CHEMICAL ENGINEERING BASICS QUIZ

Coke is added in the blast furnace to

Reduce & melt the iron ore

Remove sulphur & phosphorus from molten metal

None of these

Increase the fluidity of slag

TRUE ANSWER : ?
YOUR ANSWER : ?

At the point of boundary layer separation in fluid flow, the

Shear stress is zero

Shear stress is maximum

Velocity gradient is flat

Density variation is maximum

TRUE ANSWER : ?
YOUR ANSWER : ?

Dezincification is a form of corrosion, which specifically applies to

Steel

Brass

Babbit metal

Stainless steel

TRUE ANSWER : ?
YOUR ANSWER : ?

Hydrogen in liquid steels is dissolved

In the molecular form

As tiny gas bubbles

In the atomic form

In the ionic form

TRUE ANSWER : ?
YOUR ANSWER : ?

Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

Insulator

Semi-conductor

None of these

Conductor

TRUE ANSWER : ?
YOUR ANSWER : ?

A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

0.44

0.25

0.33

TRUE ANSWER : ?
YOUR ANSWER : ?

Powder metallurgy is used to produce

Components of large size

Porosity free components

High precision components with complex cavities and sharp features

Components of such alloys whose constituents do not form alloys readily

TRUE ANSWER : ?
YOUR ANSWER : ?

Carbon is present in the form of __________ in grey cast iron.

Spheroids

Cementite

Flakes

Nodular aggregates of graphite

TRUE ANSWER : ?
YOUR ANSWER : ?

During sensible cooling of air, its wet bulb temperature

Decreases & the dew point increases

Increases but dew point remains constant

Increases & the dew point decreases

Decreases but dew point remains constant

TRUE ANSWER : ?
YOUR ANSWER : ?

Surface tension is due to the __________ forces.

Difference between adhesive & cohesive

Adhesive

Cohesive

Viscous

TRUE ANSWER : ?
YOUR ANSWER : ?

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