Discussion
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- Question
The efficiency of a hydraulic press is given by (where W = Weight lifted by ram, P = Force applied on plunger, A = Area of ram, and a = Area of plunger)
Options- A.
- B.
- C.
- D.
- Correct Answer
-
- 1. The discharge through a turbine is
Options- A. directly proportional to H1/2
- B. inversely proportional to H1/2
- C. directly proportional to H3/2
- D. inversely proportional to H3/2 Discuss
- 2. Which of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?
Options- A. Pelton wheel
- B. Francis turbine
- C. Kaplan turbine
- D. none of these Discuss
- 3. The specific speed (Ns) of a centrifugal pump is given by
Options- A.
- B.
- C.
- D.
Discuss
- 4. Mechanical efficiency of a centrifugal pump is the ratio of
Options- A. energy available at the impeller to the energy supplied to the pump by the prime mover
- B. actual workdone by the pump to the energy supplied to the pump by the prime mover
- C. energy supplied to the pump to the energy available at the impeller
- D. manometric head to the energy supplied by the impeller per kN of water Discuss
- 5. A double overhung Pelton wheel has
Options- A. two jets
- B. two runners
- C. four jets
- D. four runners Discuss
- 6. The Thomson's turbine is __________ reaction turbine.
Options- A. an axial flow
- B. an inward flow
- C. an outward flow
- D. a mixed flow Discuss
- 7. The flow ratio in case of Francis turbine varies from
Options- A. 0.15 to 0.3
- B. 0.4 to 0.5
- C. 0.6 to 0.9
- D. 1 to 1.5 Discuss
- 8. The cavitation in a hydraulic machine is mainly due to
Options- A. low velocity
- B. high velocity
- C. low pressure
- D. high pressure Discuss
- 9. The Furneyron turbine is __________ reaction turbine.
Options- A. an axial flow
- B. an inward flow
- C. an outward flow
- D. a mixed flow Discuss
- 10. The head available at the inlet of the turbine is known as net or effective head.
Options- A. Correct
- B. Incorrect Discuss
Hydraulic Machines problems
Search Results
Correct Answer: directly proportional to H1/2
Correct Answer: Francis turbine
Correct Answer:
Correct Answer: energy available at the impeller to the energy supplied to the pump by the prime mover
Correct Answer: two runners
Correct Answer: an inward flow
Correct Answer: 0.15 to 0.3
Correct Answer: low pressure
Correct Answer: an outward flow
Correct Answer: Correct
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