Discussion
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- Question
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle ? with the jet is
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. A hydraulic coupling belongs to the category of
Options- A. power absorbing machines
- B. power developing machines
- C. energy transfer machines
- D. energy generating machines Discuss
- 2. The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
Options- A. hydraulic
- B. mechanical
- C. overall Discuss
- 3. The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
Options- A. True
- B. False Discuss
- 4. Multi-stage centrifugal pumps are used to
Options- A. give high discharge
- B. produce high heads
- C. pump viscous fluids
- D. all of these Discuss
- 5. In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.
Options- A. True
- B. False Discuss
- 6. In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.
Options- A. Agree
- B. Disagree Discuss
- 7. A Francis turbine is used when the available head of water is
Options- A. 0 to 25 m
- B. 25 m to 250 m
- C. above 250 m
- D. none of these Discuss
- 8. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
Options- A.
- B.
- C.
- D.
Discuss
- 9. Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)
Options- A. Q = ?.D.Vf
- B. Q = ?.b.Vf
- C. Q = ?.D.b.Vf
- D. Q = D.b.Vf Discuss
- 10. The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as
Options- A. manometric efficiency
- B. mechanical efficiency
- C. overall efficiency
- D. volumetric efficiency Discuss
Hydraulic Machines problems
Search Results
Correct Answer: energy transfer machines
Correct Answer: mechanical
Correct Answer: True
Correct Answer: produce high heads
Correct Answer: True
Correct Answer: Disagree
Correct Answer: 25 m to 250 m
Correct Answer:
Correct Answer: Q = ?.D.b.Vf
Correct Answer: volumetric efficiency
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