MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is Intermediate temperature? |
| A. | Temperature overlap is zero |
| B. | Temperature overlap is infinity |
| C. | The temperature of the low-temperature cascade system |
| D. | The temperature of the high-temperature cascade system |
| Answer» B. Temperature overlap is infinity | |
| 2. |
The difference between low-temperature cascade condenser temperature and high-temperature cascade evaporator temperature is called temperature ______ |
| A. | subtraction |
| B. | overview |
| C. | overlap |
| D. | gradient |
| Answer» D. gradient | |
| 3. |
Which intermediate refrigerants were used for the first time in the cascade system? |
| A. | CO<sub>2</sub> and CO |
| B. | CO and SO<sub>2</sub> |
| C. | NH<sub>3</sub> and CO<sub>2</sub> |
| D. | CO<sub>2</sub> and SO<sub>2</sub> |
| Answer» E. | |
| 4. |
What does low boiling refrigerants ensure? |
| A. | Lower C.O.P. |
| B. | Higher C.O.P. |
| C. | Lower pressure |
| D. | Larger compressor displacement |
| Answer» C. Lower pressure | |
| 5. |
Low-temperature cascade system use refrigerants with ______ boiling temperature and high temperature cascade system use refrigerants with _________ boiling temperature. |
| A. | low, high |
| B. | high, low |
| C. | low, low |
| D. | high, high |
| Answer» B. high, low | |
| 6. |
How is a cascade system structured? |
| A. | VCR system in parallel combination |
| B. | VCR system is not used |
| C. | VCR system in a series combination |
| D. | VAR system is used |
| Answer» D. VAR system is used | |
| 7. |
What is the principal advantage of the cascade system? |
| A. | Increase of work done |
| B. | Decrease the refrigeration effect |
| C. | Use of only one refrigerant |
| D. | Use of multiple refrigerants |
| Answer» E. | |
| 8. |
What is Cryogenics? |
| A. | C.O.P. reduction |
| B. | Low-temperature refrigeration |
| C. | Work enhancement |
| D. | High-temperature refrigeration |
| Answer» C. Work enhancement | |
| 9. |
Why is the cascade system used? |
| A. | To attain low C.O.P. |
| B. | To decrease the refrigeration effect |
| C. | To produce low temperatures |
| D. | To increase leakage loss |
| Answer» D. To increase leakage loss | |