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_RECIPROCATING_COMPRESSORS,_ACTUAL_VOLUME_OF_GAS_DRAWN_IN_CYLINDER_IS______THE_VOLUME_DISPLACED_BY_PISTON.?$ |
| A. | less than |
| B. | more than |
| C. | equal to |
| D. | none of the mentioned |
| Answer» B. more than | |
| 2. |
Plate evaporator is a common type of evaporator.$ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 3. |
The_clearance_volumetric_efficiency_is_equal_to$ |
| A. | 1 + C + C(p2/p1)^(1/n) |
| B. | 1 – C – C(p2/p1)^(1/n) |
| C. | 1 – C + C(p2/p1)^(1/n) |
| D. | 1 + C – C(p2/p1)^(1/n) |
| Answer» E. | |
| 4. |
Why is ammonia used in food refrigeration? |
| A. | high COP |
| B. | low cost |
| C. | lower energy cost |
| D. | all of the mentioned |
| Answer» E. | |
| 5. |
The most widely used refrigerants are |
| A. | freon |
| B. | genetron |
| C. | arcton |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
The intercooler pressure is given by |
| A. | p1*p2 |
| B. | sqrt(p1*p2) |
| C. | (p1*p2)/(p1+p2) |
| D. | (p1+p2)/2 |
| Answer» C. (p1*p2)/(p1+p2) | |
| 7. |
Why is multistage compression with intercooling adopted? |
| A. | using a single stage with high pressure ratio decreases volumetric efficiency |
| B. | high pressure ratio with dry compression gives high compressor discharge temperature |
| C. | the refrigerant is damaged |
| D. | all of the mentioned |
| Answer» E. | |
| 8. |
When volume flow rate of refrigerant is large, which compressor is used? |
| A. | reciprocating |
| B. | centrifugal |
| C. | rotary |
| D. | all of the mentioned |
| Answer» C. rotary | |
| 9. |
Types of compressor include |
| A. | reciprocating |
| B. | centrifugal |
| C. | rotary |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
Capillary tubes are used in ____ |
| A. | small units |
| B. | larger units |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» B. larger units | |
| 11. |
Throttle valves are used in ____ |
| A. | small units |
| B. | larger units |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» C. both of the mentioned | |
| 12. |
Which of the following is a type of expansion device? |
| A. | capillary tubes |
| B. | throttle valves |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 13. |
For an expansion device, which of the following is true? |
| A. | it increases the pressure of refrigerant |
| B. | it regulates the flow of refrigerant to evaporator |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» C. both of the mentioned | |
| 14. |
Which of the following statement is true for a condenser? |
| A. | it can be air-cooled or water-cooled |
| B. | small self-contained units use water-cooled condenser |
| C. | large installations use air-cooled condenser |
| D. | all of the mentioned |
| Answer» B. small self-contained units use water-cooled condenser | |