FURNACE TECHNOLOGY QUIZ

Dampers are located

After the I.D. fan

Before the I.D fan

Near the top of the chimney

Anywhere after the I.D. fan

TRUE ANSWER : ?
YOUR ANSWER : ?

Ostwald charts are meant for

Calculation of flue gas temperature

None of these

Computation of flue gas analysis

Computing the excess/deficiency of combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

To reduce the stack loss, heat recovery from flue gas can be done by

Steam generation in waste heat boilers

Preheating of combustion air

All of these

Preheating of cold stock

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ furnace is not an electric furnace.

Pot

Resistance

Arc

Induction

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum heat transfer in high temperature furnaces is by

Either A, B or C; depends on the type of furnace

Convection

Radiation

Conduction

TRUE ANSWER : ?
YOUR ANSWER : ?

Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C.

250

50

150

100

TRUE ANSWER : ?
YOUR ANSWER : ?

Turn down ratio of a burner

Is the ratio of maximum to minimum permissible heat input rates

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

Should be 1:1 for a batch type furnace.

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum thermal efficiency of boiler may be about __________ percent.

90

25

65

10

TRUE ANSWER : ?
YOUR ANSWER : ?

Cement Kiln is a

Rotary Kiln

Natural draft furnace

Batch furnace

Tunnel Kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

Tunnel

Rotary hearth

Shaft

Walking beam

TRUE ANSWER : ?
YOUR ANSWER : ?

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