Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
C. Cube of fan speed
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
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
(1 + cos φ)/2
(1 - cos φ)/2
(1 + sin φ)/2
(1 - sin φ)/2
0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s
Manometric efficiency
Mechanical efficiency
Overall efficiency
Volumetric efficiency
Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator
Centrifugal pump
Mixed flow pump
Axial flow pump
None of the above
Horizontal
Nearly horizontal
Steep
First rise and then fall
One-fourth
One-half
Three-fourth
Double
Directly proportional to diameter of its impeller
Inversely proportional to diameter of its impeller
Directly proportional to (diameter)² of its impeller
Inversely proportional to (diameter)² of its impeller
waVr /g × (Vr + v)
waVr /g × (Vr - v)
waVr /g × (Vr + v)²
waVr /g × (Vr - v)²
Proportional to diameter of impeller
Proportional to speed of impeller
Proportional to diameter and speed of impeller
None of the above
Discharge a diameter
Head a speed²
Head a diameter
Power a speed⁴
40 %
50 %
60 %
80 %
10° to 15°
15° to 20°
20° to 25°
25° to 30°
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.
Strain
Pressure
Kinetic
None of these
10 r.p.m.
20 r.p.m.
40 r.p.m.
80 r.p.m.
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
2 to 4
4 to 8
8 to 16
16 to 24
Ratio of diameters
Square of ratio of diameters
Inverse ratio of diameters
Square of inverse ratio of diameters
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
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
Waste valve closes suddenly
Supply pipe is long
Supply pipe is short
Ram chamber is large
Lift and resultant force
Drag and resultant force
Lift and tangential force
Lift and drag
Q = π.D.Vf
Q = π.b.Vf
Q = π.D.bf.V
Q = D.b.Vf
Low head
High head
High head and low discharge
Low head and high discharge
N√P / H3/2
N√P / H²
N√P / H5/4
N√P / H3
Rotational flow
Radial
Forced spiral vortex flow
Spiral vortex flow