Harmonic mean temperature difference is given by – McqOptions

MCQOPTIONS

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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