/ Vr
Same
0.75 B.H.P.
B.H.P./0.75
1.5 B.H.P.
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
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
Proportional to diameter of impeller
Proportional to speed of impeller
Proportional to diameter and speed of impeller
None of the above
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