MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following factor of the actual VCR affects severely the coefficient of performance? |
| A. | Increase in suction pressure |
| B. | Decrease in discharge pressure |
| C. | Decrease in suction pressure |
| D. | Increase in discharge pressure |
| Answer» D. Increase in discharge pressure | |
| 2. |
What is the effect of an increase in discharge pressure on C.O.P.? |
| A. | C.O.P. decreases |
| B. | C.O.P. increases |
| C. | C.O.P. remains the same |
| D. | C.O.P. becomes zero |
| Answer» B. C.O.P. increases | |
| 3. |
What is the effect of a decrease in suction pressure on C.O.P.? |
| A. | C.O.P. increases |
| B. | C.O.P. decreases |
| C. | C.O.P. remains the same |
| D. | C.O.P. becomes zero |
| Answer» C. C.O.P. remains the same | |
| 4. |
What does process 1-2 represent? |
| A. | Expansion |
| B. | Condensation |
| C. | Compression |
| D. | Evaporation |
| Answer» E. | |
| 5. |
What does process 11-1 represent? |
| A. | Expansion |
| B. | Condensation |
| C. | Compression |
| D. | Evaporation |
| Answer» B. Condensation | |
| 6. |
What does process 10-11 represent? |
| A. | Compression |
| B. | Expansion |
| C. | Evaporation with superheating |
| D. | Subcooling |
| Answer» E. | |
| 7. |
What does process 9-10 represent? |
| A. | Compression |
| B. | Condensation |
| C. | Evaporation |
| D. | Expansion |
| Answer» C. Evaporation | |
| 8. |
What does process 8-9 represent? |
| A. | Compression |
| B. | Condensation |
| C. | De-superheating |
| D. | Expansion with subcooling |
| Answer» D. Expansion with subcooling | |
| 9. |
What does process 7-8 represent? |
| A. | Condensation |
| B. | Compression |
| C. | Pressure reduction |
| D. | Evaporation |
| Answer» D. Evaporation | |
| 10. |
What does process 5-6 represent? |
| A. | Expansion |
| B. | Compression |
| C. | Condensation |
| D. | Evaporation |
| Answer» C. Condensation | |
| 11. |
What does process 4-5 represent? |
| A. | Temperature rise |
| B. | Temperature fall |
| C. | Compression |
| D. | Expansion |
| Answer» B. Temperature fall | |
| 12. |
Which of the following is not the difference between theoretical and actual VCR cycle? |
| A. | Pressure drops in the evaporator |
| B. | Pressure drops in the condenser |
| C. | Compression of refrigerant is never polytropic |
| D. | Compression of refrigerant is always isentropic |
| Answer» E. | |