Harmonic mean temperature difference is given by_________________? – McqOptions

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1.	Harmonic mean temperature difference is given by_________________?
A.	√(ΔT1 . ΔT2)
B.	2 (ΔT1 . ΔT2)/(ΔT1 + ΔT2)
C.	2 (ΔT1 . ΔT2)/(ΔT1 – ΔT2)
D.	(ΔT1 – ΔT2)/(ΔT1 . ΔT2)
Answer» C. 2 (ΔT1 . ΔT2)/(ΔT1 – ΔT2)

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