Hydraulic Machines problems
- 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
Correct Answer: directly proportional to H1/2
- 2. 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.
Discuss
Correct Answer:
- 3. 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
Correct Answer: an inward flow
- 4. 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
Correct Answer: 0.15 to 0.3
- 5. The cavitation in a hydraulic machine is mainly due to
Options- A. low velocity
- B. high velocity
- C. low pressure
- D. high pressure Discuss
Correct Answer: low pressure
- 6. The Furneyron turbine is __________ reaction turbine.
Options- A. an axial flow
- B. an inward flow
- C. an outward flow
- D. a mixed flow Discuss
Correct Answer: an outward flow
- 7. The head available at the inlet of the turbine is known as net or effective head.
Options- A. Correct
- B. Incorrect Discuss
Correct Answer: Correct
- 8. A Francis turbine is an outward flow reaction turbine.
Options- A. True
- B. False Discuss
Correct Answer: False
- 9. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?
Options- A. Hydraulic ram
- B. Hydraulic intensifier
- C. Hydraulic torque converter
- D. Hydraulic accumulator Discuss
Correct Answer: Hydraulic torque converter
- 10. In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.
Options- A. parallel
- B. perpendicular Discuss
Correct Answer: parallel
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