FUELS AND COMBUSTION QUIZ

Abel apparatus is used for those oils, whose flash points are___°F.

300-600

>120

>280

TRUE ANSWER : ?
YOUR ANSWER : ?

The main drawback of supplying more excess air in the combustion of fuel is the

Excessive power requirement of air blower

Enhanced sensible heat loss in the flue gas

High exit flue gas temperature from the furnace

Intermittant and uncontrolled combustion of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is used for making the explosive 'TNT'?

Pyridine

Benzol

Cerosote

Toluene

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is the heaviest fuel gas out of the following?

Water gas

Coke oven gas

Blast furnace gas

Carburetted water gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Yield of pitch from distillation of high temperature tar is around __________ percent.

25

90

10

65

TRUE ANSWER : ?
YOUR ANSWER : ?

Coal tar (produced by high temperature carbonisation) is the main source of

Olefins

Aromatic compounds

Paraffins

Alphatic compounds

TRUE ANSWER : ?
YOUR ANSWER : ?

During combustion of coal on grate, clinker formation is increased by the

All of these

Low fusion point of ash (< 1100° C)

Use of thick fire bed

Use of preheated primary air

TRUE ANSWER : ?
YOUR ANSWER : ?

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

F. gas and coke oven gas

Coke oven gas and L.P.G

Blast furnace gas and naphtha vapor

Coke oven gas and converter gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of

Light paraffinic fuel oils is equal to that of equivalent olefins

N-paraffin is lower than that of iso-paraffins of the same compounds

Light paraffinic fuel oils is lower than that of equivalent olefins

Light paraffinic fuel oils is higher than that of equivalent olefins

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal is accelerated by the

Storage in large heaps

Absence of porous or friable particles

Storage in compressed piles

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?