MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If a condenser and evaporator temperatures are X K and 100 K respectively, and reverse Carnot C.O.P is 2.5 then find out the X . |
| A. | 100 K |
| B. | 150 K |
| C. | 350 K |
| D. | 200 K |
| Answer» D. 200 K | |
| 2. |
The C.O.P of a reverse Carnot cycle doesn t depend on which of the following? |
| A. | Moisture |
| B. | Evaporator temperature |
| C. | Condenser temperature |
| D. | Work done |
| Answer» B. Evaporator temperature | |
| 3. |
The C.O.P for reverse Carnot refrigerator is 2. The ratio of highest temperature to lowest temperature will be _____ |
| A. | 4 times |
| B. | 3 times |
| C. | 1/2 times |
| D. | 1/3 times |
| Answer» E. | |
| 4. |
In general the ratio of lowest to highest temperature with respect to C.O.P. can be denoted by _________ |
| A. | C.O.P + 1 = Ratio of temperature |
| B. | C.O.P/2 = Ratio of temperature |
| C. | C.O.P + 4 = Ratio of temperature |
| D. | C.O.P + 2 = Ratio of temperature |
| Answer» B. C.O.P/2 = Ratio of temperature | |
| 5. |
The C.O.P for reverse Carnot refrigerator is 6. The ratio of lowest temperature to highest temperature will be _____ |
| A. | twice |
| B. | three times |
| C. | four times |
| D. | seven times |
| Answer» E. | |
| 6. |
If a condenser and evaporator temperatures are 312 K and X K respectively, and C.O.P. is given as 5 then find the value of X. |
| A. | 52 |
| B. | 65 |
| C. | 78 |
| D. | 82 |
| Answer» B. 65 | |
| 7. |
If a condenser and evaporator temperatures are 225 K and 100 K respectively, then reverse Carnot C.O.P is _________ |
| A. | 0.5 |
| B. | 1.5 |
| C. | 1.25 |
| D. | 1.75 |
| Answer» D. 1.75 | |
| 8. |
Find the Relative C.O.P. of a refrigeration system if the work input is 100 KJ/kg and refrigeration effect produced is 250 KJ/kg of refrigerant flowing. Also Theoretical C.O.P. is 3. |
| A. | 0.65 |
| B. | 0.80 |
| C. | 0.83 |
| D. | 0.91 |
| Answer» D. 0.91 | |
| 9. |
What is the C.O.P. of a refrigeration system if the work input is 40 KJ/kg and work output is 80 KJ/kg and refrigeration effect produced is 130 KJ/kg of refrigerant flowing. |
| A. | 3.00 |
| B. | 3.25 |
| C. | 2.25 |
| D. | 3.75 |
| Answer» C. 2.25 | |
| 10. |
Efficiency of the Refrigerator is _________ to the C.O.P of refrigerator. |
| A. | inversely proportional |
| B. | equal |
| C. | independent |
| D. | directly proportional |
| Answer» D. directly proportional | |