Chemical Engineering Basics In radiative heat transfer, a grey surface is the one, which has Grey appearance to the eye Emissivity independent of wavelength Zero reflectivity Equal brightness in all directions Grey appearance to the eye Emissivity independent of wavelength Zero reflectivity Equal brightness in all directions ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Cold cracking in the heat affected zone of a high strength steel weld can take place because of the Retained austenite Relatively high sulphur content in the base metal Martensite formation Sufficient hydrogen present in the welding arc Retained austenite Relatively high sulphur content in the base metal Martensite formation Sufficient hydrogen present in the welding arc ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Coke is added in the blast furnace to Remove sulphur & phosphorus from molten metal Reduce & melt the iron ore None of these Increase the fluidity of slag Remove sulphur & phosphorus from molten metal Reduce & melt the iron ore None of these Increase the fluidity of slag ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Cold chiesel & hammers are made of Mild steel Forged steel High carbon steel High speed steel Mild steel Forged steel High carbon steel High speed steel ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/seC₂ is 8.82 0.95 10.88 9.81 8.82 0.95 10.88 9.81 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ? Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases Economiser tube life increases due to handling of low temperature water Scale formation rate on economiser tubes increases It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases Economiser tube life increases due to handling of low temperature water Scale formation rate on economiser tubes increases It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS