MCQOPTIONS
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MCQOPTIONS
This section includes 12 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. |
Discharge of a centrifugal pump is __________ |
| A. | inversely proportional to (diameter)<sup>2</sup> of its impeller |
| B. | inversely proportional to diameter of its impeller |
| C. | directly proportional to (diameter)<sup>2</sup> of its impeller |
| D. | directly proportional to diameter of its impeller |
| Answer» B. inversely proportional to diameter of its impeller | |
| 2. |
A hydraulic coupling belongs to the category of __________ |
| A. | power absorbing machines |
| B. | energy transfer machines |
| C. | power developing machines |
| D. | energy generating machines |
| Answer» C. power developing machines | |
| 3. |
Multi-stage centrifugal pumps are used to __________ |
| A. | produce high heads |
| B. | give high discharge |
| C. | pump viscous fluids |
| D. | all of the mentioned |
| Answer» B. give high discharge | |
| 4. |
Slip of a reciprocating pump is defined as the __________ |
| A. | sum of actual discharge and the theoretical discharge |
| B. | ratio of actual discharge to the theoretical discharge |
| C. | difference of theoretical discharge and the actual discharge |
| D. | product of theoretical discharge and the actual discharge |
| Answer» D. product of theoretical discharge and the actual discharge | |
| 5. |
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the __________ |
| A. | manometric head |
| B. | velocity head |
| C. | kinetic head |
| D. | static head |
| Answer» B. velocity head | |
| 6. |
Geometric 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. | have identical forces |
| D. | are identical in shape, but differ only in size |
| Answer» E. | |
| 7. |
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as? |
| A. | unit speed |
| B. | terrific speed |
| C. | specific velocity |
| D. | specific speed |
| Answer» E. | |
| 8. |
What is the mechanical efficiency of an impulse turbine? |
| A. | ratio of the actual power produced by the turbine to the energy actually supplied by the turbine |
| B. | ratio of the actual work available at the turbine to the energy imparted to the wheel |
| C. | ratio of the Work done on the wheel to the energy of the jet |
| D. | none of the mentioned |
| Answer» C. ratio of the Work done on the wheel to the energy of the jet | |
| 9. |
Manometric head, in case of a centrifugal pump, is equal to __________ |
| A. | Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe |
| B. | Energy per kN at outlet of impeller Energy per kN at inlet of impeller |
| C. | Workdone per kN of water Losses within the impeller |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
The overall efficiency of a reaction turbine is the ratio of __________ |
| A. | actual work available at the turbine to the energy imparted to the wheel |
| B. | power produced by the turbine to the energy actually supplied by the turbine |
| C. | workdone on the wheel to the energy (or head of water) actually supplied to the turbine |
| D. | none of the mentioned |
| Answer» C. workdone on the wheel to the energy (or head of water) actually supplied to the turbine | |
| 11. |
A Francis turbine is used when the available head of water is? |
| A. | 0 to 25 m |
| B. | 25 to 250 m |
| C. | > 250 m |
| D. | none of the mentioned |
| Answer» C. > 250 m | |
| 12. |
The maximum number of jets, generally, employed in an impulse turbine without jet interference are __________ |
| A. | 2 |
| B. | 6 |
| C. | 7 |
| D. | 5 |
| Answer» B. 6 | |