Heat Transfer Which of the following has the lowest Prandtl number? Water Transformer oil Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Water Transformer oil Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, square pitch compared to triangular pitch Gives a lower shell side pressure drop None of these Can pack more surface area into a shell of given diameter Gives a higher shell side pressure drop Gives a lower shell side pressure drop None of these Can pack more surface area into a shell of given diameter Gives a higher shell side pressure drop ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat waves Can be reflected by a mirror Can not pass through vacuum Travel in straight line Both B and C Can be reflected by a mirror Can not pass through vacuum Travel in straight line Both B and C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer by __________ may not necessarily require the presence of a medium radiation coduction none of the listed here natural convection radiation coduction none of the listed here natural convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In which mode of heat transfer, the Biot number is important? Radiation Natural convection Forced convection Transient heat conduction Radiation Natural convection Forced convection Transient heat conduction 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 50 32 37 45 50 32 37 45 ANSWER DOWNLOAD EXAMIANS APP
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