MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
Fog can be cleared by cooling. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
Even a lesser quantity of steam may result in the formation of fog. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
What is the value of final enthalpy if the enthalpies before mixing were 50 and 28 kJ / kg of dry air respectively and m2 / m1 = 2? |
| A. | 38.67 |
| B. | 48.67 |
| C. | 40.05 |
| D. | 52 |
| Answer» B. 48.67 | |
| 4. |
What is the value of one of the mass before mixing if the other mass is 1.98 kg, and the final is 4.22 kg? |
| A. | 2.24 |
| B. | 1.98 |
| C. | 4.22 |
| D. | 6.20 |
| Answer» B. 1.98 | |
| 5. |
What is the value of m1 / m2 if W1 = 0.0157 kg/ kg of dry air, W2 = 0.0084 kg / kg of dry air and W3 = 0.0103 kJ/ kg of dry air? |
| A. | 0.31 |
| B. | 0.28 |
| C. | 0.35 |
| D. | 0.52 |
| Answer» D. 0.52 | |
| 6. |
What is the value of m1 / m2 if h1 = 81 kJ/ kg of dry air, h2 = 46 kJ/ kg of dry air and h3 = 58 kJ/ kg of dry air? |
| A. | 1 |
| B. | 0 |
| C. | 0.51 |
| D. | 0.52 |
| Answer» E. | |
| 7. |
When the adiabatic mixing is carried out, the air having ______ enthalpies and ____________ specific humidities are mixed. |
| A. | similar, similar |
| B. | different, similar |
| C. | similar, different |
| D. | different, different |
| Answer» E. | |
| 8. |
Which of the following is true for the adiabatic mixing of two streams? |
| A. | m3 = m3 – m1 |
| B. | m2 = m1 + m3 |
| C. | m1 = m3 + m2 |
| D. | m3 = m1 – m2 |
| Answer» B. m2 = m1 + m3 | |
| 9. |
What is the formula for m1 / m2 in terms of specific humidity for adiabatic mixing of two streams? |
| A. | W2 – W1 / W1 – W3 |
| B. | W3 – W1 / W1 – W3 |
| C. | W3 – W2 / W1 – W3 |
| D. | W3 – W2 / W2 – W3 |
| Answer» D. W3 – W2 / W2 – W3 | |
| 10. |
What is the formula for m1 / m2 in terms of enthalpies for adiabatic mixing of two streams? |
| A. | h1 – h2 / h1 – h3 |
| B. | h3 – h2 / h1 – h3 |
| C. | h3 – h2 / h2 – h3 |
| D. | h3 – h2 / h1 – h2 |
| Answer» C. h3 – h2 / h2 – h3 | |