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Chemical Engineering Basics

Chemical Engineering Basics
Powder metallurgy process does not make metal powder by

Atomisation
Electrolytic deposition
Grinding/milling
Hammering

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Chemical Engineering Basics
Which of the following is an example of cathodic protection of metals against corrosion ?

Lead lined reactor
Galvanised iron
Case hardened steel
Painted steel

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Chemical Engineering Basics
Sub zero treatment of steel is done to

Suppress martensite transformation
Enhance its working performance in sub zero atmosphere
Induce temper brittleness after its hardening
Reduce the retained austenite in hardened steel

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Chemical Engineering Basics
In age-hardenable alloys, maximum ductility is obtained

In as cast state
After overageing
After optimum ageing
Immediately after solution treatment and subsequent quenching

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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

60000 J
90000 J
240000 J
30000 J

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Chemical Engineering Basics
Rankine cycle comprises of two isothermal and two __________ processes.

Isobaric
Isentropic
None of these
Polytropic

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