Chemical Engineering Basics Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. Simple cubic Hexagonal close, packed (hcp) Body centred cubic (bcc) Face centred cubic (fcc) Simple cubic Hexagonal close, packed (hcp) Body centred cubic (bcc) Face centred cubic (fcc) ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Lead is added to 60:40 brass primarily to improve Corrosion resistance Machinability Strength Fluidity Corrosion resistance Machinability Strength Fluidity ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The stress at which a metal fails by fatigue lies Near the fracture point of the stress-strain curve None of these In the plastic range In the elastic range Near the fracture point of the stress-strain curve None of these In the plastic range In the elastic range ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics In a casting, cold shut defect is caused by Very low mould permeability Low pounhg temperature Faulty gating system Melt-mould reactions Very low mould permeability Low pounhg temperature Faulty gating system Melt-mould reactions ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent. 150 200 400 300 150 200 400 300 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
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