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 3CaO . Al2O₃ 2CaO . SiO₂ 5CaO . 3 Al2O₃ 3CaO . SiO₂ 3CaO . Al2O₃ 2CaO . SiO₂ 5CaO . 3 Al2O₃ 3CaO . SiO₂ ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Limestone addition in the blast furnace is done to flux __________ present in the raw materials. MnO₂ SiO₂ Al2O₃ P MnO₂ SiO₂ Al2O₃ P ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics 1% concentration of water vapor in air is equivalent to __________ ppm (parts per million). 10000 1000 100 10 10000 1000 100 10 ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The basic function of the drum in a boiler is to Separate steam from water Remove settling impurities from steam Act as a storage for steam Act as a storage for feed water Separate steam from water Remove settling impurities from steam Act as a storage for steam Act as a storage for feed water 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 Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water Economiser tube life increases due to handling of low temperature water Scale formation rate on economiser tubes increases Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water Economiser tube life increases due to handling of low temperature water ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Isotropic materials have the same __________ in all directions. Thermal properties Elastic properties Induced stresses Density Thermal properties Elastic properties Induced stresses Density ANSWER DOWNLOAD EXAMIANS APP
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