121.
Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

129.
What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?

130.
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as