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Furnace Technology Quiz 1


Furnace Technology Quiz 1

1 / 50

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

2 / 50

Hearth furnaces are not used for______?

3 / 50

Coke ovens in steel plant are heated by______?

4 / 50

In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of__________?

5 / 50

Combustion of fuel in a furnace with oxygen enriched air results in higher___________?

6 / 50

Ceramic recuperators compared to metallic recuperators for the same duty__________?

7 / 50

Higher furnace temperature cannot be achieved by use of a lean fuel gas in the furnace by__________?

8 / 50

In order to maintain an oxidising atmosphere in a furnace, it should have___________?

9 / 50

Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above ______ ?C?

10 / 50

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

11 / 50

______ furnace is not an electric furnace?

12 / 50

Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the__________?

13 / 50

Air filtration in a furnace_____?

14 / 50

Fuel economy in an industrial furnace operation cannot be achieved by the use of___________?

15 / 50

Furnace aerodynamics is related to the ______ in the furnace?

16 / 50

An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called _____ furnace?

17 / 50

Dampers are located___________?

18 / 50

Cement Kiln is a_____?

19 / 50

In reverberatory furnace, charge is heated mainly by___________?

20 / 50

In practical operation of any furnace, zero oxygen percentage or theoretical CO2 percentage in flue gas is rarely achieved, because of___________?

21 / 50

Forced recirculation of furnace gases is practised________?

22 / 50

In a muffle furnace, the muffle__________?

23 / 50

Artificial draught produced by a fan in the furnace can be controlled by the_____?

24 / 50

Advantages of use of preheated combustion air are___________?

25 / 50

Circulation of gases in furnace is caused by the__________?

26 / 50

An example of shaft furnace is the___________?

27 / 50

_______ is an indirectly heated furnace?

28 / 50

Flue gas outlet temperature from the chimney of any furnace should be ideally about _______ ?C?

29 / 50

Heat balance of furnace provides means of determining the__________?

30 / 50

Decarburisation of steel___________?

31 / 50

Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an___________?

32 / 50

In furnaces operating at very high temperature (say) 1250?C, e.g. soaking pit), the maximum heat transfer takes place by___________?

33 / 50

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

34 / 50

An example of recuperative furnace is the___________?

35 / 50

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of__________?

36 / 50

Furnace pressure is normally controlled by regulating the___________?

37 / 50

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

38 / 50

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

39 / 50

In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the___________?

40 / 50

In salt bath furnace, heat is transferred to the charge mainly by ___________?

41 / 50

Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400?C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200?C ?

42 / 50

An improved and fuel efficient version of the pusher type reheating furnace is the _______ furnace?

43 / 50

An example of indirectly heated furnace is the__________?

44 / 50

An example of a periodic furnace is the___________?

45 / 50

Fuel economy in furnaces can be achieved by__________?

46 / 50

Amount of coal lost in ash particle, which is carried through the boiler system, depends upon the___________?

47 / 50

Example of an indirectly heated furnace is___________?

48 / 50

In low or standard frequency induction furnace, heat is produced by the_________?

49 / 50

______ atmosphere is maintained inside an iron blast furnace?

50 / 50

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

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