Hydraulics & Fluid Machineries (Set 1)

1. Low specific speed of a pump implies it is

Centrifugal pump

Mixed flow pump

Axial flow pump

None of the above

2. Head developed by a centrifugal pump is

Proportional to diameter of impeller

Proportional to speed of impeller

Proportional to diameter and speed of impeller

None of the above

3. In centrifugal pumps, maximum efficiency is obtained when the blades are

Straight

Bent forward

Bent backward

Radial

4. A double overhung Pelton wheel has

Two jets

Two runners

Four jets

Four runners

5. Medium specific speed of a pump implies it is

Centrifugal pump

Mixed flow pump

Axial flow pump

Any one of the above

6. If the ratios of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

Geometric similarity

Kinematic similarity

Dynamic similarity

None of these

7. The optimum value of vane exit angle for a centrifugal pump impeller is

10-15°

20-25°

30-40°

50-60°

8. Which of the following pump is suitable for small discharge and high heads?

Centrifugal pump

Axial flow pump

Mixed flow pump

Reciprocating pump

9. For small discharge at high pressure, following pump is preferred

Centrifugal

Axial flow

Mixed flow

Reciprocating

10. A hydraulic press is a device used

To store pressure energy which may be supplied to a machine later on

To increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure

To lift larger load by the application of a comparatively much smaller force

All of the above

Hydraulics & Fluid Machineries (Set 1)

Multiple Choice Questions