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CHEMICAL ENGINEERING BASICS

Chemical Engineering Basics
Paint spray gun works on the principle of

Newton's law of viscosity
None of these
Boyle's law
Bernoulli's theorem

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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

90000 J
240000 J
30000 J
60000 J

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Chemical Engineering Basics
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.

Beryllia
Magnesia
Zirconia
Alumina

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Chemical Engineering Basics
Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are

Cobalt, zirconium & molybdenum
Molybdenun, tungsten & chromium
Cobalt, chromium & nickel
Cobalt, chromium & tungsten

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Chemical Engineering Basics
Which of the following welding processes employs the highest welding temperature ?

Resistance welding
Thermit welding
Gas welding
Arc welding

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