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- Question
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
- Correct Answer
- manometric head
- 1. The unit discharge through the turbine is
Options- A.
- B.
- C.
- D.
Discuss
- 2. 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
- 3. 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 Discuss
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.
Options- A. Correct
- B. Incorrect Discuss
- 9. An air preheater is installed
Options- A. before the economiser
- B. before the superheater
- C. between the economiser and chimney
- D. none of these Discuss
- 10. In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to
Options- A. water space also
- B. chimney
- C. steam space
- D. superheater Discuss
Hydraulic Machines problems
Search Results
Correct Answer:
Correct Answer: are identical in shape, but differ only in size
Correct Answer: inversely proportional to (diameter)2 of its impeller
Correct Answer: directly proportional to N
Correct Answer: 50%
Correct Answer: 2.86
Correct Answer: all of the above
Correct Answer: Correct
Correct Answer: between the economiser and chimney
Correct Answer: steam space
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