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Chemical Engineering Basics

Chemical Engineering Basics
Limestone addition in the blast furnace is done to flux __________ present in the raw materials.

P
Al2O₃
SiO₂
MnO₂

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Chemical Engineering Basics
Ignition of fuel in a diesel engine is by

Spark
Hot compressed air
None of these
Fuel injection

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

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

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Chemical Engineering Basics
Shaft/rotor speed is most accurately measured by a

Frequency counter
Speedometer
Tachometer
Strobometer

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Chemical Engineering Basics
Toughness of a material is measured by the

Scratch test
Universal testing machine
Vicker's hardness test
Notched bar test

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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
Cobalt, chromium & nickel
Molybdenun, tungsten & chromium
Cobalt, chromium & tungsten

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