FUELS AND COMBUSTION QUIZ

In Orsat's apparatus, ammoniacal cuprous chloride is used for selectivity absorbing

O₂

CO₂

CO

H₂O

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following would require maximum amount of % excess air for complete combustion?

Pulverised coal

Furnace oil

Coke oven gas

Lump coal (fixed on chain grate)

TRUE ANSWER : ?
YOUR ANSWER : ?

Gobar gas constitutes mainly of

CO & N₂

CH₄ & CO₂

CO & CO₂

CH₄ & N₂

TRUE ANSWER : ?
YOUR ANSWER : ?

Bomb calorimeter can be used to determine the __________ of the coal.

Both A & B

Calorific value

Sulphur content

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.

80-170

200-300

280-300

250-270

TRUE ANSWER : ?
YOUR ANSWER : ?

Ignition temperature decreases progressively from anthracite to lignite, because

Moisture content increases

Volatile matter content increases

Carbon content decreases

Ash content increases

TRUE ANSWER : ?
YOUR ANSWER : ?

For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³ ), while the C.V. is same on weight basis (i.e., kcal/kg) ?

Propane and acetylene

Sewage gas and gobar gas

Propane and LPG

F. gas and coke oven gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The hottest part of the flame lies in its____zone.

Luminous

Yellow

Unburnt gases

Non-luminous

TRUE ANSWER : ?
YOUR ANSWER : ?

Combustion of pulverised fuel

Suppresses the discharge of fine dust and grit into atmosphere

Requires larger combustion chamber than rich gaseous fuel

All of these

In a metallurgical furnace does not contaminate the product in the furnace by ash from fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Mott and Wheeler test is conducted on coke to find its

Reactivity with O₂

Volatile matter content

Phosphorus content

Abradability

TRUE ANSWER : ?
YOUR ANSWER : ?