Heat Transfer
LMTD for counterflow and prallel flow heat exchanger will be the same, when the

Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid
Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)
None of these
Outlent temperature of both the hot and cold fluid are same

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Heat Transfer
Steam trap is used to

None of these
Stop the supply of steam
Remove water resulting from partial condensation of steam
Condense the steam flowing in the pipeline

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Heat Transfer
In a shell and tube heat exchanger,

The temperature drops in the two fluids and the wall are proportional to individual resistances
There is no relationship between temperature drop and resistance
The temperature drop is inversely proportional to the resistance across which the drop occurs
The relationship is not generalised

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