MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Air Conditioning knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If the relative humidity is zero, then the humidity ratio is infinity. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 2. |
Which of the following is true, according to Dalton’s law of partial pressures? |
| A. | pb = pa x pv |
| B. | pb = pa – pv |
| C. | pb = pa + pv |
| D. | pa = pb + pv |
| Answer» D. pa = pb + pv | |
| 3. |
Relative humidity is represented as __________ |
| A. | mv / ma |
| B. | ma / mv |
| C. | ps / pv |
| D. | mv / ms |
| Answer» E. | |
| 4. |
What is the humidity ratio in terms of pressure? |
| A. | 0.622 pv / pb |
| B. | 0.622 pv / pa |
| C. | 0.622 mv / mb |
| D. | 0.622 mv / ma |
| Answer» C. 0.622 mv / mb | |
| 5. |
What is the humidity ratio in terms of mass? |
| A. | mv / ma |
| B. | ma / mv |
| C. | pv / pa |
| D. | pa / pv |
| Answer» B. ma / mv | |
| 6. |
If DBT = 30°C, WBT = 20°C and Barometer reading is 740 mm of Hg. Find out vapor density using steam tables. |
| A. | 0.01216 kg / m3 of dry air |
| B. | 0.01216 g / m3 of dry air |
| C. | 0.01216 m3 / m3 of dry air |
| D. | 0.01216 kg / kg of dry air |
| Answer» B. 0.01216 g / m3 of dry air | |
| 7. |
If DBT = 30°C, WBT = 20°C and Barometer reading is 740 mm of Hg. Find out degree of saturation using steam tables. |
| A. | 40 % |
| B. | 39 % |
| C. | 38 % |
| D. | 35 % |
| Answer» C. 38 % | |
| 8. |
If DBT = 30°C, WBT = 20°C and Barometer reading is 740 mm of Hg. Find out specific humidity using steam tables. |
| A. | 10.914 m3 / kg of dry air |
| B. | 10.914 |
| C. | 10.914 kg / kg of dry air |
| D. | 10.914 g / kg of dry air |
| Answer» E. | |
| 9. |
If DBT = 30°C, WBT = 20°C and Barometer reading is 740 mm of Hg. Find out relative humidity using steam tables. |
| A. | 40 % |
| B. | 50 % |
| C. | 30 % |
| D. | 20 % |
| Answer» B. 50 % | |
| 10. |
If DBT = 30°C, WBT = 20°C and Barometer reading is 740 mm of Hg. Find out DPT using steam tables. |
| A. | 5°C |
| B. | 35°C |
| C. | 15°C |
| D. | 25°C |
| Answer» C. 15°C | |
| 11. |
What is the value of pb if pa = 1.48 bar and pv = 1.52 bar, according to Dalton’s law of partial pressures? |
| A. | 1 bar |
| B. | 2 bar |
| C. | 3 bar |
| D. | 4 bar |
| Answer» D. 4 bar | |
| 12. |
What is the value of relative humidity if pv = 0.468 bar and ps = 0.893 bar? |
| A. | 52 % |
| B. | 54 % |
| C. | 56 % |
| D. | 190 % |
| Answer» B. 54 % | |
| 13. |
What is the value of relative humidity if mv = 2.901 and ms = 9.056? |
| A. | 0.3 |
| B. | 0.330 |
| C. | 0.310 |
| D. | 0.320 |
| Answer» E. | |
| 14. |
What is the value of humidity ratio if mv = 1.423 and ma = 3.589? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.4 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 15. |
What is the value of humidity ratio if pv = 0.387 bar and pa = 0.997 bar? |
| A. | 0.482 |
| B. | 0.241 |
| C. | 0.122 |
| D. | 0.622 |
| Answer» C. 0.122 | |