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Furnace Technology Quiz 2

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Furnace Technology Quiz 2

1 / 50

Scaling of furnace stock is reduced by ________ in flue gas?

2 / 50

Protective gas used in the annealing furnace for steel coil comprises of___________?

3 / 50

Regenerators are normally provided in the______?

4 / 50

Rotary kilns are used in the______?

5 / 50

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

6 / 50

Soaking pits are meant for heating steel__________?

7 / 50

The rate of scaling of furnace stock depends upon the__________?

8 / 50

The heating capacity of muffle furnace depends on the__________?

9 / 50

The electric furnace in which heat is produced by a combination of induced current and skin effect is called ______ furnace?

10 / 50

Regenerators compared to the recuperators for the same duty___________?

11 / 50

Thermal efficiency of a limestone calcination rotary kiln may be around _______ percent?

12 / 50

Power required in case of forced draught as compared to induced draught (for the same draught produced) is_____?

13 / 50

Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about _____ percent?

14 / 50

Maximum heat transfer in high temperature furnaces is by______?

15 / 50

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about ______ percent?

16 / 50

The resistance furnace produces heat by the___________?

17 / 50

Pick out the wrong statement ?

18 / 50

Reducing atmosphere is maintained in a___________?

19 / 50

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600?C, the percentage stack loss will be maximum in case of complete combustion of__________?

20 / 50

Reheating furnace (pusher type) is used for heating_______?

21 / 50

The function of an economiser in a boiler is to preheat the _______?

22 / 50

The amount of combustible escaping unconsumed from the furnace, depends upon the_________?

23 / 50

The heating capacity of muffle furnace depends on the______?

24 / 50

Specific heating capacity of a furnace is expressed as_______?

25 / 50

Large tonnage of refractory bricks are dried in a_______?

26 / 50

Regenerators as compared to recuperators for the same duty__________?

27 / 50

Rate of heat release in a furnace, which is the measure of heat intensity, is defined as__________?

28 / 50

Regenerators are used for waste heat recovery in______?

29 / 50

The reason for excessive clinker formation in gas producers is the_______?

30 / 50

Shaft furnaces are used for_________?

31 / 50

Size of the combustion chamber of a furnace depends upon the _____?

32 / 50

Neutral atmosphere is maintained in a/an _____ furnace?

33 / 50

Presence of SO2 in furnace gases attacks the ferrous metal by way of__________?

34 / 50

Pot furnace which is either regenerative or recuperative, is used in the manufacture of______?

35 / 50

Means for giving direction to the circulation of gases in furnaces are_______?

36 / 50

The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about _____ percent?

37 / 50

Maximum thermal efficiency of boiler may be about ______ percent?

38 / 50

Overfire burning in a furnace is a phenomenon characterised by______?

39 / 50

The main function of a muffle in the muffle furnace is to___________?

40 / 50

Ingress of cold air in the furnaces through cracks, charging doors, openings etc _________?

41 / 50

Ostwald charts are meant for___________?

42 / 50

Main gas valve in a gaseous fuel burner is a _______ valve?

43 / 50

Thermal efficiency of an open hearth furnace may be about ______ percent?

44 / 50

The purpose of controlling the furnace atmosphere is to prevent surface attack by___________?

45 / 50

Regenerators are installed in________?

46 / 50

Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about ______ percent?

47 / 50

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

48 / 50

Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by________?

49 / 50

The advantages of firing pulverised coal in the furnace lies in the fact that, it_______?

50 / 50

Pulverised fuel fired furnaces employ _______ fuel firing?

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