FURNACE TECHNOLOGY QUIZ

Power required in case of forced draught as compared to induced draught (for the same draught produced) is

Either more or less; depends on the flue gas density Answer: Option B

Same

Less

More

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a heat treatment furnace?

Reheating furnace

Annealing furnace

Rotary kiln

Muffle furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Pulverised fuel fired furnaces employ __________ fuel firing.

Vertical

Tangential

Horizontal

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following furnaces, the gases are sucked through the stock bed from below?

Beehive oven

None of these

Sintering machine

Soaking pit

TRUE ANSWER : ?
YOUR ANSWER : ?

Tunnel kilns are usually used for

Drying/tempering of refractories

Roasting of pyrites

Melting of glass

Reheating of slabs

TRUE ANSWER : ?
YOUR ANSWER : ?

Example of an indirectly heated furnace is

Hood annealing furnace

Neither A nor B

Both A and B

Muffle furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The heat recoverable from flue gases of furnaces depends on the

Flue gas temperature drop through the furnace

Quantity of flue gases

Thermal efficiency of furnace

All of these

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Ingress of cold air in the furnaces through cracks, charging doors, openings etc.

Reduces the furnace draught

All of these

Reduces the flue gas temperature and makes the furnace atmosphere oxidising

Increases the load on the induced draft fan

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?

Increase in calorific value of the fuel

Saving in fuel consumption

Increase in flame temperature

Reduction in scale losses

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators as compared to recuperators for the same duty

Involve higher initial cost

Are lighter & compact

Store smaller quantity of waste heat

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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