MCQOPTIONS
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MCQOPTIONS
This section includes 31 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 number of pumps required by a closed heater for pumping the main feedwater stream is? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 2. |
Which of the following is not an advantage of an open heater? |
| A. | simplicity |
| B. | lower cost |
| C. | high heat transfer capacity |
| D. | necessity of a pump at each heater to handle the large feedwater stream |
| Answer» E. | |
| 3. |
Which of these is a disadvantage of open heater? |
| A. | simplicity |
| B. | lower cost |
| C. | high heat transfer capacity |
| D. | none of the mentioned |
| Answer» E. | |
| 4. |
When is a drain-cooler used? |
| A. | when the extracted steam upon condensation gets subcooled |
| B. | when the extracted steam upon subcooling gets condensed |
| C. | the extracted stream has no dependence on drain-cooler |
| D. | none of the mentioned |
| Answer» B. when the extracted steam upon subcooling gets condensed | |
| 5. |
If plant efficiency is high, what will be its effect on heater size? |
| A. | it remains same |
| B. | it increases |
| C. | it decreases |
| D. | none of the mentioned |
| Answer» C. it decreases | |
| 6. |
Which of these is the correct expression for terminal temperature difference(TTD)? |
| A. | TTD = saturation temperature of ‘bled’ steam – exit water temperature |
| B. | TTD = saturation temperature of ‘bled’ steam + exit water temperature |
| C. | TTD = saturation temperature of ‘bled’ steam x exit water temperature |
| D. | TTD = saturation temperature of ‘bled’ steam / exit water temperature |
| Answer» B. TTD = saturation temperature of ‘bled’ steam + exit water temperature | |
| 7. |
What is the other name of the open heater? |
| A. | shell & tube heat exchangers |
| B. | contact type heaters |
| C. | regenerative heat exchangers |
| D. | closed heaters |
| Answer» C. regenerative heat exchangers | |
| 8. |
WHICH_OF_THE_FOLLOWING_MATERIAL_CAN_BE_USED_AS_A_MODERATOR??$ |
| A. | Beryllium |
| B. | Graphite |
| C. | Heavy water |
| D. | All of the mentioned |
| Answer» E. | |
| 9. |
IF_PLANT_EFFICIENCY_IS_HIGH,_WHAT_WILL_BE_ITS_EFFECT_ON_HEATER_SIZE??$ |
| A. | it remains same |
| B. | it increases |
| C. | it decreases |
| D. | none of the mentioned |
| Answer» C. it decreases | |
| 10. |
Which of these is a disadvantage of open heater?$ |
| A. | simplicity |
| B. | lower cost |
| C. | high heat transfer capacity |
| D. | none of the mentioned |
| Answer» E. | |
| 11. |
Closed_heaters_are?$ |
| A. | horizontal |
| B. | vertical |
| C. | inclined |
| D. | depends on requirement |
| Answer» E. | |
| 12. |
When_is_a_drain-cooler_used?$ |
| A. | when the extracted steam upon condensation gets subcooled |
| B. | when the extracted steam upon subcooling gets condensed |
| C. | the extracted stream has no dependence on drain-cooler |
| D. | none of the mentioned |
| Answer» B. when the extracted steam upon subcooling gets condensed | |
| 13. |
Why are closed heaters sometimes made vertical? |
| A. | to reduce weight of heaters |
| B. | to reduce floor areas for installations |
| C. | to minimize losses due to weight |
| D. | none of the mentioned |
| Answer» C. to minimize losses due to weight | |
| 14. |
What is the purpose of using open heaters in steam power plants? |
| A. | feedwater purification |
| B. | feedwater esterification |
| C. | feedwater deaeration |
| D. | feedwater carbonisation |
| Answer» D. feedwater carbonisation | |
| 15. |
The number of pumps required by a closed heater for pumping the main feedwater stream is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 16. |
Which_of_the_following_is_not_an_advantage_of_an_open_heater? |
