Heat Transfer With increase in porosity, the thermal conductivity of a solid substance May increase or decrease; depends on the solid Increases Remains unchanged Decreases May increase or decrease; depends on the solid Increases Remains unchanged Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Water is normally used as a coolant in the heat exchange equipments mainly because ofits Low density Low viscosity High fluidity Abundance & high heat capacity Low density Low viscosity High fluidity Abundance & high heat capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a laboratory test run, the rate of drying was found to be 0.5 x 10-3 kg/m².s, when the moisture content reduced from 0.4 to 0.1 on dry basis. The critical moisture content of the material is 0.08 on a dry basis. A tray dryer is used to dry 100 kg (dry basis) of the same material under identical conditions. The surface area of the material is 0.04 m²/kg of dry solid. The time required (in seconds) to reduce the moisture content of the solids from 0.3 to 0.2 (dry basis) is 2000 4000 6000 5000 2000 4000 6000 5000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Hot water (0.01 m³ /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m³/min) of density 800 kg/m³ and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately 37 32 45 50 37 32 45 50 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Vent pipes are provided in a condenser to Purge the condenser Remove non-condensable gases None of these Facilitate easy cleaning of tubes Purge the condenser Remove non-condensable gases None of these Facilitate easy cleaning of tubes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping The top tube sheet floating and bottom tube sheet fixed The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating Both the tube sheets fixed The top tube sheet floating and bottom tube sheet fixed The top tube sheet fixed and the bottom tube-sheet floating Both the tube sheets floating Both the tube sheets fixed ANSWER DOWNLOAD EXAMIANS APP
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