Heat Transfer Dropwise condensation of steam on cooling surface is promoted When both the steam and the tube are clean An oily surface None of these Only in presence of air When both the steam and the tube are clean An oily surface None of these Only in presence of air ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Multipass heat exchangers are used For low heat load To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication To reduce the pressure drop For low heat load To obtain higher heat transfer co-efficient and shorter tube Because of simplicity of fabrication To reduce the pressure drop ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchanger tubes are never made of Plain carbon steel Copper Lead Stainless steel Plain carbon steel Copper Lead Stainless steel ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface? Liquid viscosity Interfacial tension Hot surface temperature Liquid density Liquid viscosity Interfacial tension Hot surface temperature Liquid density ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Value of Prandtl number for water ranges from 100 to 500 L to 2 5 to 10 1000 to 2000 100 to 500 L to 2 5 to 10 1000 to 2000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body) αT Independent of T α 1/T α T⁴ αT Independent of T α 1/T α T⁴ ANSWER DOWNLOAD EXAMIANS APP
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