OIL BURNERS EXAMPREP QUESTIONS AND
DETAILED SOLUTIONS
◉ What is a good CO2 reading in a boiler with a retention head
burner?
Answer: 10-12% (11%)
◉ A draft of -.03 to -.04"wc over the fire, and -.01 to -.02"wc at the
breach is considered good.
Answer: False: over the fire draft -.01"wc to -.02"wc, at the breach -
.04"wc
◉ Draft measurements are taken in...
Answer: inches of water column
◉ What will happen if a power vent fails to start or shuts down
during operation?
Answer: Burner will lock out
◉ What are the proper draft settings over the fire and at the breach
respectively?
Answer: -.02 and -.04"wc
,◉ Per code, what three things are needed along with a power
venter?
Answer: proving switch, damper, post purge
◉ How far off the ground should a power venter terminal be?
(minimum distance)
Answer: 1 foot
◉ How far horizontally from a door or window should a power
venter terminal be? (minimum distance)
Answer: 4 feet
◉ Name two types of natural draft.
Answer: thermal, currential
◉ What determines the nozzle angle used?
Answer: burner air pattern, chamber size and shape
◉ What is the position of the blast tube in the chamber?
Answer: 1/4" behind chamber face
,◉ How must the blast tube be pitched?
Answer: down towards the chamber
◉ Describe the path of the oil through the nozzle.
Answer: in filter, through body slots, through tangential slots, into
swirl chamber, out the orifice
◉ What can cause a smoky fire?
Answer: bad oil pressure, insufficient intake air, cold oil
◉ T/F Long narrow chambers usually require 80 and 90 degree
nozzles.
Answer: False
◉ At what pressure is the GPH rating of a nozzle calibrated?
Answer: 100 psi
◉ What are the functions of a combustion chamber?
Answer: achieve highest efficiency
◉ When would you change the internal parts of a nozzle?
Answer: never
, ◉ T/F A typical residential burner can also run on kerosene.
Answer: True
◉ What do you do when you find a chamber that is fully oil
saturated?
Answer: replace it
◉ What is a key factor for complete combustion?
Answer: atomization
◉ T/F A nozzle meters, patterns, and atomizes the oil.
Answer: True
◉ How do you clean a nozzle?
Answer: Do not clean, replace with a new one
◉ What information is stamped on a nozzle?
Answer: GPH, Pattern, Spray angle
◉ What is the required floor space for a chamber with a burner
firing at up to 3GPH?
DETAILED SOLUTIONS
◉ What is a good CO2 reading in a boiler with a retention head
burner?
Answer: 10-12% (11%)
◉ A draft of -.03 to -.04"wc over the fire, and -.01 to -.02"wc at the
breach is considered good.
Answer: False: over the fire draft -.01"wc to -.02"wc, at the breach -
.04"wc
◉ Draft measurements are taken in...
Answer: inches of water column
◉ What will happen if a power vent fails to start or shuts down
during operation?
Answer: Burner will lock out
◉ What are the proper draft settings over the fire and at the breach
respectively?
Answer: -.02 and -.04"wc
,◉ Per code, what three things are needed along with a power
venter?
Answer: proving switch, damper, post purge
◉ How far off the ground should a power venter terminal be?
(minimum distance)
Answer: 1 foot
◉ How far horizontally from a door or window should a power
venter terminal be? (minimum distance)
Answer: 4 feet
◉ Name two types of natural draft.
Answer: thermal, currential
◉ What determines the nozzle angle used?
Answer: burner air pattern, chamber size and shape
◉ What is the position of the blast tube in the chamber?
Answer: 1/4" behind chamber face
,◉ How must the blast tube be pitched?
Answer: down towards the chamber
◉ Describe the path of the oil through the nozzle.
Answer: in filter, through body slots, through tangential slots, into
swirl chamber, out the orifice
◉ What can cause a smoky fire?
Answer: bad oil pressure, insufficient intake air, cold oil
◉ T/F Long narrow chambers usually require 80 and 90 degree
nozzles.
Answer: False
◉ At what pressure is the GPH rating of a nozzle calibrated?
Answer: 100 psi
◉ What are the functions of a combustion chamber?
Answer: achieve highest efficiency
◉ When would you change the internal parts of a nozzle?
Answer: never
, ◉ T/F A typical residential burner can also run on kerosene.
Answer: True
◉ What do you do when you find a chamber that is fully oil
saturated?
Answer: replace it
◉ What is a key factor for complete combustion?
Answer: atomization
◉ T/F A nozzle meters, patterns, and atomizes the oil.
Answer: True
◉ How do you clean a nozzle?
Answer: Do not clean, replace with a new one
◉ What information is stamped on a nozzle?
Answer: GPH, Pattern, Spray angle
◉ What is the required floor space for a chamber with a burner
firing at up to 3GPH?
