MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The heating of feedwater by steam bled from the turbine, carnotizes the Rankine cycle. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 2. |
The efficiency of regenerative cycle will be ____ the efficiency of the Rankine cycle. |
| A. | greater than |
| B. | equal to |
| C. | less than |
| D. | none of the mentioned |
| Answer» B. equal to | |
| 3. |
THE_HEATING_OF_FEEDWATER_BY_STEAM_BLED_FROM_THE_TURBINE,_CARNOTIZES_THE_RANKINE_CYCLE.?$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
Which of the following is an assumption for heaters? |
| A. | they are adequately insulated |
| B. | there is no heat gain from or heat loss to the surroundings |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
The efficiency of regenerative cycle will be ____ the efficiency of the Rankine cycle? |
| A. | greater than |
| B. | equal to |
| C. | less than |
| D. | none of the mentioned |
| Answer» B. equal to | |
| 6. |
For a regenerative cycle, which of the following is true? |
| A. | efficiency = (Q1-Q2)/Q1 |
| B. | efficiency = (Wt-Wp)/Q1 |
| C. | steam rate = 3600/(Wt-Wp) |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
The ideal regenerative cycle is not practicable because |
| A. | reversible heat transfer can’t be obtained in finite time |
| B. | heat exchanger in turbine is mechanically impracticable |
| C. | there is high moisture content of steam in the turbine |
| D. | all of the mentioned |
| Answer» E. | |
| 8. |
When compared with the Rankine cycle, the ideal regenerative cycle has |
| A. | less net work output |
| B. | more steam rate |
| C. | more efficient |
| D. | all of the mentioned |
| Answer» E. | |
| 9. |
The efficiency of an ideal regenerative cycle is ____ the Carnot cycle efficiency. |
| A. | greater than |
| B. | equal to |
| C. | less than |
| D. | none of the mentioned |
| Answer» C. less than | |
| 10. |
The efficiency of an ideal regenerative cycle is given by |
| A. | 1 – (T1/T2) |
| B. | 1 – (T2/T1) |
| C. | 1 – (Q1/Q2) |
| D. | none of the mentioned |
| Answer» C. 1 ‚Äö√Ñ√∂‚àö√ë‚àö¬® (Q1/Q2) | |
| 11. |
In the ideal regenerative cycle, the condensate after leaving the pump circulates around the turbine casing. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 12. |
The mean temperature of heat addition can be increased by |
| A. | increasing the amount of heat supplied at high temperatures |
| B. | decreasing the amount of heat added at low temperatures |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |