FDNY COF P-98 EXAM TEST QUESTIONS AND
ANSWERS VERIFIED 100% CORRECT
1.- *Oil Burner Operation*
What happens when the *oil spray entering a combustion chamber?* - ANSWER- *It
burns in suspension. If any part of the spray mixture contacts the walls of a combustion
chamber, it will cause a smoky fire. Over a period of time carbon deposits may build up
in the combustion chamber and cause a burner failure.*
2.- *Oil Burner Operation*
The *Insulated firebrick?* - ANSWER- *Makes up the walls of a combustion chamber.
Insulated firebrick is lightweight firebrick that becomes cherry red 15 seconds after the
burner starts.*
3.- *Oil Burner Operation*
The *refractory material in a combustion chamber?* - ANSWER- *Should be closed to
the flame and the oil should be burned by the reflected heat. Reflected heat, which
increases combustion efficiency, is heat that is reflected back into the combustion
chamber and maintains the fire after the ignition is turned off.*
4.- *Oil Burner Operation*
The *Diesel generators* ......? - ANSWER- 1.- *Operate differently. They have an
internal combustion engine. Air is compressed by a piston and diesel fuel is injected into
the cylinder. The mixture ignites and turns the engine. Insufficient compression air or a
clogged ignition nozzle will result in improper combustion. The output will be black
smoke and excessive vibration of the engine. Diesel generators should be* tested at
minimum monthly
5.- *Oil Burner Operation*
The *Generators.......* - ANSWER- 2.- *........ are used as an emergency power supply if
the grid fails. They range from 1k VA - 10k VA for small portable diesel generators and
8kVA - 2000k VA for large office complexes, factories and power stations. Diesel
generators also provide back up power to utility grids. Power failures are particularly
critical for hospitals and large offices. Computer service centers have emergency power
generators which are typically powered by diesel fuel and configured to start
automatically, as soon as a power failure occurs. Power generators are selected based
on the load they are intended to supply. Ideally diesel engines should run at least
around 60-75% of their maximum rated load, and at around 75% of their maximum
speed, and* "MUST BE TEST RUN EVERY MONTH TO AVOID DAMAGE" *under
certain conditions that occur when an engine is left idling as a 'standby' generating unit
ready to run up when needed.*
,6.- *Oil Burner Operation*
The *Low Voltage Battery for Generator* - ANSWER-
7.- *Oil Burner Operation*
Fuel-oil *several grades?* - ANSWER- *#1 fuel-oil, to diesel oil or #2 fuel-oil; to the
heavier #4, #5, and #6 fuel-oils. Strainers and or filter are required in the oil line to
separate dirt and sediment. The grade of fuel-oil used in a burner shall be that for which
the burner is approved and as stipulated by the burner manufacturer. Oil containing
gasoline shall not be used. Waste crankcase oil shall not be used, except when such
waste oil is mixed with #6 fuel-oil in bulk or waste oil recovery plants.*
8.- *Oil Burner Operation*
The resultant mixture meets the *minimum specifications for #6 fuel-oil set forth in the
NYC Building Code...,* - ANSWER- and the use of such waste oil complies with all
laws, rules and regulations relating to smoke and other emissions and is approved by:
*NYC Department of Environmental Protection*
*NYC Department of Buildings* and
*FDNY* Is required before changing any grade of fuel-oil.
