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. |
R – 764, i.e., Sulphur dioxide is the least toxic refrigerant. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 2. |
Among the following refrigerants, which is the odd refrigerant as per the criterion of toxicity? |
| A. | R – 11 |
| B. | R – 12 |
| C. | R – 22 |
| D. | R – 30 |
| Answer» E. | |
| 3. |
What is right about Ammonia? |
| A. | Ammonia is insoluble in water |
| B. | Ammonia spoils the taste of fruits and vegetables when mixed with water |
| C. | Ammonia does not affect the taste of fruits and vegetables when mixed with water |
| D. | Ammonia is not toxic |
| Answer» C. Ammonia does not affect the taste of fruits and vegetables when mixed with water | |
| 4. |
Among the following refrigerants, which is having relatively higher miscibility? |
| A. | Ammonia |
| B. | R – 12 |
| C. | Carbon dioxide |
| D. | Sulphur dioxide |
| Answer» C. Carbon dioxide | |
| 5. |
What is the ability of refrigerant to mix with oil called? |
| A. | Toxicity |
| B. | Flammability |
| C. | Miscibility |
| D. | Solubility of water |
| Answer» D. Solubility of water | |
| 6. |
A wetted cloth is put at the point of the leak in ammonia refrigeration plants. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
By what ratio, R – 22 has more solubility in water than R – 12? |
| A. | 2:1 |
| B. | 4:1 |
| C. | 1:2 |
| D. | 3:1 |
| Answer» E. | |
| 8. |
In what proportion when Ammonia mixed with air becomes explosive? |
| A. | 10 – 15 % gas by volume |
| B. | 16 – 25 % gas by volume |
| C. | 10 – 15 % gas by weight |
| D. | 16 – 25 % gas by weight |
| Answer» C. 10 – 15 % gas by weight | |
| 9. |
What is right about the explosive properties of halo-carbon refrigerants? |
| A. | They are not flammable |
| B. | They possess incredibly high explosive properties |
| C. | They possess low explosive properties |
| D. | They possess low explosive properties |
| Answer» B. They possess incredibly high explosive properties | |
| 10. |
What is right about the flammability of halo-carbon refrigerants? |
| A. | They possess low flammable properties |
| B. | They possess incredibly high flammable properties |
| C. | They are not flammable |
| D. | They possess little flammable properties |
| Answer» D. They possess little flammable properties | |