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

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
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
A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmosheric air at 35°C
Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

Surrounding temperature
Constant temperature equal to that of the base
Average temperature of the fin
Temperature of the fin end

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Heat Transfer