Chemical Engineering Basics Oxyacetylene reducing flame is used while carrying out welding on Mild steel Grey cast iron Alloy steel High carbon steel Mild steel Grey cast iron Alloy steel High carbon steel 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 ? Scale formation rate on economiser tubes increases Economiser tube life increases due to handling of low temperature water 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 Scale formation rate on economiser tubes increases Economiser tube life increases due to handling of low temperature water 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 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Compression ratio of an I.C. engine is the ratio of the Volume of air in cylinder before compression to that after compression None of these Pressure after compression to that before compression Clearance volume to the volume swept by piston per stroke Volume of air in cylinder before compression to that after compression None of these Pressure after compression to that before compression Clearance volume to the volume swept by piston per stroke ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics In radiative heat transfer, a grey surface is the one, which has Emissivity independent of wavelength Grey appearance to the eye Equal brightness in all directions Zero reflectivity Emissivity independent of wavelength Grey appearance to the eye Equal brightness in all directions Zero reflectivity ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is 2CaO . SiO₂ 3CaO . Al2O₃ 5CaO . 3 Al2O₃ 3CaO . SiO₂ 2CaO . SiO₂ 3CaO . Al2O₃ 5CaO . 3 Al2O₃ 3CaO . SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Surface tension is due to the __________ forces. Difference between adhesive & cohesive Cohesive Viscous Adhesive Difference between adhesive & cohesive Cohesive Viscous Adhesive ANSWER DOWNLOAD EXAMIANS APP
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