Furnace Technology — Part 1 MCQs with Explanations

Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air is the correct answer to “Overfire burning in a furnace is a phenomenon characterised by”. This question is standard in competitive examination syllabi for Furnace Technology.

None of these is the correct answer to “Which of the following variables does not affect the furnace capacity”. This question is standard in competitive examination syllabi for Furnace Technology.

Muffle furnace is the correct answer to “__________ is an indirectly heated furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

Blast furnace is the correct answer to “Reducing atmosphere is maintained in a”. This question is standard in competitive examination syllabi for Furnace Technology.

40 is the correct answer to “Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.”. This question is standard in competitive examination syllabi for Furnace Technology.

Gate is the correct answer to “Main gas valve in a gaseous fuel burner is a __________ valve.”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Ingress of cold air in the furnaces through cracks, charging doors, openings etc.”. This question is standard in competitive examination syllabi for Furnace Technology.

High pressure boiler is the correct answer to “Which furnace employs an I.D. fan for the removal of flue gases from the furnace”. This question is standard in competitive examination syllabi for Furnace Technology.

Feedwater is the correct answer to “The function of an economiser in a boiler is to preheat the”. This question is standard in competitive examination syllabi for Furnace Technology.

Reducing is the correct answer to “__________ atmosphere is maintained inside an iron blast furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

Annealing furnace is the correct answer to “Which of the following is a heat treatment furnace”. This question is standard in competitive examination syllabi for Furnace Technology.

High frequency induction is the correct answer to “The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

Arc is the correct answer to “An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

Both B and C is the correct answer to “Calcination of limestone to produce lime is done in a __________ kiln.”. This question is standard in competitive examination syllabi for Furnace Technology.

Glass is the correct answer to “Pot furnace which is either regenerative or recupterative, is used in the manufacture of”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by”. This question is standard in competitive examination syllabi for Furnace Technology.

Both A & B is the correct answer to “The heating capacity of muffle furnace depends on the”. This question is standard in competitive examination syllabi for Furnace Technology.

Stoichiometric combustion air is the correct answer to “Fuel economy in an industrial furnace operation can not be achieved by the use of”. This question is standard in competitive examination syllabi for Furnace Technology.

Oxygen in the flue gas is the correct answer to “Oxygen enrichment of combustion air does not result in increase of the”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Size of the combustion chamber of a furnace depends upon the”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Forced recirculation of furnace gases is practised”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “The amount of combustible escaping uncon-sumed from the furnace, depends upon the”. This question is standard in competitive examination syllabi for Furnace Technology.

Less is the correct answer to “Power required in case of forced draught as compared to induced draught (for the same draught produced) is”. This question is standard in competitive examination syllabi for Furnace Technology.

Boiler furnace is the correct answer to “Which is the most thermally efficient furnace”. This question is standard in competitive examination syllabi for Furnace Technology.

Sankey diagram is the correct answer to “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”. This question is standard in competitive examination syllabi for Furnace Technology.

Walking beam is the correct answer to “An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Which of the following variables affects the furnace capacity”. This question is standard in competitive examination syllabi for Furnace Technology.

Reduces its thermal efficiency is the correct answer to “Air filtration in a furnace”. This question is standard in competitive examination syllabi for Furnace Technology.

Combustion of coal by supplying it around the burner is the correct answer to “In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of”. This question is standard in competitive examination syllabi for Furnace Technology.

Underfired is the correct answer to “If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

< 2 is the correct answer to “Oxygen percentage in the flue gas coming out of a gaseous fuel fired furnace should be ideally about __________ percent.”. This question is standard in competitive examination syllabi for Furnace Technology.

None of these is the correct answer to “Hearth furnaces are not used for”. This question is standard in competitive examination syllabi for Furnace Technology.

85 is the correct answer to “The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “The heating capacity of continuous reheating furnace depends upon the”. This question is standard in competitive examination syllabi for Furnace Technology.

All of the above is the correct answer to “Means for giving direction to the circulation of gases in furnaces are”. This question is standard in competitive examination syllabi for Furnace Technology.

Premix is the correct answer to “If fuel and air are mixed ahead of the burner, it is called a/an __________ burner.”. This question is standard in competitive examination syllabi for Furnace Technology.

Blast furnace gas with air is the correct answer to “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”. This question is standard in competitive examination syllabi for Furnace Technology.

95% N2 + 5% H2 is the correct answer to “Protective gas used in the annealing furnace for steel coil comprises of”. This question is standard in competitive examination syllabi for Furnace Technology.

Pot is the correct answer to “__________ furnace is not an electric furnace.”. This question is standard in competitive examination syllabi for Furnace Technology.

Radiation of heat from the roof of the combustion chamber is the correct answer to “In reverberatory furnace, charge is heated mainly by”. This question is standard in competitive examination syllabi for Furnace Technology.