Heat Transfer In a cooling tower, water becomes cool by Heat transfer to surroundings Loosing latent heat Loosing sensible heat Vaporisation due to heat loss to air Heat transfer to surroundings Loosing latent heat Loosing sensible heat Vaporisation due to heat loss to air ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Water Transformer oil Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Water Transformer oil Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl and Reynold's analogies are identical for Prandtl number value of 5 0.5 1 5 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to 120°C, using immersed coils carrying condensing steam at 150°C. The area of the steam coils is 1.2 m² and the overall heat transfer co-efficient to the liquid is 1500 W/m².°C. Assuming negligible heat loss to the surrounding and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for the liquid to reach desired temperature will be 15 min 22 min 44 min 51 min 15 min 22 min 44 min 51 min ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiant energy received by a body is proportional to (where, d = the distance between the object emitting radiation and that receiving it.) √d d2 d1.5 d √d d2 d1.5 d ANSWER DOWNLOAD EXAMIANS APP
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