MCQOPTIONS
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MCQOPTIONS
This section includes 25 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The cups at the periphery of the Pelton wheel are __________ |
| A. | equiangular |
| B. | equidistant |
| C. | equimolar |
| D. | none of the mentioned |
| Answer» C. equimolar | |
| 2. |
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is? |
| A. | 0.26 |
| B. | 0.36 |
| C. | 0.46 |
| D. | 0.56 |
| Answer» E. | |
| 3. |
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is? |
| A. | 84.8% |
| B. | 74.8% |
| C. | 64.8% |
| D. | 54.8% |
| Answer» B. 74.8% | |
| 4. |
The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, will be? |
| A. | 40% |
| B. | 50% |
| C. | 60% |
| D. | 80% |
| Answer» C. 60% | |
| 5. |
The working of which of the following hydraulic units is based on Pascal’s law? |
| A. | Hydraulic coupling |
| B. | Air lift pump |
| C. | Jet pump |
| D. | Hydraulic press |
| Answer» E. | |
| 6. |
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? |
| A. | overall efficiency |
| B. | volumetric efficiency |
| C. | manometric efficiency |
| D. | mechanical efficiency |
| Answer» C. manometric efficiency | |
| 7. |
In a reciprocating pump, air vessels are used to __________ |
| A. | increase delivery head |
| B. | reduce suction head |
| C. | smoothen the flow |
| D. | reduce acceleration head |
| Answer» E. | |
| 8. |
If the ratios of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have __________ |
| A. | kinematic similarity |
| B. | geometric similarity |
| C. | dynamic similarity |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
The hydraulic efficiency of a reaction turbine is the ratio of __________ |
| A. | actual work available at the turbine to energy imparted to the wheel |
| B. | power produced by the turbine to the energy actually supplied by the turbine |
| C. | work done on the wheel to the energy actually supplied to the turbine |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 10. |
In a Francis turbine runner, the number of blades are generally between __________ |
| A. | 2 to 4 |
| B. | 8 to 16 |
| C. | 4 to 8 |
| D. | 16 to 24 |
| Answer» E. | |
| 11. |
The impeller of a centrifugal pump may have __________ |
| A. | vortex casing |
| B. | volute casing |
| C. | volute casing with guide blades |
| D. | any of the mentioned |
| Answer» E. | |
| 12. |
Kinematic similarity is said to exist between the model and the prototype, if both of them __________ |
| A. | are equal in size and shape |
| B. | have identical velocities |
| C. | are identical in shape, but differ only in size |
| D. | have identical forces |
| Answer» C. are identical in shape, but differ only in size | |
| 13. |
WHICH_OF_THE_FOLLOWING_PUMP_IS_GENERALLY_USED_TO_PUMP_HIGHLY_VISCOUS_FLUID??$ |
| A. | Air lift pump |
| B. | Centrifugal pump |
| C. | Screw pump |
| D. | Reciprocating pump |
| Answer» B. Centrifugal pump | |
| 14. |
By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is$ |
| A. | 84.8% |
| B. | 74.8% |
| C. | 64.8% |
| D. | 54.8% |
| Answer» B. 74.8% | |
| 15. |
The_maximum_efficiency_of_jet_propulsion_of_a_ship_with_inlet_orifices_at_right_angles_to_the_direction_of_motion_of_ship,_will_be$ |
| A. | 40% |
| B. | 50% |
| C. | 60% |
| D. | 80% |
| Answer» C. 60% | |
| 16. |
The cups at the periphery of the Pelton wheel are? |
| A. | equiangular |
| B. | equidistant |
| C. | equimolar |
| D. | none of the mentioned |
| Answer» C. equimolar | |
| 17. |
A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is |
| A. | 0.26 |
| B. | 0.36 |
| C. | 0.46 |
| D. | 0.56 |
| Answer» E. | |
| 18. |
The working of which of the following hydraulic units is based on Pascal’s law?# |
| A. | Hydraulic coupling |
| B. | Air lift pump |
| C. | Jet pump |
| D. | Hydraulic press |
| Answer» E. | |
| 19. |
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 |
| A. | overall efficiency |
| B. | volumetric efficiency |
| C. | manometric efficiency |
| D. | mechanical efficiency |
| Answer» C. manometric efficiency | |
| 20. |
In a reciprocating pump, air vessels are used to |
| A. | increase delivery head |
| B. | reduce suction head |
| C. | smoothen the flow |
| D. | reduce acceleration head |
| Answer» E. | |
| 21. |
If the ratios of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have. |
| A. | kinematic similarity |
| B. | geometric similarity |
| C. | dynamic similarity |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 22. |
The hydraulic efficiency of a reaction turbine, is the ratio of |
| A. | actual work available at the turbine to energy imparted to the wheel |
| B. | power produced by the turbine to the energy actually supplied by the turbine |
| C. | work done on the wheel to the energy actually supplied to the turbine |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 23. |
In a Francis turbine runner, the number of blades are generally between |
| A. | 2 to 4 |
| B. | 8 to 16 |
| C. | 4 to 8 |
| D. | 16 to 24 |
| Answer» E. | |
| 24. |
The impeller of a centrifugal pump may have |
| A. | vortex casing |
| B. | volute casing |
| C. | volute casing with guide blades |
| D. | any of the mentioned |
| Answer» E. | |
| 25. |
Kinematic similarity is said to exist between the model and the prototype, if both of them |
| A. | are equal in size and shape |
| B. | have identical velocities |
| C. | are identical in shape, but differ only in size |
| D. | have identical forces |
| Answer» C. are identical in shape, but differ only in size | |