Propeller turbine
Francis turbine
Impulse turbine
Any one of the above
C. Impulse turbine
Designing new impeller
Trimming the impeller size to the required size by machining
Not possible
Some other alterations in the impeller
Girad turbine
Turgo turbine
Pelton wheel
Kaplan turbine
They have slow speeds
They are suitable even for low water heads
They give constant efficiency, even if the discharge is not constant
All of the above
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
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
An axial flow
An inward flow
An outward flow
A mixed flow
Hydraulic
Mechanical
Overall
None of these
High initial and maintenance cost
Lower discharge
Lower speed of operation
Necessity of air vessel
The centrifugal pump is suitable for large discharge and smaller heads.
The centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.
The efficiency of centrifugal pump is less as compared to reciprocating pump.
All of the above
N/√H
N/H
N/H3/2
N/H²
Give high discharge
Produce high heads
Pump viscous fluids
All of these
Centrifugal pump
Reciprocating pump
Jet pump
Air lift pump
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
Propeller turbine
Francis turbine
Impulse turbine
None of the above
Smoothen flow
Reduce acceleration to minimum
Increase pump efficiency
Save pump from cavitations
0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s
Propeller turbine
Francis turbine
Impulse turbine
Any one of the above
Sum
Difference
Product
None of these
Kinetic head
Velocity head
Manometric head
Static head
[2(Vr - v) v]/ Vr²
2(Vr + v) v]/ Vr²
[(Vr - v) v]/ Vr
[(Vr + v) v]/ Vr
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
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 mixed flow at outlet
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
175.4 r.p.m.
215.5 r.p.m.
241.5 r.p.m.
275.4 r.p.m
24.8 r.p.m.
48.2 r.p.m
82.4 r.p.m.
248 r.p.m
Slow speed pump with radial flow at outlet
Medium speed pump with radial flow at outlet
High speed pump with radial flow at outlet
High speed pump with axial flow at outlet
Directly as fan speed
Square of fan speed
Cube of fan speed
Square root of fan speed
Centrifugal
Axial flow
Mixed flow
Reciprocating
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