MCQOPTIONS
Saved Bookmarks
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. |
The required input to the steam jet refrigeration systems is in the form of? |
| A. | Mechanical energy |
| B. | Thermal energy |
| C. | High pressure, motive steam |
| D. | Both mechanical and thermal |
| Answer» D. Both mechanical and thermal | |
| 2. |
Why low temperature refrigeration is produced in an air standard refrigeration system? |
| A. | Evaporation of liquid air |
| B. | Throttling of air |
| C. | Expansion of air in turbine |
| D. | Condensing of air |
| Answer» D. Condensing of air | |
| 3. |
In a triple fluid vapour absorption refrigeration system, why is the hydrogen gas used? |
| A. | Improve system performance |
| B. | Reduce the partial pressure of vapour in the evaporator |
| C. | Calculate the refrigerant |
| D. | Provide the vapour seal |
| Answer» C. Calculate the refrigerant | |
| 4. |
Why are vapour absorption system better than compression system? |
| A. | Uses low grade thermal energy |
| B. | Uses no energy |
| C. | Uses refined petroleum energy to produce least pollution |
| D. | Uses high grade thermal energy |
| Answer» B. Uses no energy | |
| 5. |
In a domestic icebox type refrigerator, the ice block is kept at the top because __________ |
| A. | it is easy for the user to operate |
| B. | disposal of water is easier |
| C. | hot air can be easily removed from the top |
| D. | cold air can flow down due to buoyancy effect |
| Answer» E. | |
| 6. |
What is the main function of an expansion valve? |
| A. | Reduce the refrigerant pressure |
| B. | Maintain high and low side pressures |
| C. | Protect evaporator |
| D. | Control the velocity of flow of refrigerants |
| Answer» C. Protect evaporator | |
| 7. |
Compared to natural refrigeration methods, artificial refrigeration methods are________ |
| A. | dis-continuous |
| B. | not reliable |
| C. | continuous |
| D. | environment friendly |
| Answer» D. environment friendly | |
| 8. |
For what condition, evaporative cooling system is ideal? |
| A. | Hot and Dry |
| B. | Hot and Humid |
| C. | Cold and Humid |
| D. | Moderate Hot but Humid |
| Answer» B. Hot and Humid | |
| 9. |
What is the main disadvantage of natural refrigeration methods? |
| A. | They are expensive |
| B. | They are poisonous |
| C. | They are not environment friendly |
| D. | They are dependent on local conditions |
| Answer» E. | |
| 10. |
Which of the following can be called as a refrigeration process? |
| A. | Cooling of hot ingot from 1000 C to room temperature |
| B. | Cooling of a pot of water by mixing it with a large block of ice |
| C. | Cooling in rooms using a ceiling fan |
| D. | Cooling of hot water by mixing it with tap water |
| Answer» C. Cooling in rooms using a ceiling fan | |