Key Points Flashcards
Fuel system accessories are used to store, supply and control the fuel supplied to the boiler
True
Fuel oil is a liquid fossil fuel that consists primarily of carbon hydrogen and moisture
True
Fuel oils used in low pressure boilers are no. 2 fuel oil no. 4 fuel oil, no. 5 fuel oil and no. 6 fuel oil.
True
Fuel oil burners atomize fuel oil to increase contact with combustion air for maximum combustion efficiency
True
Natural gas is a colorless and odorless fossil fuel that consist primarily of methane, small amounts of ethylene, and other gases
True
In a low pressure gas system, gas is reduced from supplier gas pressure to approximately 0 psi
True
In a high pressure fas system, gas is supplied through a high pressure gas main at a higher than a residential gas supply line
True
In a high pressure gas burner, gas is supplied and mixed with air inside the burner
True
In a low pressure gas burner air passing through a mixing chamber outside the burner draws gas in from the zero pressure gas chamber
True
Combination burnes can use fuel oil or natural gas
Gas
Coal is a solid black material formed when organic material is hardened in the earth over millions of years
True
Coal used for firing steam boilers is fed using pulverized coal, stokers, or hand firing
True
Stokers are mechanical coal-feeding devices that feed coal into the furnace of the boiler at a consistant rate
True
An underfeed stoker is a coal feeding device that introduces coal from under the fire
True
A screw-fedder stoker is a stoker that uses a low-speed feed screw to advance coal from a hopper to the retort
True
A ram-feed stoker is a stoker that uses a feeder block ram to feed the coal into the retort
True
Combination controls regulate fuel supply, air supply, air to fuel ratio and removal of gases of combustion in a boiler
True
An ON/OFF control system controls the amount os steam produced by starting and stopping the burner
True
An ON/OFF Control system is commonly used for small package boiler and where the steam load allows the burner to start and stop as required
True
A flame safegurd system monitors the burner start-up sequence and the main flame and controls the firing rate during normal operation
True
A flame safeguard programmer sequences burner function for prepurge, ignition trials, run period and postpurge
True
A flame scanner senses if the pilot light and/or main flame are lit
True
Combustion efficiency is the ability of a burner to burn fuel as indicated by amount of unburned fuel and exces air in the gases if combustion
True
Combustion efficiency can be determined by evaluating the flue gas
True
A pollutant is matter that contaminates air soil or water
True
Air pollution regulation are enacted at the federal level or at the state and local level
True
Building automation system monitor boiler operation for safety and afficiency
True
Fuel oil is a liquid fossil fuel that consist primarily of carbon, hydrogen and moisture
True
the temperature at wich a fuel gives off vapor that flashes when expose to an open flame
Flash point
The temperature to which fuel oil must be heated to burn continuesly when expose to an open flame
Fire point
The lowest temperature at which fuel oil flows as a liquid
Pour point
The ability of the fuel to be vaporize
Volatility
Viscosity limits are the specification os viscocity measurements required to properly transport and atomize the fuel
True
The four grades of fuel
#2 #4 #5 #6 Fuel oils
Distillate fuel oil. Low on viscocity
Number 1 and 2 fuel oil
A heavy residual fuel oil
Number 4, 5 and 6 fuel oil
Natural gas is a colorless and odorless fossil fuel that consist primarily os methane, small amounts of ethylene, and other gases
True
In a low pressure gas system, gas is reduced from suplier gas pressure to approximately 0 psi
True
In a high pressure gas system, gas is supplied through a high pressure gas main at a higher pressure than a residential gas supply line
True
In a high pressure gas burner, gas is supplied and mixed with air inside the burner
True
In a low pressure gas burner, air passing through a mixing chamber outside the burner draws gas in from zero pressure gas chamber
True
Combination burners can use fuel oil or natural gas
True
Coal is a solid black fuel formed when organic material is hardened in the earth over millions of years
True
Coal used for firing steam boilers is fed using pulverizes coal, stokers, or hand firing
True
Stokers are mechanical coal-feeding devices that feed coal into the furnace of the boiler in a consistant rate
True
An underfeed stoker is a coal feeding device that introduces coal from under the fire
True
A ram-feed stoker is a stoker that uses a feeder block ram to feed the coal into the retort
True
Combustion control regulates fuel supply, air supply, air-to-fuel ratio, and removal of gases of combustion in a boiler
True
An ON/OFF control system controls the amount os steam produced by starting and stopping the burner
True
An ON/OFF control system is commonly used for small package boilers and where the steam load allows the burner to start and stop as required
True
A flame safeguard system monitors the burner start-up sequence and the main flame and controls the firing rate during normal operation
True
A flame safeguard programmer sequence burner function for prepurg, ignition trials, run period, and postpurge
True
A flame scanner senses if the pilot light and/or main flame are lit
True
Combustion efficiency is the ability of a burner to burn fuelas indicated by the amount of unburned fuel and excess air in the gases of combustion
True
Combustion efficiency can be determined by evaluating the flue gas
True
A pollutant is matter that contaminates air, soil or water
True
Air pollution regulations are enacted at the federal level or at the state and local level
True
Building automation system monitor boiler operation for safety and efficiency
True
