MCQOPTIONS
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MCQOPTIONS
| 1. |
Heat exchange between two gray surfaces enclosed by an adiabatic surface is given by |
| A. | Q <sub>12</sub> = A (T<sub> 1</sub><sup>4 </sup> T <sub>2</sub><sup>4</sup>) / [1/E <sub>1</sub> + 1/E<sub> 2</sub> 2 + 2/1 + F <sub>12</sub>]. |
| B. | Q <sub>12</sub> = A <sub>b</sub> (T<sub> 1</sub><sup>4 </sup> T <sub>2</sub><sup>4</sup>) / [1/E <sub>1</sub> + 1/E<sub> 2</sub> + 2/1 + F <sub>12</sub>]. |
| C. | Q <sub>12</sub> = A <sub>b</sub> (T<sub> 1</sub><sup>4 </sup> T <sub>2</sub><sup>4</sup>) / [1/E <sub>1</sub> + 1/E<sub> 2</sub> 2 + 2/1 + F <sub>12</sub>]. |
| D. | Q <sub>12</sub> = A <sub>b</sub> (T<sub> 1</sub><sup>4 </sup> T <sub>2</sub><sup>4</sup>) / [1/E <sub>1</sub> + 1/E<sub> 2</sub> 2]. |
| Answer» D. Q <sub>12</sub> = A <sub>b</sub> (T<sub> 1</sub><sup>4 </sup> T <sub>2</sub><sup>4</sup>) / [1/E <sub>1</sub> + 1/E<sub> 2</sub> 2]. | |