CHEMICAL ENGINEERING BASICS QUIZ

The most detrimental impurity in high pressure boiler feed water is

Turbidity

Dissolved salt

Suspended salt

Silica

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'Flare tower' used in industry is meant for

Cooling of furnace exhaust gases

None of these

Absorbing the pollutant gases from the furnace exhaust

Venting off (after burning) the excess inflammable/toxic gases at high pressure

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A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.

400

300

200

150

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Friction factor for fluid flow in pipe does not depend upon the

Pipe length

Pipe roughness

Fluid density & viscosity

Mass flow rate of fluid

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

Molybdenun, tungsten & chromium

Cobalt, zirconium & molybdenum

Cobalt, chromium & tungsten

Cobalt, chromium & nickel

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There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.

None of these

Three

One

Two

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Angular displacement can be measured suitably by a

Tachometer

Linear variable differential transducer (LVDT)

Stroboscope

Shaft encoder

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Hydrogen in liquid steels is dissolved

As tiny gas bubbles

In the ionic form

In the molecular form

In the atomic form

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A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?

Brass

Steel

Glass

Rubber

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__________ is the most important element, which controls the physical properties of steel.

Manganese

Vanadium

Silicon

Carbon

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