The volume of fuel being returned to the tank is being discussed. Technician A says that it is normal for a small amount of fuel to be returned to the tank by the high-pressure pump and the injectors. Technician B says that any fuel being returned to the tank by the high-pressure pump or the injectors is an indication of a problem. Which technician is correct

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk