Related Questions

In recuperative air preheaters, the heat is transferred
A From a metal wall from one medium to another
B From heating an intermediate material and then heating the air from this material
C By direct mixing
D Heat is transferred by bleeding some gases from furnace
__________ furnace is not an electric furnace.
A Arc
B Induction
C Pot
D Resistance
Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by
A Increasing the draft in the furnace
B Preheating the fuel gas
C Oxygen enrichment of combustion air
D Preheating the combustion air
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
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
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
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
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
Operation of blast furnace stove is based on the principles of a __________ furnace.
A Regenerative
B Recuperative
C Both A and B
D Neither A nor B

Next steps