CHEMICAL ENGINEERING BASICS QUIZ

1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).

100

10000

10

1000

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YOUR ANSWER : ?

Angular displacement can be measured suitably by a

Shaft encoder

Linear variable differential transducer (LVDT)

Tachometer

Stroboscope

TRUE ANSWER : ?
YOUR ANSWER : ?

Source of heat supply in a cupola is

Charcoal

Lumpy coal

Coke

Pulverised coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Swaging is a/an __________ operation.

Drawing

Piercing

Extrusion

Forging

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YOUR ANSWER : ?

Which of the following is a boiler accessory i.e., not a boiler mounting ?

Feed water pump

Stop valve

Feed check valve

Blow off cock

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YOUR ANSWER : ?

Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

Body centred cubic (bcc)

Hexagonal close, packed (hcp)

Simple cubic

Face centred cubic (fcc)

TRUE ANSWER : ?
YOUR ANSWER : ?

Load cells used for the measurement of weight has

Provision of thermal compensation and is hermetically sealed

No moving parts and incurs negligible deflection under load

All of these

Compact & rugged construction with an accuracy of 0.1 to 1%

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?

Economiser tube life increases due to handling of low temperature water

Scale formation rate on economiser tubes increases

Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases

It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water

TRUE ANSWER : ?
YOUR ANSWER : ?

In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :

Jet of water at high pressure

Mixture of water and air

Rain of molten lead

Blast of air

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

Mass flow rate of fluid

Pipe roughness

Fluid density & viscosity

Pipe length

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YOUR ANSWER : ?