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- Question
Discharge of a centrifugal pump is
Options- A. directly proportional to diameter of its impeller
- B. inversely proportional to diameter of its impeller
- C. directly proportional to (diameter)2 of its impeller
- D. inversely proportional to (diameter)2 of its impeller
- Correct Answer
- inversely proportional to (diameter)2 of its impeller
- 1. Discharge of a centrifugal pump is (where N = Speed of the pump impeller)
Options- A. directly proportional to N
- B. inversely proportional to N
- C. directly proportional to N2
- D. inversely proportional to N2 Discuss
- 2. The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
Options- A. 40%
- B. 50%
- C. 60%
- D. 80% Discuss
- 3. The speed of a turbine runner 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
- 4. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is
Options- A. 0.25 kW
- B. 0.75 kW
- C. 1.75 kW
- D. 3.75 kW Discuss
- 5. Slip of a reciprocating pump is defined as the
Options- A. ratio of actual discharge to the theoretical discharge
- B. sum of actual discharge and the theoretical discharge
- C. difference of theoretical discharge and the actual discharge
- D. product of theoretical discharge and the actual discharge Discuss
- 6. Geometric similarity is said to exist between the model and the prototype, if both of them
Options- A. have identical velocities
- B. are equal in size and shape
- C. are identical in shape, but differ only in size
- D. have identical forces Discuss
- 7. The unit discharge through the turbine is
Options- A.
- B.
- C.
- D.
Discuss
- 8. A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
Options- A. kinetic head
- B. velocity head
- C. manometric head
- D. static head Discuss
- 9. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly
Options- A. 1.05
- B. 2.86
- C. 6.65
- D. 10.05 Discuss
- 10. The cylinder dimensions of a compound engine may be designed on the basis of
Options- A. equal power developed in each cylinder for uniform turning moment
- B. equal initial piston loads on all pistons for obtaining same size of piston rod, connecting rod etc. for all cylinders
- C. equal temperature drop in each cylinder for economy of steam
- D. all of the above Discuss
Hydraulic Machines problems
Search Results
Correct Answer: directly proportional to N
Correct Answer: 50%
Correct Answer: directly proportional to H1/2
Correct Answer: 1.75 kW
Correct Answer: difference of theoretical discharge and the actual discharge
Correct Answer: are identical in shape, but differ only in size
Correct Answer:
Correct Answer: manometric head
Correct Answer: 2.86
Correct Answer: all of the above
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