MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In turbine plants, Otto cycle is more suitable than Brayton cycle. |
| A. | true |
| B. | false |
| Answer» C. | |
| 2. |
Why is Otto cycle more suitable in reciprocating engine field? |
| A. | reciprocating engine field cannot handle large volume of low pressure gas |
| B. | the engine size increases |
| C. | the friction losses become more |
| D. | all of the mentioned |
| Answer» E. | |
| 3. |
For the same compression ratio and work capacity, Brayton cycle handles ____ range of volume and ____ range of pressure and temperature than does Otto cycle. |
| A. | larger, smaller |
| B. | smaller, larger |
| C. | both are same |
| D. | none of the mentioned |
| Answer» B. smaller, larger | |
| 4. |
Which of the following is more popular for electricity generation? |
| A. | gas turbine |
| B. | steam power plant |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» C. both of the mentioned | |
| 5. |
A steam power plant works on ____ and a gas turbine works on ____ |
| A. | both work on Rankine cycle |
| B. | both work on Brayton cycle |
| C. | Brayton cycle, Rankine cycle |
| D. | Rankine cycle, Brayton cycle |
| Answer» E. | |
| 6. |
For Brayton cycle, average specific volume of air that compressor handles is ____ the same of gas in a gas turbine. |
| A. | equal to |
| B. | more than |
| C. | less than |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
In Rankine cycle, working fluid ____ , in Brayton cycle working fluid ____ |
| A. | undergoes phase change, remains in gaseous phase |
| B. | remains in gaseous phase, undergoes phase change |
| C. | undergoes phase change, undergoes phase change |
| D. | remains in gaseous phase, remains in gaseous phase |
| Answer» B. remains in gaseous phase, undergoes phase change | |
| 8. |
Both Rankine cycle and Brayton cycle consists of two reversible isochores and two reversible adiabatics. |
| A. | true |
| B. | false |
| Answer» C. | |
| 9. |
For the same compression ratio, the efficiency of Brayton cycle is ____ the efficiency of Otto cycle. |
| A. | less than |
| B. | equal to |
| C. | greater than |
| D. | none of the mentioned |
| Answer» C. greater than | |
| 10. |
The efficiency of Brayton cycle depends on |
| A. | compression ratio |
| B. | pressure ratio |
| C. | either compression ratio or pressure ratio |
| D. | both compression ratio and pressure ratio |
| Answer» D. both compression ratio and pressure ratio | |
| 11. |
The efficiency of Brayton cycle is given by (rk is the compression ratio) |
| A. | 1/(rk)^(ɣ-1) |
| B. | 1 – 1/(rk)^(ɣ) |
| C. | 1 – 1/(rk)^(ɣ-1) |
| D. | 1/(rk)^(ɣ) |
| Answer» D. 1/(rk)^(ɣ) | |
| 12. |
Which of the following is true for the Brayton cycle? |
| A. | first sir is compressed reversibly and adiabatically |
| B. | heat is added reversibly at constant pressure |
| C. | air expands in turbine reversibly and adiabatically |
| D. | all of the mentioned |
| Answer» E. | |
| 13. |
The Brayton cycle consists of |
| A. | two reversible isotherms and two reversible isobars |
| B. | two reversible isochores and two reversible adiabatics |
| C. | two reversible isotherms and two reversible isochores |
| D. | two reversible isobars and two reversible adiabatics |
| Answer» E. | |
| 14. |
A gas turbine power plant uses |
| A. | Otto cycle |
| B. | Rankine cycle |
| C. | Brayton cycle |
| D. | Diesel cycle |
| Answer» D. Diesel cycle | |