Engineering Board Exam Reviewer · Fluid Mechanics · easy

For a centrifugal pump, the power required varies with speed N as:

1. P N
2. P N2
3. P N3
4. P N1/2

Answer

C. P N3

Solution

Doubling the speed requires about 8 times the power.

More Fluid Mechanics questions

1. For geometrically similar centrifugal pumps (affinity laws), the flow rate varies with speed N as:
2. The minimum pressure head above vapor pressure required at a pump inlet to avoid cavitation is called the:
3. Which pump is most commonly used for large flow rates at moderate heads?
4. Which of the following turbines is an impulse turbine?
5. The power developed by a hydraulic turbine is given by:
6. The power required by a pump is given by:
7. The thin layer near a solid surface where viscous effects are significant is called the:
8. The discharge over a rectangular weir is proportional to:
9. The discharge over a 90° V-notch (triangular) weir is proportional to:
10. A weir is used to:

All Fluid Mechanics Reviewer questions