MCQOPTIONS
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MCQOPTIONS
This section includes 3 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. |
Time lag is given by the formula |
| A. | x/2 [1/ ( n) <sup> </sup>]. |
| B. | x/3 [1/ ( n) <sup> </sup>]. |
| C. | x/4 [1/ ( n) <sup> </sup>]. |
| D. | x/5 [1/ ( n) <sup> </sup>]. |
| Answer» B. x/3 [1/ ( n) <sup> </sup>]. | |
| 2. |
Consider he above problem, find the rate of change of temperature at the inside surface of the tube |
| A. | 35 degree Celsius/hour |
| B. | 45 degree Celsius/hour |
| C. | 55 degree Celsius/hour |
| D. | 65 degree Celsius/hour |
| Answer» D. 65 degree Celsius/hour | |
| 3. |
The temperature distribution at a certain time instant through a 50 cm thick wall is prescribed by the relationT = 300 500 x 100 x2 + 140 x3 |
| A. | nWhere temperature t is in degree Celsius and the distance x in meters has been measured from the hot surface. If thermal conductivity of the wall material is 20 k J/m hr degree, calculate the heat energy stored per unit area of the wall |
| B. | 4100 k J/hr |
| C. | 4200 k J/hr |
| D. | 4300 k J/hr |
| E. | 4400 k J/hr |
| Answer» B. 4100 k J/hr | |