FURNACE TECHNOLOGY QUIZ

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

Preheating the combustion air

Preheating the fuel gas

All of these

Oxygen enrichment of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Calcination of limestone to produce lime is done in a __________ kiln.

Rotary

Tunnel

Vertical shaft

Both B and C

TRUE ANSWER : ?
YOUR ANSWER : ?

Ceramic recuperators compared to metallic recuperators for the same duty

Are less costly

Occupy more space

Are lighter

Have higher pressure differential between flue gas & air side

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ is an indirectly heated furnace.

Muffle furnace

Soaking pit

Open hearth furnace

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

Alkaline powders

Ammonia

None of these

Fine dolomite

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat transfer rate to the charge/stock in a furnace does not depend upon the

Emissivity of refractory walls

Flue gas temperature

Initial temperature of the charged stock

Type of fuels viz solid, liquid or gaseous

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a heat treatment furnace?

Muffle furnace

Rotary kiln

Annealing furnace

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a periodic furnace?

Soaking pit

Reheating furnace

Rotary kiln

Tunnel kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of

High thermal conductivity

Both A and B

Low emissivity

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a batch furnace?

Cupola

Reheating furnace

Glass tank furnace

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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