9.- *Oil Burner Controls*
The *Oil storage tank* - ANSWER- 01.- *The fuel-oil is stored in the oil storage tank.*
60.- *Oil Burner Controls*
The *tank shut-off valve* - ANSWER- 02.- *......... permits the operator to stop the flow
of oil to clean the strainer and to perform other maintenance*
11.- *Oil Burner Controls*
The *Oil filter/strainer* - ANSWER- 03.- *.......... separates dirt and sediment from the
fuel-oil coming from the storage tank*
12.- *Oil Burner Controls*
The *Vacuum Gauge* - ANSWER- 04.- *........ Is used to indicate to the operator
whether there is an obstruction in the suction line* (e.g., the oil filter/strainer is dirty and
requires cleaning)
13.- *Oil Burner Controls*
The *Main fuel valve* - ANSWER- 05.- "............ Is an electrically operated valve" *that
will open or close the line leading to the atomizer of the oil burner. An oil burner is
activated by the primary control. The burner shut-off valve is located as close as
possible to the burner to reduce the amount of oil remaining in the burner line after an
emergency shutdown.*
, 14.- *Oil Burner Controls*
The *Electric ignition* - ANSWER- 06.- *The mixture of fuel-oil and air is ignited at first
by* "ELECTRIC IGNITION". *After ignition, combustion is maintained by retained heat in
the combustion chamber.*
15.- *Oil Burner Controls*
The *Detection Controls* - ANSWER- 07.- *A photoelectric cell is a flame*
"DETECTION CONTROL". *It is a device that will shut down an oil burner if a flame is
not visible to the scanner or photoelectric cell. A dangerous condition will arise if oil is
pumped into the combustion chamber, but not burned. Atomized, un-burned fuel could
cause an explosion if a spark or other source of ignition occurs.*
16.- *Oil Burner Controls*
The *Aquastat* - ANSWER- 08.- *An aquastat operates the oil burner in the summer for
domestic hot water needs*
17.- *Oil Burner Controls*
The *Low water cut-off......* - ANSWER- 09.- *.......... Is an automatic electric control that
will shut the burner off when the water level is below a safe operating point. A shortage
of water in the steam boiler could lead to a dangerous condition.*
18.- *Oil Burner Controls*
The *Gauge glass.......* - ANSWER- 10.- *.......... Is a device used to indicate the water
level of a steam boiler. It is the most important control on the steam boiler. Gauge glass
should have water visible when the boiler is in operation.*
19.- *Oil Burner Controls*
The *Main combustion controller.* - ANSWER- 11. *A primary relay control is the "main
combustion controller". A primary relay control will shut down when no flame is
detected. A spark could cause an explosion in the combustion chamber.*
20.- *Oil Burner Controls*
The *Smoke alarm........* - ANSWER- 12. *....... Is a device mounted on the smoke stack
or chimney only if the maximum fire rate is 20 gallons per hour or over. A smoke alarm
will shut down an oil burner, and put on an alarm if there is excessive smoke or if the
fire is improper. A dangerous condition would exist if all the oil was not being burned or
properly atomized, or too much oil was admitted to the combustion chamber. If the
condition is not corrected, an explosion may occur. The smoke alarm is also a required
combustion and air pollution control.*
71.- *Oil Burner Controls*
The *Steam pressure gauge......* - ANSWER- 13. *......... Shows the steam pressure
inside the steam boiler. The pressure gauge reads in psi (pounds per square inch). It is
ANSWERS VERIFIED 100% CORRECT
1.- *Oil Burner Operation*
What happens when the *oil spray entering a combustion chamber?* - ANSWER- *It
burns in suspension. If any part of the spray mixture contacts the walls of a combustion
chamber, it will cause a smoky fire. Over a period of time carbon deposits may build up
in the combustion chamber and cause a burner failure.*
2.- *Oil Burner Operation*
The *Insulated firebrick?* - ANSWER- *Makes up the walls of a combustion chamber.
Insulated firebrick is lightweight firebrick that becomes cherry red 15 seconds after the
burner starts.*
3.- *Oil Burner Operation*
The *refractory material in a combustion chamber?* - ANSWER- *Should be closed to
the flame and the oil should be burned by the reflected heat. Reflected heat, which
increases combustion efficiency, is heat that is reflected back into the combustion
chamber and maintains the fire after the ignition is turned off.*
4.- *Oil Burner Operation*
The *Diesel generators* ......? - ANSWER- 1.- *Operate differently. They have an
internal combustion engine. Air is compressed by a piston and diesel fuel is injected into
the cylinder. The mixture ignites and turns the engine. Insufficient compression air or a
clogged ignition nozzle will result in improper combustion. The output will be black
smoke and excessive vibration of the engine. Diesel generators should be* tested at
minimum monthly
5.- *Oil Burner Operation*
The *Generators.......* - ANSWER- 2.- *........ are used as an emergency power supply if
the grid fails. They range from 1k VA - 10k VA for small portable diesel generators and
8kVA - 2000k VA for large office complexes, factories and power stations. Diesel
generators also provide back up power to utility grids. Power failures are particularly
critical for hospitals and large offices. Computer service centers have emergency power
generators which are typically powered by diesel fuel and configured to start
automatically, as soon as a power failure occurs. Power generators are selected based
on the load they are intended to supply. Ideally diesel engines should run at least
around 60-75% of their maximum rated load, and at around 75% of their maximum
speed, and* "MUST BE TEST RUN EVERY MONTH TO AVOID DAMAGE" *under
certain conditions that occur when an engine is left idling as a 'standby' generating unit
ready to run up when needed.*
,6.- *Oil Burner Operation*
The *Low Voltage Battery for Generator* - ANSWER-
7.- *Oil Burner Operation*
Fuel-oil *several grades?* - ANSWER- *#1 fuel-oil, to diesel oil or #2 fuel-oil; to the
heavier #4, #5, and #6 fuel-oils. Strainers and or filter are required in the oil line to
separate dirt and sediment. The grade of fuel-oil used in a burner shall be that for which
the burner is approved and as stipulated by the burner manufacturer. Oil containing
gasoline shall not be used. Waste crankcase oil shall not be used, except when such
waste oil is mixed with #6 fuel-oil in bulk or waste oil recovery plants.*
8.- *Oil Burner Operation*
The resultant mixture meets the *minimum specifications for #6 fuel-oil set forth in the
NYC Building Code...,* - ANSWER- and the use of such waste oil complies with all
laws, rules and regulations relating to smoke and other emissions and is approved by:
*NYC Department of Environmental Protection*
*NYC Department of Buildings* and
*FDNY* Is required before changing any grade of fuel-oil.
