Heat Transfer Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface? Interfacial tension Hot surface temperature Liquid density Liquid viscosity Interfacial tension Hot surface temperature Liquid density Liquid viscosity 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 5000 6000 4000 2000 5000 6000 4000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dietus-Boelter equation used for the determination of heat transfer co-efficient is valid for fluids in laminar flow when Grashhoff number is very important none of the listed here for fluids in tubulent flow for fluids in laminar flow when Grashhoff number is very important none of the listed here for fluids in tubulent flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place Between two bodies not in physical contact with each other Both B & C Between two bodies in physical contact with each other From one part of a body to the another part of the same body Between two bodies not in physical contact with each other Both B & C Between two bodies in physical contact with each other From one part of a body to the another part of the same body ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient Increases Decreases Is not affected May increase or decrease; depends on the feed Increases Decreases Is not affected May increase or decrease; depends on the feed ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Circulation pump is located below the evaporater to Avoid cavitation Avoid frequent priming Create more suction head None of these Avoid cavitation Avoid frequent priming Create more suction head None of these ANSWER DOWNLOAD EXAMIANS APP
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