Relevant Competitive Tests:
Harmonic mean temperature difference is given by_________________?
A. √(ΔT1 . ΔT2)
B. 2 (ΔT1 . ΔT2)/(ΔT1 + ΔT2)Correct Answer
C. 2 (ΔT1 . ΔT2)/(ΔT1 – ΔT2)
D. (ΔT1 – ΔT2)/(ΔT1 . ΔT2)
Correct Option: B. 2 (ΔT1 . ΔT2)/(ΔT1 + ΔT2)
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