Directly proportional to N
Inversely proportional to N
Directly proportional to N²
Inversely proportional to N²
A. Directly proportional to N
Designing new impeller
Trimming the impeller size to the required size by machining
Not possible
Some other alterations in the impeller
0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s
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
Impulse turbines
Reaction turbines
Axial flow turbines
Mixed flow turbines
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
0.15 to 0.3
0.4 to 0.5
0.6 to 0.9
1 to 1.5
Air lift pump
Jet pump
Hydraulic coupling
Hydraulic press
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
Greater than 15°
Greater than 8°
Greater than 5°
Less than 8°
An axial flow
An inward flow
An outward flow
A mixed flow
High initial and maintenance cost
Lower discharge
Lower speed of operation
Necessity of air vessel
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
Horizontal
Nearly horizontal
Steep
First rise and then fall
4
6
8
12
Diameter
Square of diameter
Cube of diameter
Fourth power of diameter
Discharge a diameter
Head a speed²
Head a diameter
Power a speed⁴
Centrifugal pump
Mixed flow pump
Axial flow pump
Any one of the above
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
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
Kinetic head
Velocity head
Manometric head
Static head
No flow will take place
Cavitation will be formed
Efficiency will be low
Excessive power will be consumed
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
P/ √H
P/ H
P/ H3/2
P/ H²
Proportional to diameter of impeller
Proportional to speed of impeller
Proportional to diameter and speed of impeller
None of the above
Hydraulic ram
Hydraulic intensifier
Hydraulic torque converter
Hydraulic accumulator
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
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
39.2 %
48.8 %
84.8 %
88.4 %
One-half
One-third
Two-third
Three-fourth
Q/√H
Q/H
Q/H3/2
Q/H²