For a multipass shell and tube heat exchanger, the LMTD correction factor is always________________?

A. Dowtherm
B. Mercury
C. Liquid metal (e.g. molten sodium)
D. Fused salts (e.g., an eutectic mixture of 53% KNO3, 40% NaNO2and 7% NaNO3)

A. gD3.β.Δtρ2/μ2
B. gD2βΔtρ/μ2
C. gD2βΔtP2μ
D. gD3βΔtP2/μ

A. T1 – T2
B. T1 – Ta
C. T2 – Ta
D. None of these

A. Basket type
B. Horizontal tube
C. Calandria
D. None of these

A. Geometric
B. Arithmetic
C. Logarithmic
D. Either A., B. or C.

A. Aluminium foil
B. Coal dust
C. Refractory bricks
D. Iron plates