MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The energy radiated out decreases with increases in and becomes zero at an angle of |
| A. | 45 |
| B. | 30 |
| C. | 0 |
| D. | 90 |
| Answer» E. | |
| 2. |
A black body of 0.2 m2 area has an effective temperature of 800 K. Calculate the intensity of normal radiations |
| A. | 1234.65 W/m<sup>2</sup> sr |
| B. | 7396.28 W/m<sup>2</sup> sr |
| C. | 3476.74 W/m<sup>2</sup> sr |
| D. | 8739.43 W/m<sup>2</sup> sr |
| Answer» C. 3476.74 W/m<sup>2</sup> sr | |
| 3. |
The total emissive power of the emitter with area d A and temperature T is given by |
| A. | E = 2 T<sup> 4</sup> d A |
| B. | E = 3 T<sup> 4</sup> d A |
| C. | E = T<sup> 4</sup> d A |
| D. | E = T<sup> 4</sup> d A |
| Answer» D. E = T<sup> 4</sup> d A | |
| 4. |
If I n denotes the normal intensity and I represents the intensity at angle , then |
| A. | I <sub> </sub>= 2 I <sub>n</sub> cos |
| B. | I <sub> </sub>= 3 I <sub>n</sub> cos |
| C. | I <sub> </sub>= 4 I <sub>n</sub> cos |
| D. | I <sub> </sub>= I <sub>n</sub> cos |
| Answer» E. | |