Heat Transfer
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Less than 45°C
More than 45°C
Equal to 45°C
Initially decreases and remains constant thereafter

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
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

Equal to that of the uninsulated steam pipe
Less than that of the uninsulated steam pipe
Greater than that for uninsulated steam pipe
Less than the steam pipe with 5 cms insulation

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Heat Transfer