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 Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the wavelength of monochromatic radiation temperature of the body only none of the listed here nature of material of body wavelength of monochromatic radiation temperature of the body only none of the listed here nature of material of body ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 0 and 1 0 and 0.5 1 and 0 1 and ? 0 and 1 0 and 0.5 1 and 0 1 and ? ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Reason for operating an evaporator in multiple effect is to secure Increased steam economy Decreased steam consumption Both A and B Increased capacity Increased steam economy Decreased steam consumption Both A and B Increased capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is Dependent on NRe only 1.66 3.66 88.66 Dependent on NRe only 1.66 3.66 88.66 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The actual temperature drop across the heating surface in an evaporator depends on the Pressure difference between steam chest and vapour space Depth of liquid over heating surface All of these Feed Pressure difference between steam chest and vapour space Depth of liquid over heating surface All of these Feed ANSWER DOWNLOAD EXAMIANS APP
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