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Chemical Engineering Basics

Chemical Engineering Basics
Grain hardness is measured by the __________ hardness testing method.

Shore sceleroscope
Knoop
Rockwell F
Vicker's

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Chemical Engineering Basics
Oxygen cylinders used for autogenous (cutting/welding) purposes are

Seamless & made of steel
Made by sand casting
Heat treated before use
Welded steel cylinders

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Chemical Engineering Basics
Steel produced from phosphatic iron is __________ in nature.

Malleable
Ductile
Tough
Brittle

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Chemical Engineering Basics
Frost formation on the evaporator tubes in the domestic refrigerators

Is immaterial
Can be prevented by proper design
Decreased compressor power
Causes heat loss due to poor heat transfer

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Chemical Engineering Basics
Pick out the wrong statement. If the net positive suction head (NPSH) requirement of a pump is not satisfied, then

It will be cavitated
It will not develop sufficient head to raise water
Its efficiency will not be affected
It will deliver low discharge of liquid

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Chemical Engineering Basics
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)₂ __________ with increasing temperature.

Increases
None of these
Shows inversion of solubility
Decreases

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