Question 111Steam Plants - QMED
70% to passWhich of the following modes of heat transfer does NOT require any physical contact between a warmer and a cooler substance?
ALamination
BRadiation
CConduction
DAll of the above
AI Explanation
The correct answer is B) Radiation. Radiation is the only mode of heat transfer that does not require physical contact between a warmer and a cooler substance. Heat is transferred through the emission and absorption of electromagnetic waves, without the need for a physical medium. In contrast, conduction requires direct contact between the substances, and lamination is not a mode of heat transfer. All the other options (A, C, and D) are incorrect because they either do not accurately describe a mode of heat transfer or fail to capture the unique characteristic of radiation that distinguishes it from the other heat transfer mechanisms.
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