FUELS AND COMBUSTION QUIZ

A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon

None of these

Requires smaller combustion space and less secondary air

Is more difficult to ignite and produces a shorter flame

Is less liable to spontaneous combustion on storage

TRUE ANSWER : ?
YOUR ANSWER : ?

Coking time in narrow by-product coke ovens is around __________ hours.

8

80

18

48

TRUE ANSWER : ?
YOUR ANSWER : ?

Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.)

NCV at constant volume

GCV at constant volume

NCV at constant pressure

GCV at constant pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

1kg mole

32 kg

All of these

22.4 Nm³

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.

15, 000

5000

25, 000

10, 000

TRUE ANSWER : ?
YOUR ANSWER : ?

Calorific value of

Light paraffinic fuel oils is equal to that of equivalent olefins

Light paraffinic fuel oils is lower than that of equivalent olefins

Light paraffinic fuel oils is higher than that of equivalent olefins

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following has the least calorific value (kcal/Nm³) ?

Coke oven gas

Sewage gas

Natural gas

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Purity of coke means that, it is high in carbon and low in

Volatiles

Ash

Iron

Moisture

TRUE ANSWER : ?
YOUR ANSWER : ?

The calorific value of L.D. converter gas is about __________ Kcal/Nm³ .

4500

1800

10000

800

TRUE ANSWER : ?
YOUR ANSWER : ?

Producer gas comprises mainly of

CO₂ & N₂

CO & H₂

CO & N₂

CO₂ & H₂

TRUE ANSWER : ?
YOUR ANSWER : ?