FURNACE TECHNOLOGY QUIZ

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

Ash disposal problem

Higher power consumption in its transportation

Erosion of induced draft fan blades

Excessive fly ash discharge from the stack

TRUE ANSWER : ?
YOUR ANSWER : ?

Circulation of gases in furnace is caused by the

Furnace pressure in conjunction with draft in flues

All of these

Difference in density between hot and cold gases

Change in volume during a change of temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

130

80

180

250

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 : ?

Which of the following is a natural draft furnace?

None of these

Power plant boilers

Sintering furnace

Blast furnace stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

Cement Kiln is a

Batch furnace

Tunnel Kiln

Rotary Kiln

Natural draft furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

The rate of scaling of furnace stock depends upon the

Time

Temperature

All of these

Nature of atmosphere

TRUE ANSWER : ?
YOUR ANSWER : ?

The resistance furnace produces heat by the

None of these

Flow of current through a heating element

Electric arc struck between electrodes and the charge

Combination of induced current and skin effect

TRUE ANSWER : ?
YOUR ANSWER : ?

Very high pressure boilers are usually __________ boilers.

Waste heat

Fire tube

Water tube

Natural circulation

TRUE ANSWER : ?
YOUR ANSWER : ?

Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

1050

750

1250

350

TRUE ANSWER : ?
YOUR ANSWER : ?

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