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
D. All of the above
Directly proportional to H1/2
Inversely proportional to H1/2
Directly proportional to H3/2
Inversely proportional to H3/2
Allow the water to enter the runner without shock
Allow the water to flow over them, without forming eddies
Allow the required quantity of water to enter the turbine
All of the above
Installing the turbine below the tail race level
Using stainless steel runner of the turbine
Providing highly polished blades to the runner
All of the above
An axial flow
An inward flow
An outward flow
A mixed flow
Directly proportional
Inversely proportional
4th power
None of these
An axial flow
An inward flow
An outward flow
A mixed flow
Net head
Absolute velocity
Blade velocity
Flow
Tangential flow impulse turbine
Inward flow impulse turbine
Outward flow impulse turbine
Inward flow reaction turbine
Product
Difference
Sum
None of these
Closed
Open
Depends on starting condition and flow desired
Could be either open or closed
waVr /g × (Vr + v)
waVr /g × (Vr - v)
waVr /g × (Vr + v)²
waVr /g × (Vr - v)²
0.25 m3/s
0.5 m3/s
1.5 m3/s
2.5 m3/s
Impulse turbines
Reaction turbines
Axial flow turbines
Mixed flow turbines
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
0.15 to 0.3
0.4 to 0.5
0.6 to 0.9
1 to 1.5
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.
Discharge a diameter
Head a speed²
Head a diameter
Power a speed⁴
175.4 r.p.m.
215.5 r.p.m.
241.5 r.p.m.
275.4 r.p.m
One-fourth
One-half
Three-fourth
Double
Proportional to diameter of impeller
Proportional to speed of impeller
Proportional to diameter and speed of impeller
None of the above
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
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
Flow vs. swept volume
Pressure in cylinder vs. swept volume
Flow vs. speed
Pressure vs. speed
To transport water downstream without eddies
To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
For safety of turbine
To increase flow rate
Have identical velocities
Are equal in size and shape
Are identical in shape, but differ only in size
Have identical forces
Screw pump
Gear pump
Cam and piston pump
Plunger pump
Pelton wheel
Francis turbine
Kaplan turbine
None of these
Directly as the air or gas density
Inversely as square root of density
Inversely as density
As square of density
Centrifugal pump
Axial flow pump
Mixed flow pump
Reciprocating pump
10 r.p.m.
20 r.p.m.
40 r.p.m.
80 r.p.m.