9.- *Oil Burner Controls*
The *Oil storage tank* - ANSWER- 01.- *The fuel-oil is stored in the oil storage tank.*
60.- *Oil Burner Controls*
The *tank shut-off valve* - ANSWER- 02.- *......... permits the operator to stop the flow
of oil to clean the strainer and to perform other maintenance*
11.- *Oil Burner Controls*
The *Oil filter/strainer* - ANSWER- 03.- *.......... separates dirt and sediment from the
fuel-oil coming from the storage tank*
12.- *Oil Burner Controls*
The *Vacuum Gauge* - ANSWER- 04.- *........ Is used to indicate to the operator
whether there is an obstruction in the suction line* (e.g., the oil filter/strainer is dirty and
requires cleaning)
13.- *Oil Burner Controls*
The *Main fuel valve* - ANSWER- 05.- "............ Is an electrically operated valve" *that
will open or close the line leading to the atomizer of the oil burner. An oil burner is
activated by the primary control. The burner shut-off valve is located as close as
possible to the burner to reduce the amount of oil remaining in the burner line after an
emergency shutdown.*
, 14.- *Oil Burner Controls*
The *Electric ignition* - ANSWER- 06.- *The mixture of fuel-oil and air is ignited at first
by* "ELECTRIC IGNITION". *After ignition, combustion is maintained by retained heat in
the combustion chamber.*
15.- *Oil Burner Controls*
The *Detection Controls* - ANSWER- 07.- *A photoelectric cell is a flame*
"DETECTION CONTROL". *It is a device that will shut down an oil burner if a flame is
not visible to the scanner or photoelectric cell. A dangerous condition will arise if oil is
pumped into the combustion chamber, but not burned. Atomized, un-burned fuel could
cause an explosion if a spark or other source of ignition occurs.*
16.- *Oil Burner Controls*
The *Aquastat* - ANSWER- 08.- *An aquastat operates the oil burner in the summer for
domestic hot water needs*
17.- *Oil Burner Controls*
The *Low water cut-off......* - ANSWER- 09.- *.......... Is an automatic electric control that
will shut the burner off when the water level is below a safe operating point. A shortage
of water in the steam boiler could lead to a dangerous condition.*
18.- *Oil Burner Controls*
The *Gauge glass.......* - ANSWER- 10.- *.......... Is a device used to indicate the water
level of a steam boiler. It is the most important control on the steam boiler. Gauge glass
should have water visible when the boiler is in operation.*
19.- *Oil Burner Controls*
The *Main combustion controller.* - ANSWER- 11. *A primary relay control is the "main
combustion controller". A primary relay control will shut down when no flame is
detected. A spark could cause an explosion in the combustion chamber.*
20.- *Oil Burner Controls*
The *Smoke alarm........* - ANSWER- 12. *....... Is a device mounted on the smoke stack
or chimney only if the maximum fire rate is 20 gallons per hour or over. A smoke alarm
will shut down an oil burner, and put on an alarm if there is excessive smoke or if the
fire is improper. A dangerous condition would exist if all the oil was not being burned or
properly atomized, or too much oil was admitted to the combustion chamber. If the
condition is not corrected, an explosion may occur. The smoke alarm is also a required
combustion and air pollution control.*
71.- *Oil Burner Controls*
The *Steam pressure gauge......* - ANSWER- 13. *......... Shows the steam pressure
inside the steam boiler. The pressure gauge reads in psi (pounds per square inch). It is
