MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
________ refrigerants follow a formula where the molecular mass of the compound is added. |
| A. | Halocarbon |
| B. | Halo hydrogen |
| C. | Inorganic |
| D. | Azeotrope |
| Answer» D. Azeotrope | |
| 2. |
Dichloro-difluoro-methane has refrigerant number of R-12 as per designation system. |
| A. | False |
| B. | True |
| Answer» C. | |
| 3. |
Dichloro-trifluoro-ethane has a refrigerant number of R-113 as per designation system. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 4. |
__________ based refrigerant is represented by two digits, followed by R? |
| A. | Ethane |
| B. | Propane |
| C. | Ammonia |
| D. | Methane |
| Answer» E. | |
| 5. |
Which of the following is the right way to represent a refrigerant number? |
| A. | R (m – 1) (n + 1) (q) |
| B. | R (m + 1) (n + 1) (q) |
| C. | R (m – 1) (n + 1) (p) |
| D. | R (m – 1) (n + 1) (q – 1) |
| Answer» B. R (m + 1) (n + 1) (q) | |
| 6. |
What is the general chemical formula to be fulfilled by the number of atoms present in a refrigerant? |
| A. | n + p + m = 2q + 2 |
| B. | n + p + q = 2m + 2 |
| C. | n + m + q = 2p + 2 |
| D. | m + p + q = 2n + 2 |
| Answer» C. n + m + q = 2p + 2 | |
| 7. |
Which letter is assigned to the number of fluorine atoms in a refrigerant as per designation system? |
| A. | m |
| B. | n |
| C. | p |
| D. | q |
| Answer» E. | |
| 8. |
Which letter is assigned to the number of carbon atoms in a refrigerant as per designation system? |
| A. | m |
| B. | n |
| C. | p |
| D. | q |
| Answer» B. n | |
| 9. |
Which letter is assigned to the number of chlorine atoms in a refrigerant as per designation system? |
| A. | m |
| B. | n |
| C. | p |
| D. | q |
| Answer» D. q | |
| 10. |
Which letter is assigned to the number of hydrogen atoms in a refrigerant as per designation system? |
| A. | m |
| B. | n |
| C. | p |
| D. | q |
| Answer» C. p | |
| 11. |
What is the meaning of the first digit in three digits after R type of halo-carbon refrigerants? |
| A. | Number of hydrogen atoms + 2 |
| B. | Number of carbon atoms – 1 |
| C. | Number of carbon atoms + 1 |
| D. | Number of carbon atoms |
| Answer» C. Number of carbon atoms + 1 | |
| 12. |
What is the meaning of middle digit in three digits after R type of halo-carbon refrigerants? |
| A. | Number of hydrogen atoms |
| B. | Number of fluorine atoms |
| C. | Number of hydrogen atoms + 1 |
| D. | Number of carbon atoms |
| Answer» D. Number of carbon atoms | |
| 13. |
What is the meaning of the last digit in three digits after R type of halo-carbon refrigerants? |
| A. | Number of hydrogen atoms |
| B. | Number of fluorine atoms |
| C. | Number of carbon atoms |
| D. | Ethane based refrigerants |
| Answer» C. Number of carbon atoms | |
| 14. |
What is the meaning of using three digits after the R letter? |
| A. | Methane based refrigerants |
| B. | Number of molecules |
| C. | Number of refrigerants in the mixture |
| D. | Ethane based refrigerants |
| Answer» E. | |
| 15. |
What is the meaning of using two digits after the R letter? |
| A. | The base of refrigerant |
| B. | Number of molecules |
| C. | Number of refrigerants in mixture |
| D. | Number of isotopes |
| Answer» B. Number of molecules | |