FURNACE TECHNOLOGY QUIZ

Rotary kilns are used in the

Neither A nor B

Both A and B

Calcination of limestone & dolomite

Cement manufacture

TRUE ANSWER : ?
YOUR ANSWER : ?

The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

65

50

85

99

TRUE ANSWER : ?
YOUR ANSWER : ?

Example of an indirectly heated furnace is

Hood annealing furnace

Muffle furnace

Both A and B

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are installed in

Open hearth furnace

Coke ovens

Neither A nor B

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

40

65

20

80

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace stoves are meant for heating

Air

Steam

None of these

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The main function of a muffle in the muffle furnace is to

Smooth out temperature inequalities on the combustion side of the muffle wall

Protect the charge from the effects of the products of combustion

Both A & B

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?

Excessive fly ash discharge from the stack

Erosion of induced draft fan blades

Ash disposal problem

Higher power consumption in its transportation

TRUE ANSWER : ?
YOUR ANSWER : ?

Furnace pressure is normally controlled by regulating the

Damper

Speed of I.D. fan

Air pressure

Fuel gas pressure

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

Conduction

Radiation

TRUE ANSWER : ?
YOUR ANSWER : ?

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