MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
________ is widely used in large industrial plants such as cold storages and ice plants as per the cost basis. |
| A. | R 40 |
| B. | R 717 |
| C. | R 744 |
| D. | R 764 |
| Answer» C. R 744 | |
| 2. |
Which of the following has the highest relative dielectric strength? |
| A. | R 22 |
| B. | R 40 |
| C. | R 12 |
| D. | R 30 |
| Answer» D. R 30 | |
| 3. |
Which of the following has the highest thermal conductivity at a liquid temperature of 20 C? |
| A. | R 40 |
| B. | R 717 |
| C. | R 744 |
| D. | R 764 |
| Answer» C. R 744 | |
| 4. |
Which of the following has the highest thermal conductivity at the vapour temperature of 0 C? |
| A. | R 40 |
| B. | R 717 |
| C. | R 744 |
| D. | R 764 |
| Answer» C. R 744 | |
| 5. |
Which of the following has the highest thermal conductivity at the vapour temperature of 30 C? |
| A. | R 22 |
| B. | R 113 |
| C. | R 12 |
| D. | R 11 |
| Answer» B. R 113 | |
| 6. |
Ammonia is used only with iron or steel material equipment. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
Which of the following has the highest thermal conductivity at a liquid temperature of 40 C? |
| A. | R 22 |
| B. | R 113 |
| C. | R 12 |
| D. | R 11 |
| Answer» E. | |
| 8. |
What is the criterion to find out leakage of ammonia? |
| A. | Solubility |
| B. | Corrosiveness |
| C. | Colour |
| D. | Odour |
| Answer» E. | |
| 9. |
Which of the following has the least viscosity at a vapour temperature of -15 C and atmospheric pressure? |
| A. | R 764 |
| B. | R 744 |
| C. | R 12 |
| D. | R 11 |
| Answer» E. | |
| 10. |
Which of the following has the least viscosity at a liquid temperature of -15 C and atmospheric pressure? |
| A. | R 764 |
| B. | R 744 |
| C. | R 717 |
| D. | R 11 |
| Answer» D. R 11 | |
| 11. |
Which of the following is true about refrigerants? |
| A. | Should be corrosive |
| B. | Should not be stable |
| C. | Should have high viscosity |
| D. | Should have low viscosity |
| Answer» E. | |
| 12. |
A refrigerant should show stability and inertness. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
What is the temperature till which Freon group refrigerants remain stable? |
| A. | 545 C |
| B. | 535 C |
| C. | 555 C |
| D. | 565 C |
| Answer» C. 555 C | |