Machine Design MCQ Set 1 1. What is the value of emissivity for polished aluminum? a) 0.01 b) 0.02 c) 0.03 d) 0.04 AnswerAnswer: c [Reason:] The emissivity of the surface of a material is its effectiveness in emitting energy as thermal radiation. 2. Which one is having highest emissivity? a) Tarnished copper b) Polished…
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