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Chemical Engineering Basics

Chemical Engineering Basics
The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Bright annealing
Full annealing
Patenting
None of these

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

Zirconia
Magnesia
Alumina
Beryllia

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Chemical Engineering Basics
Milligram of KOH required to saponify 1 gm of oil is called its __________ number.

Emulsion
Saponification
Precipitation
Acid

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Chemical Engineering Basics
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

2000
2400
1800
3000

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Chemical Engineering Basics
Speed of a submarine in deep sea & that of an aeroplane is measured by a/an

Stroboscope
Hot wire anemometer
Rotameter
Pitot tube

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Chemical Engineering Basics
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the

Sufficient hydrogen present in the welding arc
Martensite formation
Retained austenite
Relatively high sulphur content in the base metal

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