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Furnace Technology

Furnace Technology
__________ is an indirectly heated furnace.

Muffle furnace
Soaking pit
Open hearth furnace
Reheating furnace

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

Physical nature, ash content and fineness of the coal
Amount of excess air supplied and load on the boiler
All of these
Type of burner and combustion chamber

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Furnace Technology
Which of the following is a batch furnace?

Glass tank furnace
Reheating furnace
Cupola
None of these

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Furnace Technology
Maximum thermal efficiency of boiler may be about __________ percent.

65
25
90
10

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Furnace Technology
Which of the following is not a recuperative furnace?

Steamboiler
Coke oven
Reheating furnace
Soaking pit

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Furnace Technology
The resistance furnace produces heat by the

Flow of current through a heating element
Combination of induced current and skin effect
None of these
Electric arc struck between electrodes and the charge

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