Search
.Management Sciences
Category: Fuels and Combustion
The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?
A. Lower than
B. Higher than
C. Same as
D. Not related to
Which of the following is a poisonous fuel gas ?
A. Coke oven gas
B. Blast furnace gas
C. Natural gas
D. None of these
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the_________________?
A. Presence of large quantity of hydrogen in the fuel
B. Low calorific value of the fuel
C. High sulphur content in the fuel
D. Lack of thorough mixing of fuel with air
The main product of high temperature carbonisation of coal is__________________?
A. Coke
B. Ammonia
C. Tar
D. Coke oven gas
Gross heating value of coal is ______________ the net heating value?
A. Higher than
B. Lower than
C. Same as
D. Either A. or B.; depends on the type of coal
Ignition temperature decreases progressively from anthracite to lignite, because___________________?
A. Volatile matter content increases
B. Carbon content decreases
C. Moisture content increases
D. Ash content increases
Which of the following can be made into briquettes without the use of a binder ?
A. Lignite
B. Bituminous coal
C. Anthracite coal
D. None of these
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the____________________?
A. Decolourisation of sugar
B. Solvent recovery from air and gases
C. Absorption of gases and vapor
D. Electrode manufacture
The calorific value is the highest out of the following for__________________?
A. Producer gas
B. Water gas
C. Coke oven gas
D. Blast furnace gas
A fuel with high heat release rate will_________________?
A. Require smaller combustion chamber
B. Have high calorific value
C. Have high adiabatic flame temperature
D. None of these
Recent Comments