Very high pressure boilers are usually __________ boilers.
Very high pressure boilers are usually __________ boilers.
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an
While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.
While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
Regenerators are installed in
Regenerators are installed in
In a furnace operation, which is not preheated?
In a furnace operation, which is not preheated?
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.
Heat balance of furnace provides means of determining the
Heat balance of furnace provides means of determining the
Which of the following is not a recuperative furnace?
Which of the following is not a recuperative furnace?
In a furnace employing forced draught as compared to induced draught,
In a furnace employing forced draught as compared to induced draught,
Unit of furnace loading is
Unit of furnace loading is
Reheating furnace (pusher type) is used for heating
Reheating furnace (pusher type) is used for heating
In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the
In producer gas making furnace, steam is added along with air to mainly control the
In producer gas making furnace, steam is added along with air to mainly control the
Recuperator is
Recuperator is
Ostwald charts are meant for
Ostwald charts are meant for
Coke ovens in steel plant are heated by
Coke ovens in steel plant are heated by
Soaking pits are meant for heating steel
Soaking pits are meant for heating steel
Ceramic recuperators compared to metallic recuperators for the same duty
Ceramic recuperators compared to metallic recuperators for the same duty
Which one is not an induced draught furnace?
Which one is not an induced draught furnace?
In low or standard frequency induction furnace, heat is produced by the
In low or standard frequency induction furnace, heat is produced by the
Maximum thermal efficiency of boiler may be about __________ percent.
Maximum thermal efficiency of boiler may be about __________ percent.
Pick out the wrong statement.
Pick out the wrong statement.
Turn down ratio of a burner
Turn down ratio of a burner
To reduce the stack loss, heat recovery from flue gas can be done by
To reduce the stack loss, heat recovery from flue gas can be done by
Rotary kilns are used in the
Rotary kilns are used in the
Regenerators are normally provided in the
Regenerators are normally provided in the
An example of shaft furnace is the
An example of shaft furnace is the
Regenerators as compared to recuperators for the same duty
Regenerators as compared to recuperators for the same duty
Which furnace employs natural draft?
Which furnace employs natural draft?
Artificial draught produced by a fan in the furnace can be controlled by the
Artificial draught produced by a fan in the furnace can be controlled by the
Specific heating capacity of a furnace is expressed as
Specific heating capacity of a furnace is expressed as
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.
Regenerators are used for waste heat recovery in
Regenerators are used for waste heat recovery in
A refractory wall separating the stock and the source of heat is provided in a
A refractory wall separating the stock and the source of heat is provided in a
Shaft furnaces are used for
Shaft furnaces are used for
Which of the following accentuates clinker-ing troubles on furnace grate burning coal?
Which of the following accentuates clinker-ing troubles on furnace grate burning coal?
The heat recoverable from flue gases of furnaces depends on the
The heat recoverable from flue gases of furnaces depends on the
Furnace aerodynamics is related to the __________ in the furnace.
Furnace aerodynamics is related to the __________ in the furnace.
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
Heat transfer rate to the stock/charge in the furnace does not depend upon the
Heat transfer rate to the stock/charge in the furnace does not depend upon the
Use of pulverised coal in boilers provides
Use of pulverised coal in boilers provides
The purpose of controlling the furnace atmosphere is to prevent surface attack by
The purpose of controlling the furnace atmosphere is to prevent surface attack by
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?
Heat transfer rate to the charge/stock in a furnace does not depend upon the
Heat transfer rate to the charge/stock in a furnace does not depend upon the
Turndown ratio of a burner gives an idea of the __________ in the furnace.
Turndown ratio of a burner gives an idea of the __________ in the furnace.
Which of the following is a directly fired intermittant furnace?
Which of the following is a directly fired intermittant furnace?
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.
Regenerators compared to the recuperators for the same duty
Regenerators compared to the recuperators for the same duty
In which of the following furnaces, the gases are sucked through the stock bed from below?
In which of the following furnaces, the gases are sucked through the stock bed from below?
Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an
Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an
Furnace pressure is normally controlled by regulating the
Furnace pressure is normally controlled by regulating the
Thermal efficiency of an open hearth furnace may be about __________ percent.
Thermal efficiency of an open hearth furnace may be about __________ percent.
Which of the following is not an additive for flue gases from furnace to reduce its dew-point?
Which of the following is not an additive for flue gases from furnace to reduce its dew-point?
