FUELS AND COMBUSTION QUIZ

Gross heating value of coal is __________ the net heating value.

Higher than

Lower than

Same as

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Bulk density of pulverised coal may be about __________ kg/m³.

1000

100

500

1500

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of force moisture in coal is most disadvantageous during its

Transportation and handling

Pulverisation

Storage

Washing

TRUE ANSWER : ?
YOUR ANSWER : ?

Gross and net calorific value of a fuel will be the same

Ifits carbon content is very low

Under no circumstances

If its hydrogen/hydrogen compound content is zero

If its ash content is zero

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boiler furnace provides

Less erosion on furnace walls

Smokeless burning

Better combustion

High calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

'Mixed gas' used in steel plants is a mixture of

Blast furnace gas and naphtha vapor

F. gas and coke oven gas

Coke oven gas and L.P.G

Coke oven gas and converter gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

MgO & Na₂CO₃

MgSO₄ & BaCl₂

BaSO₄ & NaCl

MgCO₃ & NaCl

TRUE ANSWER : ?
YOUR ANSWER : ?

A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

Higher carbon monoxide content

Higher methane content and thus higher calorific value

Lower carbon dioxide content

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most reactive (as regards the formation of CO + H₂ from C + H₂O) ?

Sub-bituminous coal

Low temperature coke

Blast furnace coke

Anthracite coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Orsat apparatus is meant for

Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride

Gravimetric analysis of flue gas

None of these

Finding out combustion efficiency

TRUE ANSWER : ?
YOUR ANSWER : ?

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