Hydraulic Machines problems
- 1. Which of the following pump is suitable for small discharge and high heads?
Options- A. Centrifugal pump
- B. Axial flow pump
- C. Mixed flow pump
- D. Reciprocating pump Discuss
Correct Answer: Reciprocating pump
- 2. In a centrifugal pump, the regulating valve is provided on the
Options- A. casing
- B. delivery pipe
- C. suction pipe
- D. impeller Discuss
Correct Answer: delivery pipe
- 3. Which of the following is not an impulse turbine?
Options- A. Girad turbine
- B. Turgo turbine
- C. Pelton wheel
- D. Kaplan turbine Discuss
Correct Answer: Kaplan turbine
- 4. Which of the following pump is sucessfully used for lifting water to the boilers?
Options- A. Centrifugal pump
- B. Reciprocating pump
- C. Jet pump
- D. Air-lift pump Discuss
Correct Answer: Jet pump
- 5. The specific speed of a centrifugal pump may be defined as the speed of an imaginary pump, identical with the given pump, which will discharge one litre of water, while it is being raised through a head of one metre.
Options- A. True
- B. False Discuss
Correct Answer: True
- 6. In a reaction turbine, the water enters the wheel under pressure and flows over the vanes.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 7. A hydraulic press is a device used
Options- A. to store pressure energy which may be supplied to a machine later on
- B. to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
- C. to lift larger load by the application of a comparatively much smaller force
- D. all of the above Discuss
Correct Answer: to lift larger load by the application of a comparatively much smaller force
- 8. Slip of a reciprocating pump is negative, when
Options- A. suction pipe is short and pump is running at low speeds
- B. delivery pipe is long and pump is running at high speeds
- C. suction pipe is short and delivery pipe is long and the pump is running at low speeds
- D. suction pipe is long and delivery pipe is short and the pump is running at high speeds Discuss
Correct Answer: suction pipe is long and delivery pipe is short and the pump is running at high speeds
- 9. Manometric head is the actual head of water against which a centrifugal pump has to work.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 10. The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is
Options- A.
- B.
- C.
- D.
Discuss
Correct Answer:
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