MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Power Plant Engg knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
RANKINE_CYCLE_EFFICIENCY_OF_A_GOOD_STEAM_POWER_PLANT_MAY_BE_IN_THE_RANGE_OF??$ |
| A. | 15 to 20% |
| B. | 35 to 45% |
| C. | 70 to 80% |
| D. | 90 to 95% |
| Answer» D. 90 to 95% | |
| 2. |
WHAT_IS_THE_ACTUAL_TURBINE_INLET_TEMPERATURE_IN_RANKINE_CYCLE??$ |
| A. | 700C |
| B. | 800C |
| C. | 550C |
| D. | 1150C |
| Answer» C. 550C | |
| 3. |
A simple Rankine cycle operates the Boiler at 3 MPa with an outlet temperature of 350°C and the Condenser at 50 kPa. Assuming ideal operation and processes, what is the thermal efficiency of this cycle?$# |
| A. | 7.7 |
| B. | 17.7 |
| C. | 27.7 |
| D. | 37.7 |
| Answer» C. 27.7 | |
| 4. |
Which of the following contributes to the improvement of efficiency of Rankine cycle in a Thermal Power Plant? |
| A. | reheating of steam at intermediate stage |
| B. | regeneration use of steam for heating Boiler feed water |
| C. | use of high pressures |
| D. | all of the mentioned |
| Answer» E. | |
| 5. |
In Rankine cycle, the work output from the turbine is given by |
| A. | change of internal energy between inlet and outlet |
| B. | change of enthalpy between inlet and outlet |
| C. | change of entropy between inlet and outlet |
| D. | change of temperature between inlet and outlet |
| Answer» C. change of entropy between inlet and outlet | |
| 6. |
Rankine cycle comprises of |
| A. | two isentropic processes and two constant volume processes |
| B. | two isentropic processes and two constant pressure processes |
| C. | two isothermal processes and two constant pressure processes |
| D. | none of the mentioned |
| Answer» C. two isothermal processes and two constant pressure processes | |
| 7. |
Rankine efficiency of a Steam Power Plant |
| A. | improves in Summer as compared to that in Winter |
| B. | improves in Winter as compared to that in Summer |
| C. | is unaffected by climatic conditions |
| D. | none of the mentioned |
| Answer» C. is unaffected by climatic conditions | |
| 8. |
Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2 |
| A. | has higher thermal efficiency than the Carnot cycle operating between same pressure limits |
| B. | has lower thermal efficiency than Carnot cycle operating between same pressure limits |
| C. | has same thermal efficiency as Carnot cycle operating between same pressure limits |
| D. | may be more or less depending upon the magnitudes of p1 and p2 |
| Answer» B. has lower thermal efficiency than Carnot cycle operating between same pressure limits | |
| 9. |
What is the unit of Heat rate? |
| A. | kJ/KW |
| B. | KW/kJ |
| C. | kJ |
| D. | KW |
| Answer» B. KW/kJ | |