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 5CaO . 3 Al2O₃ 2CaO . SiO₂ 3CaO . SiO₂ 3CaO . Al2O₃ 5CaO . 3 Al2O₃ 2CaO . SiO₂ 3CaO . SiO₂ 3CaO . Al2O₃ ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics In radiative heat transfer, a grey surface is the one, which has Emissivity independent of wavelength Equal brightness in all directions Grey appearance to the eye Zero reflectivity Emissivity independent of wavelength Equal brightness in all directions Grey appearance to the eye Zero reflectivity ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The predominant mode of heat transfer which takes place from boiler furnace to water walls of a boiler is Convection Both A & B Conduction Radiation Convection Both A & B Conduction Radiation ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Which of the following are made out of the carbon steel having carbon content of 0.9 to 1% ? Cutlery, screws, rivets and files Small punches, broaches reamers and springs Mandrels, twist drills, small lathe tools and razors Forgings like can shaft, structural steel plate, threading dies and drawing dies Cutlery, screws, rivets and files Small punches, broaches reamers and springs Mandrels, twist drills, small lathe tools and razors Forgings like can shaft, structural steel plate, threading dies and drawing dies ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The ratio of coil diameter to wire diameter of a spring is called the spring Form co-efficient Deflection None of these Index Form co-efficient Deflection None of these Index ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material? Steel Brass Glass Rubber Steel Brass Glass Rubber ANSWER DOWNLOAD EXAMIANS APP
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