FUELS AND COMBUSTION QUIZ

Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

70-100

15-30

150-200

43832

TRUE ANSWER : ?
YOUR ANSWER : ?

Low temperature oxidation of coal is accelerated by the

All of these

Storage in compressed piles

Absence of porous or friable particles

Storage in large heaps

TRUE ANSWER : ?
YOUR ANSWER : ?

Junker's calorimeter is used to determine the calorific value of

Fuel oil

None of these

Gaseous fuels

Pulverised coal

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen percentage (by weight) in atmospheric air is

23

29

19

21

TRUE ANSWER : ?
YOUR ANSWER : ?

Stack heat losses can be minimised by

Maintaining proper draft in the furnace

Controlling the excess air

Using low c.v. fuels

Oxygen enrichment of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Coke made in narrower by-product coke ovens (as compared to wider ovens) is

Less reactive

Smaller in size

Stronger

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of

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 equal to that of equivalent olefins

Light paraffinic fuel oils is higher than that of equivalent olefins

TRUE ANSWER : ?
YOUR ANSWER : ?

Moisture loss is determined by the

Moisture content of fuel

Both A and B

Humidity of combustion air

The water formed by combustion reaction

TRUE ANSWER : ?
YOUR ANSWER : ?

Steam is intermittently admitted into the fuel bed during the production of producer gas to

Convert CO to CO₂

Minimise the chances of clinker formation

Increase the gas production rate

Increase the combustion rate

TRUE ANSWER : ?
YOUR ANSWER : ?

Air/gas ratio for complete combustion will be the highest for

Carburetted water gas

Coke oven gas

LPG

Gobar gas

TRUE ANSWER : ?
YOUR ANSWER : ?