Process Equipment and Plant Design
Ratio of tube length to shell diameter for a shell and tube heat exchanger is

Both B & C
< 4 : 1 for gas-gas exchangers
8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
4 : 1 to 8 : 1 for liquid-liquid exchanger

ANSWER DOWNLOAD EXAMIANS APP

Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Geometric mean of the true temperature difference and the LMTD
Differenced of true temperature difference and the LMTD
Ratio of true temperature difference to the LMTD
Ratio of LMTD to the true temperature difference

ANSWER DOWNLOAD EXAMIANS APP