Related Questions

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
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
A Increase
B Decrease
C Increase or decrease depending on the fuel type
D Not change
Use of preheated air for combustion of fuel in the furnace, increases the
A Scale losses of the furnace stock
B Calorific value of the fuel
C Flame temperature
D None of these
Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?
A Increase in calorific value of the fuel
B Increase in flame temperature
C Reduction in scale losses
D Saving in fuel consumption
Use of excess of combustion air in the combustion of fuels results in
A Heat losses
B Long flame
C Condensation of water vapour from the fuel gas
D None of these
Deficiency of combustion air during combustion of a gaseous fuel
A Lengthens the flame
B Causes heat loss of fuel by its partial combustion
C Both A & B
D Shortens the flame
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A High neutron absorption cross-section
B Low moderating efficiency
C High neutron scatter cross-section
D Low neutron absorption cross-section
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
A Heavy water
B Graphite
C Carbon dioxide
D No moderator is needed
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
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.
A CO content
B Dew point
C CO2 content
D O2 content

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