| 11. | Generally heat generated depends on some parameters. It is directly proportional to |
| a. | Time |
| b. | Conductivity |
| c. | Voltage |
| d. | Distance between plates |
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Answer: (c).Voltage
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| 12. | Consider a 1.2 m thick slab of poured concrete (k = 1.148 W/m degree) with both of side surfaces maintained at a temperature of 20 degree Celsius. During its curing, chemical energy is released at the rate of 80 W/m³. Workout the maximum temperature of concrete |
| a. | 30.73 degree celsius |
| b. | 29.73 degree celsius |
| c. | 28.73 degree celsius |
| d. | 27.73 degree celsius |
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Answer: (b).29.73 degree celsius
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| 13. | The insulating material used in dielectric heating is |
| a. | Coal |
| b. | Silver |
| c. | Coin |
| d. | Wool |
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Answer: (d).Wool
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| 14. | Unit of specific resistance is |
| a. | Ohm mm²/m |
| b. | Ohm mm |
| c. | Ohm/m |
| d. | Ohm mm/m |
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Answer: (a).Ohm mm²/m
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| 15. | What maximum thickness of concrete can be poured without causing the temperature gradient to exceed 98.5 degree Celsius per meter anywhere in the slab? Consider a 1.2 m thick slab of poured concrete (k = 1.148 W/m degree) with both of side surfaces maintained at a temperature of 20 degree Celsius. During its curing, chemical energy is released at the rate of 80 W/m³. Workout the maximum temperature of concrete |
| a. | 2.64 m |
| b. | 3.64 m |
| c. | 4.64 m |
| d. | 5.64 m |
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Answer: (b).3.64 m
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