A 10 cm dia steam pipe, carrying steam at 180°C, is ... - Solved MCQs & Answer

3633Chemical EngineeringMedium

A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2.°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be________?

ALess than that of the un-insulated steam pipe

BGreater than that for un-insulated steam pipe

CEqual to that of the un-insulated steam pipe

DLess than the steam pipe with 5 cms insulation

Correct answer

A. Less than that of the un-insulated steam pipe

Explanation

The correct answer is Less than that of the un-insulated steam pipe.

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