Centrifugal
Axial flow
Mixed flow
Reciprocating
D. Reciprocating
Net head
Absolute velocity
Blade velocity
Flow
Potential Energy
Strain Energy
Kinetic energy
None of these
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
Delivers unit discharge under unit head
Delivers unit discharge under unit speed
Develops unit power under unit head
Develops unit power under unit speed
Geometric similarity
Kinematic similarity
Dynamic similarity
None of these
(N√Q)/H2/3
(N√Q)/H3/4
(N√Q)/H
(N√Q)/H5/4
39.2 %
49.2 %
68.8 %
84.8 %
(W/p) × (A/a)
(p/W) × (a/A)
(W/p) × (a/A)
(p/W) × (A/a)
Propeller turbine
Francis turbine
Impulse turbine
None of the above
Waste valve closes suddenly
Supply pipe is long
Supply pipe is short
Ram chamber is large
Radial
Axial
Centrifugal
Vortex
1/√2
1/2
1
√2
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
Hydraulic
Mechanical
Overall
None of these
Diameter
Square of diameter
Cube of diameter
Fourth power of diameter
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.
Greater than 15°
Greater than 8°
Greater than 5°
Less than 8°
N/√H
N/H
N/H3/2
N/H²
Closed
Open
Depends on starting condition and flow desired
Could be either open or closed
0.26
0.36
0.46
0.56
To break the jet of water
To bring the runner to rest in a short time
To change the direction of runner
None of these
0.50 to 0.65
0.65 to 0.75
0.75 to 0.85
0.85 to 0.90
ηh = ηo × ηm
ηm = ηm × ηh
ηo = ηh × ηm
None of these
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
Volute casing
Volute casing with guide blades
Vortex casing
Any one of these
High initial and maintenance cost
Lower discharge
Lower speed of operation
Necessity of air vessel
Low velocity
High velocity
Low pressure
High pressure
N√P / H3/2
N√P / H²
N√P / H5/4
N√P / H3
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed