SENTENCE CORRECTION QUIZ

Sometimes water is sprayed during coal charging in the coke oven, which helps in

Controlling the dust nuisance while charging the coal

Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H₂ in the gas (due to the endothermic reaction represented by C + H₂O = CO + H₂)

All of these

Prevention of clinker formation in the oven

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick the odd man out.

Oil gas

Pitch creosote mixture

Briquettes

Wood

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ prohibits the use of alcohols directly in petrol engines.

High cost & availability

Low flash point

Low octane number

Low calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.

55

25

75

5

TRUE ANSWER : ?
YOUR ANSWER : ?

Pensky-Marten apparatus is used for those oils, whose flash points are __________ °F.

90-110

>120

TRUE ANSWER : ?
YOUR ANSWER : ?

Main constituent of natural gas is

C₃H₈

C₂H₆

CH₄ (upto 90%)

H₂

TRUE ANSWER : ?
YOUR ANSWER : ?

In flue gas analysis by Orsat's apparatus, oxygen is absorbed by

Potassium hydroxide

Cuprous chloride

Alkaline pyragllol solution

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Spontaneous combustion of coal on storage results due to

Low temperature oxidation

Inadequate ventilation

All of these

Storage in large heaps with small surface to volume ratio

TRUE ANSWER : ?
YOUR ANSWER : ?

(64-132) rank coal (ASTM) means a coal with 64%

Fixed carbon and a heating value of 132 BTU/1b

None of these

Ash and a heating value of 13, 200 BTU/1b

Fixed carbon and having a heat value of 13, 200 BTU/1b

TRUE ANSWER : ?
YOUR ANSWER : ?

Anthracite can be used for

Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke

All of these

Making carbon electrodes

Recarbonising steel

TRUE ANSWER : ?
YOUR ANSWER : ?

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