MCQOPTIONS
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MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The total radiant energy A impinging upon a body would be partially or totally absorbed, reflected from its surface or transmitted through it. Identify the correct statement |
| A. | B is the energy that is absorbed by the body |
| B. | B is the energy that is reflected by the body |
| C. | C is the energy that is absorbed by the body |
| D. | D is the energy that is transmitted by the body |
| Answer» C. C is the energy that is absorbed by the body | |
| 2. |
Radiant energy with an intensity of 800 W/m2 strikes a flat plate normally. The absorptivity is thrice the reflectivity and twice the transmissivity. Determine the rate of reflection |
| A. | 518.20 W/m2 |
| B. | 418.20 W/m2 |
| C. | 318.20 W/m2 |
| D. | 218.20 W/m2 |
| Answer» E. | |
| 3. |
A thin metal plate of 4 cm diameter is suspended in atmospheric air whose temperature is 290 K. This plate attains a temperature of 295 K when one of its face receives radiant energy from a heat source at the rate of 2 W. If heat transfer coefficient on both surfaces of the plate is stated to be 87.5 W/m 2 K, workout the energy lost by reflection |
| A. | 0.8 W |
| B. | 0.3 W |
| C. | 0.9 W |
| D. | 0.10 W |
| Answer» D. 0.10 W | |