MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Thermal Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the saturation temperature at the partial pressure of water vapor in the air water vapor mixture called? |
| A. | Dry bulb temperature |
| B. | Wet bulb temperature |
| C. | Dew point temperature |
| D. | Saturation temperature |
| Answer» D. Saturation temperature | |
| 2. |
The latent heat load in an auditorium is 25% of sensible heat load. What is the value of sensible heat fact? |
| A. | 0.3 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 1.0 |
| Answer» D. 1.0 | |
| 3. |
What is the relative humidity when the wet bulb depression is zero? |
| A. | 100% |
| B. | 60% |
| C. | 40% |
| D. | Zero |
| Answer» B. 60% | |
| 4. |
Which one of the following is correct according to temperature? |
| A. | Effective temperature is the index which correlates the combined effects of air dry bulb temperature, air humidity and air movement upon human comfort |
| B. | The value of effective temperature in winter and summer should be same for human comfort |
| C. | Effective temperature and wet bulb temperature are same |
| D. | The valve of the effective temperature should be higher in winter than in summer for comfort |
| Answer» B. The value of effective temperature in winter and summer should be same for human comfort | |
| 5. |
Air at 35 and 25 degree Celsius dew point temperature passes through the water shower whose temperature is maintained at 20 degree Celsius. What is the process involved? |
| A. | Cooling and humidification |
| B. | Sensible cooling |
| C. | Cooling and dehumidification |
| D. | Heating and humidification |
| Answer» D. Heating and humidification | |
| 6. |
What happens when warm saturated air is cooled? |
| A. | Excess moisture condenses |
| B. | Excess moisture condenses but relative humidity remains unchanged |
| C. | Excess moisture condenses and specific humidity increases but relative humidity remains unchanged |
| D. | Specific humidity increases and relative humidity increases |
| Answer» C. Excess moisture condenses and specific humidity increases but relative humidity remains unchanged | |
| 7. |
The performance of an evaporation condenser largely depends on ________ |
| A. | Dry bulb temperature of air |
| B. | Wet bulb temperature of air |
| C. | Hot water temperature |
| D. | Air conditional room temperature |
| Answer» B. Wet bulb temperature of air | |
| 8. |
During adiabatic saturation process of air, wet bulb temperature ___________ |
| A. | Increases and dry bulb temperature remains constant |
| B. | Remains constant and dry bulb temperature increases |
| C. | Remains constant and dry bulb temperature decreases |
| D. | Decreases and dry bulb temperature remains constant |
| Answer» D. Decreases and dry bulb temperature remains constant | |
| 9. |
When a stream of moist air is passed over a cold and dry cooling coil such that no condensation takes place, then the air stream will get along the line of __________ |
| A. | Constant wet bulb temperature |
| B. | Constant dew point temperature |
| C. | Constant relative humidity |
| D. | Constant enthalpy |
| Answer» C. Constant relative humidity | |
| 10. |
What is the minimum temperature to which water can be cooled in a cooling tower? |
| A. | The dew point temperature of air |
| B. | The dew bulb temperature of air |
| C. | They dry bulb temperature of air |
| D. | The ambient air temperature |
| Answer» C. They dry bulb temperature of air | |
| 11. |
Wet bulb depression, under saturated ambient air conditions _____________ |
| A. | Is always positive |
| B. | Is always negative |
| C. | Is always zero |
| D. | May have value depending upon the dew point temperature |
| Answer» D. May have value depending upon the dew point temperature | |