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2516. __________ paint has the minimum absorption co-efficient.

September 7, 2025 by Admin

Black

White lead

Grey

Light cream

✅ The correct answer is option B.

Categories Chemical Engineering, Engineering, Heat Transfer MCQs Tags Chemical Engineering MCQs, Engineering MCQs, Heat Transfer MCQs

2511. A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of materialA is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C.

2521. The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are

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