MCQOPTIONS
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MCQOPTIONS
This section includes 16 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 electricity fraction of total energy output if W1 and Q1 represents the turbine work and heat output is given by? |
| A. | W1 / (W1 + Q1) |
| B. | W1 / (W1 – Q1) |
| C. | W1 / (W1Q1) |
| D. | W1 / Q1 |
| Answer» B. W1 / (W1 – Q1) | |
| 2. |
In a back pressure turbine _____________ |
| A. | pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process |
| B. | pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process |
| C. | pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process |
| D. | none of the mentioned |
| Answer» B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process | |
| 3. |
WHICH_OF_THE_FOLLOWING_IS_A_GOOD_MEDIUM_FOR_CONSTANT_TEMPERATURE_HEATING??$ |
| A. | Water |
| B. | Steam |
| C. | Coolant |
| D. | Diesel |
| Answer» C. Coolant | |
| 4. |
The electricity fraction of total energy output if W1 and Q1 represents the turbine work and heat output is given by?$ |
| A. | W<sub>1</sub> / (W<sub>1</sub> + Q<sub>1</sub>) |
| B. | W<sub>1</sub> / (W<sub>1</sub> – Q<sub>1</sub>) |
| C. | W<sub>1</sub> / (W<sub>1</sub>Q<sub>1</sub>) |
| D. | W<sub>1</sub> / Q<sub>1</sub> |
| Answer» B. W<sub>1</sub> / (W<sub>1</sub> ‚Äö√Ñ√∂‚àö√ë‚àö¬® Q<sub>1</sub>) | |
| 5. |
The_cogeneration_plant_efficiency_nco_if_WT,_Qi,_QH_represents_turbine_work,_heat_input,_heat_output_respectively_is_given_by?$ |
| A. | n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>i</sub>) / Q<sub>H</sub> |
| B. | n<sub>CO</sub> = (W<sub>T</sub> – Q<sub>i</sub>) / Q<sub>H</sub> |
| C. | n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>H</sub>) / Q<sub>i</sub> |
| D. | n<sub>CO</sub> = (W<sub>T</sub> + Q<sub>H</sub>) / Q<sub>i</sub> |
| Answer» E. | |
| 6. |
Which of these is not considered economical for cogeneration? |
| A. | a high fraction of electric to total energy |
| B. | a low fraction of electric to total energy |
| C. | a low fraction of total energy to electric energy |
| D. | none of the mentioned |
| Answer» C. a low fraction of total energy to electric energy | |
| 7. |
Pass-out turbines are used in which of these cases? |
| A. | relatively high back pressure |
| B. | small heating requirement |
| C. | only a |
| D. | both a and b |
| Answer» E. | |
| 8. |
If e is the electricity fraction of the total energy output, m is the electric plant efficiency and n is the steam generator efficiency; the heat added per unit total energy output is given by? |
| A. | (1 / m) + ((1 – e) / n) |
| B. | (1 / n) + ((1 – e) / m) |
| C. | (1 / m) + ((1 + e) / n) |
| D. | (1 / n) + ((1 – e) / m) |
| Answer» B. (1 / n) + ((1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® e) / m) | |
| 9. |
Back pressure turbine is placed between? |
| A. | Turbine & Pump |
| B. | Boiler & Pump |
| C. | Turbine & Heat Exchanger |
| D. | Boiler & Turbine |
| Answer» E. | |
| 10. |
Which of these is not an application of back pressure turbine? |
| A. | desalination of sea water |
| B. | filtration of water |
| C. | process industries |
| D. | petrochemical installations |
| Answer» C. process industries | |
| 11. |
In terms of cost per MW compared to condensing sets of the same power, the back pressure turbines are? |
| A. | more expensive |
| B. | cheaper |
| C. | costly |
| D. | none of the mentioned |
| Answer» C. costly | |
| 12. |
Back pressure turbines are usually _________________ with respect to their power output. |
| A. | large |
| B. | small |
| C. | very large |
| D. | very small |
| Answer» C. very large | |
| 13. |
In a by-product power cycle? |
| A. | the power is produced initially |
| B. | power production is in the middle stages of the cycle |
| C. | power production is after the cycle has ended |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 14. |
In a back pressure turbine? |
| A. | pressure at the exhaust from the turbine is the saturation pressure corresponding to the temperature desired in the process |
| B. | pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process |
| C. | pressure at the exhaust from the turbine is the saturation pressure corresponding to the pressure desired in the process |
| D. | none of the mentioned |
| Answer» B. pressure at the entrance of the turbine is the saturation pressure corresponding to the temperature desired in the process | |
| 15. |
A plant producing both, electrical power & process heat simultaneously is? |
| A. | Cogenital plant |
| B. | Cogenerial plant |
| C. | Cogeneration plant |
| D. | Conglomerate plant |
| Answer» D. Conglomerate plant | |
| 16. |
Having two separate units for process heat and power is? |
| A. | useful |
| B. | useless |
| C. | pollution reducing |
| D. | none of the mentioned |
| Answer» C. pollution reducing | |