Heat Transfer
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

63.8
77.2
48.7
71.2

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Heat Transfer
Steam trap is used to

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

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Heat Transfer
Which of the following situations can be approximated to a steady state heat transfer system?

A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C
Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C
A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C
10 kg of dry saturated steam at 8 kgf/cm² flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

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