| A. | simplicity |
| B. | lower cost |
| C. | high heat transfer capacity |
| D. | necessity of a pump at each heater to handle the large feedwater stream |
| Answer» E. | |
| 17. |
What do you mean by heater drip? |
| A. | condensate |
| B. | heater failure |
| C. | extract |
| D. | maximum temperature |
| Answer» B. heater failure | |
| 18. |
If terminal temperature difference (TTD) is too small, what will be its impact on plant efficiency? |
| A. | it increases |
| B. | it decreases |
| C. | it remains same |
| D. | none of mentioned |
| Answer» B. it decreases | |
| 19. |
What are the advantages of open heater? |
| A. | lower cost |
| B. | high heat transfer capacity |
| C. | high feedwater temperature |
| D. | all of the mentioned |
| Answer» E. | |
| 20. |
Which of these is the correct expression for terminal temperature difference(TTD) ? |
| A. | TTD = saturation temperature of ‘bled’ steam – exit water temperature |
| B. | TTD = saturation temperature of ‘bled’ steam + exit water temperature |
| C. | TTD = saturation temperature of ‘bled’ steam x exit water temperature |
| D. | TTD = saturation temperature of ‘bled’ steam / exit water temperature |
| Answer» B. TTD = saturation temperature of ‚Äö√Ñ√∂‚àö√ë‚àö‚â§bled‚Äö√Ñ√∂‚àö√ë‚àö¬• steam + exit water temperature | |
| 21. |
Why at least one open heater is used? |
| A. | installed vertically |
| B. | feedwater deaeration |
| C. | less cost |
| D. | increase efficiency |
| Answer» C. less cost | |
| 22. |
What is the function of the trap applied to the condensate? |
| A. | the trap stops the condensate fully |
| B. | the trap stops only vapour & allows liquid to pass through it |
| C. | the trap stops only liquid & allows vapour to pass through it |
| D. | none of the mentioned |
| Answer» C. the trap stops only liquid & allows vapour to pass through it | |
| 23. |
The value of TTD varies with? |
| A. | heater pressure |
| B. | heater temperature |
| C. | turbine inlet temperature |
| D. | independent of all mentioned |
| Answer» B. heater temperature | |
| 24. |
What is the other name of the condensate obtained after condensation in a shell-and-tube heat exchanger type closed heaters? |
| A. | Heater rise |
| B. | Heater fall |
| C. | Heater drip |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 25. |
Expand TTD? |
| A. | turbine temperature difference |
| B. | total temperature difference |
| C. | terminal temperature difference |
| D. | turbine terminal difference |
| Answer» D. turbine terminal difference | |
| 26. |
Closed heaters are ______________ heat exchangers. |
| A. | parallel flow |
| B. | shell-and-tube |
| C. | counter flow |
| D. | cross- flow |
| Answer» C. counter flow | |
| 27. |
Closed heaters are also called |
| A. | contact type heater |
| B. | shell and heat exchanger |
| C. | drip heaters |
| D. | shell and tube heater |
| Answer» C. drip heaters | |
| 28. |
What is the condition of the fluids in closed heaters? |
| A. | they are separate |
| B. | they are mixed |
| C. | they are partially mixed |
| D. | none of the mentioned |
| Answer» B. they are mixed | |
| 29. |
In open feedwater heater |
| A. | the extracted steam is allowed to mix with feedwater |
| B. | feedwater flows trough tubes and steam is condensed outside |
| C. | steam flows outside tubes and feedwater inside |
| D. | steam flows inside tubes and outside inside |
| Answer» B. feedwater flows trough tubes and steam is condensed outside | |
| 30. |
What is the other name of open heater? |
| A. | shell & tube heat exchangers |
| B. | contact type heaters |
| C. | regenerative heat exchangers |
| D. | closed heaters |
| Answer» C. regenerative heat exchangers | |
| 31. |
Feed water heaters are of how many types? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |