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Chemical Engineering Basics

Chemical Engineering Basics
Fatigue resistance of a material is measured by the

Young's modulus
Ultimate tensile strength
Elastic limit
Endurance limit

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Chemical Engineering Basics
The process of removal of scale formed during hot rolling of steel is termed as

Pickling
Descaling
Shot blasting
Skimming

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Chemical Engineering Basics
Silicon crystal can be converted to p-type semi-conductor by doping with

Boron
Carbon
Phosphorous
Nitrogen

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Chemical Engineering Basics
In a casting, cold shut defect is caused by

Very low mould permeability
Low pounhg temperature
Faulty gating system
Melt-mould reactions

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Chemical Engineering Basics
Load cells used for the measurement of weight has

Provision of thermal compensation and is hermetically sealed
All of these
No moving parts and incurs negligible deflection under load
Compact & rugged construction with an accuracy of 0.1 to 1%

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Chemical Engineering Basics
At the point of boundary layer separation in fluid flow, the

Shear stress is maximum
Velocity gradient is flat
Density variation is maximum
Shear stress is zero

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