MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
A Sterling engine uses an energy source whose temperature is 727 C and an energy sink whose temperature is 27 C. How much heat must be added to the engine to produce 1 unit of work? |
| A. | 1.10 |
| B. | 1.19 |
| C. | 1.43 |
| D. | 2.0 |
| Answer» D. 2.0 | |
| 2. |
The compression ratio is the ratio of ____________ |
| A. | Swept volume to total volume |
| B. | Total volume to swept volume |
| C. | Total volume to clearance volume |
| D. | None of the mentioned |
| Answer» B. Total volume to swept volume | |
| 3. |
A simple Brayton cycle has a pressure ratio of 5 and a maximum temperature of 900 K. Air enters the compressor at 100 kPa, 300 K. Based upon cold-air standard analysis assumptions, the back-work ratio of this cycle is? |
| A. | 0.23 |
| B. | 0.53 |
| C. | 0.48 |
| D. | 0.36 |
| Answer» C. 0.48 | |
| 4. |
A simple Brayton cycle uses Helium as the working fluid, has a maximum temperature of 1000 K, and a pressure ratio of 4. At the start of the compression, the Helium pressure and temperature are 50 kPa and 250 K. Based upon cold-air standard analysis assumptions, the thermal efficiency of the cycle is? |
| A. | 0.13 |
| B. | 0.23 |
| C. | 0.43 |
| D. | 0.53 |
| Answer» E. | |
| 5. |
What is the range of Thermal efficiency in the Brayton cycle? |
| A. | 30-35% |
| B. | 40-45% |
| C. | 50-55% |
| D. | 50-60% |
| Answer» D. 50-60% | |
| 6. |
A gas turbine works on __________ |
| A. | Carnot cycle |
| B. | Brayton cycle |
| C. | Dual cycle |
| D. | Rankine cycle |
| Answer» C. Dual cycle | |