MCQOPTIONS
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MCQOPTIONS
This section includes 3 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. |
Hot coffee in a cup is allowed to cool. Its cooling rate is measured and found to be greater than the value calculated by conduction, convection and radiation measurement. The difference is due to: |
| A. | Properties of coffee changing with temperature |
| B. | Currents of air flow in the room |
| C. | Underestimation of the emissivity of coffee |
| D. | Evaporation |
| Answer» E. | |
| 2. |
Which of the following parameter is not responsible for loss of heat from a hot surface in room? |
| A. | Temperature of the surface |
| B. | Emissivity of the surface |
| C. | Temperature of the air in the room |
| D. | Dimensions of the room |
| Answer» E. | |
| 3. |
If a body is at 2000K, the wavelength at which the body emits maximum amount of radiation is __________ |
| A. | 1.45 m |
| B. | 1.45cm |
| C. | 0.345cm |
| D. | 0.345 m |
| Answer» B. 1.45cm | |