FURNACE TECHNOLOGY QUIZ

The method of Lobo and Evans is concerned with the calculation of the

Mass transfer co-efficient

Heat absorption in radiant section of a furnace

Heat transfer by forced convection in a reboiler

Heat transfer in vacuum condensers

TRUE ANSWER : ?
YOUR ANSWER : ?

If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.

Sidefired

Recirculating

Covered

Underfired

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Operation of blast furnace stove is based on the principles of a __________ furnace.

Recuperative

Both A and B

Neither A nor B

Regenerative

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An example of indirectly heated furnace is the

Muffle furnace

Reheating furnace

Soaking pit

None of these

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A refractory wall separating the stock and the source of heat is provided in a

Continuous furnace

None of these

Muffle furnace

Updraft kiln

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If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.

Premix

Outside mixing type

Rotary

Diffusion

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

None of these

Sintering machine

Soaking pit

Beehive oven

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While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

2000

4500

6000

3000

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Reheating furnace (pusher type) is used for heating

Ingots

Steel sheets

Slabs

Steel coils

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Turn down ratio of a burner

Is normally much more for a continuous furnace as compared to a batch furnace

Is the ratio of maximum to minimum permissible heat input rates

Should be 1:1 for a batch type furnace.

Should be as low as possible i.e., 1 : 2

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YOUR ANSWER : ?

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