Related Questions

Overfire burning in a furnace is a phenomenon characterised by the
A Supply of excess fuel
B Supply of excess air
C Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
D None of these
Which of the following accentuates clinker-ing troubles on furnace grate burning coal?
A Low reactivity of carbonised residue containing high proportion of iron & sulphur
B Low forced draft & fuel bed temperature
C Thick firebed and preheated primary air
D All of the above
Over fire burning is the phenomenon of
A Supply of excess, air
B Supply of excess coal
C Burning CO and unburnt in upper zone of furnace by supplying more air
D Fuel bed firing
Which furnace employs an I.D. fan for the removal of flue gases from the furnace?
A Coke oven
B Blast furnace stoves
C Beehive coke oven
D High pressure boiler
Black smoke coming out of the chimney of a furnace is an indication of the use of __________ in the furnace.
A Low amount of excess combustion air
B Large quantity of excess combustion air
C Hydrocarbon fuel
D Pulverised coal as fuel
The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.
A Arc
B Resistance
C Low frequency induction
D High frequency induction
An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace.
A Resistance
B Arc
C Low frequency induction
D None of these
An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
A Walking beam
B Shaft
C Tunnel
D Rotary hearth
__________ furnace is not an electric furnace.
A Arc
B Induction
C Pot
D Resistance
Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
A Graphite powder
B Thoria
C Zircon powder
D Beryllium

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