FURNACE TECHNOLOGY QUIZ

In order to maintain an oxidising atmosphere in a furnace, it should have

More of CO in flue gas

More of excess air

Less of excess air

More of CO₂ in flue gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

Quantity of flue gases

Thermal efficiency of furnace

Flue gas temperature drop through the furnace

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Rate of heat release in a furnace, which is the measure of heat intensity is defined as

None of these

Kcal/hr/m³ combustion space

Kcal/m³ combustion space

Kcal/hr

TRUE ANSWER : ?
YOUR ANSWER : ?

Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the

Amount of excess air supplied and load on the boiler

Physical nature, ash content and fineness of the coal

Type of burner and combustion chamber

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Forced recirculation of furnace gases is practised

All of these

In furnaces, operating below 750°C

To increase heat transfer by convection

To ensure uniform temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Ostwald charts are meant for

None of these

Calculation of flue gas temperature

Computation of flue gas analysis

Computing the excess/deficiency of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Shaft furnaces are used for

Calcining

Roasting

Smelting

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?

Reduction in scale losses

Increase in calorific value of the fuel

Saving in fuel consumption

Increase in flame temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Neutral atmosphere is maintained in a/an __________ furnace.

Soaking pit

Walking beam reheating

Cold rolled steel coil annealing

Open hearth

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is an indirectly heated furnace.

Muffle furnace

Reheating furnace

Open hearth furnace

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

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