Q.1
Reducing atmosphere is maintained in a
Q.2
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
Q.3
Circulation of gases in furnace is caused by the
Q.4
In a furnace operation, which is not preheated?
Q.5
Soaking pits are meant for heating steel
Q.6
Turn down ratio of a burner
Q.7
Advantages of use of preheated combustion air are
Q.8
In salt bath furnace, heat is transferred to the charge mainly by
Q.9
Reverberatory furnace is used for
Q.10
Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?
Q.11
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
Q.12
Unit of furnace loading is
Q.13
Which of the following is a batch furnace?
Q.14
Which of the following is a rotary furnace?
Q.15
Thermal efficiency of an open hearth furnace may be about __________ percent.
Q.16
Furnace pressure is normally controlled by regulating the
Q.17
An example of shaft furnace is the
Q.18
__________ is an indirectly heated furnace.
Q.19
Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.
Q.20
Rate of heat release in a furnace, which is the measure of heat intensity is defined as
Q.21
Large tonnage of refractory bricks are dried in a
Q.22
Which of the following is a directly fired intermittant furnace?
Q.23
To reduce the stack loss, heat recovery from flue gas can be done by
Q.24
Specific heating capacity of a furnace is expressed as
Q.25
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
Q.26
Maximum thermal efficiency of boiler may be about __________ percent.
Q.27
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
Q.28
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.
Q.29
Which furnace employs natural draft?
Q.30
Heat balance of furnace provides means of determining the
0 h : 0 m : 1 s