Chemical Engineering Basics Sub zero treatment of steel is done to Reduce the retained austenite in hardened steel Enhance its working performance in sub zero atmosphere Induce temper brittleness after its hardening Suppress martensite transformation Reduce the retained austenite in hardened steel Enhance its working performance in sub zero atmosphere Induce temper brittleness after its hardening Suppress martensite transformation ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Which of the following metals reacts violently with water ? Calcium Magnesium Mercury Sodium Calcium Magnesium Mercury Sodium ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics The best criterion for analysing an economic investment is the Future value method Present value method Rate of return criterion Salvage value Future value method Present value method Rate of return criterion Salvage value ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics For the irreversible reaction, Ca+ 2C = Ca C₂ , Δ H°298 = - 60000 J . mole⁻¹ . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be 240000 J 30000 J 60000 J 90000 J 240000 J 30000 J 60000 J 90000 J ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Which of the following is an example of stress corrosion ? Caustic embrittlement of steel Season cracking of brass Both (a) & (b) Neither (a) nor (b) Caustic embrittlement of steel Season cracking of brass Both (a) & (b) Neither (a) nor (b) ANSWER DOWNLOAD EXAMIANS APP
Chemical Engineering Basics Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure. Hexagonal close, packed (hcp) Simple cubic Body centred cubic (bcc) Face centred cubic (fcc) Hexagonal close, packed (hcp) Simple cubic Body centred cubic (bcc) Face centred cubic (fcc) ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS