TEST OIL BURNER LICENSE PREP
2026 2027 LOCAL 537 WITH 115
QUESTIONS AND CORRECT
ANSWERS RATED A+
What is the best way to blow out an oil supply line?
Hand pump (safest way)
What is the primary voltage of an ignition transformer?
120v
What is the maximum voltage to ground?
150v
Is steam pressure over 15psi high pressure
Yes
What is the secondary voltage on an ignition transformer
10,000v for an iron clad (electronic is 10k to 14k volts)
Thermal valve melts at what temperature?
165°F
Where are the thermal valves required?
2 are required, one at the tank outlet and one at the pump inlet. (A thermal valve is
a spring loaded valve with a melt able solder)
If you have a residential oil burner that blows a 15 amp fuse what should you do?
Use an amp probe
Who approves oil burner installations?
Local Fire department
What is the largest oil tank that can be exposed?
, 660 gal
What is the minimum vent and fill size for a 660 gal tank?
1 1/4
To avoid condensation in flue pipe on an oil fired appliance, what should the
minimum gross stack temp be?
350°F (stack-primary air = net stack)
What does a OSV do?
Prevents oil leaks on and underground tank. (OSV - oil safety valve. Opens with a
vacuum)
How many thermal valves are required on a new install?
2
What is the only test that can be performed in the field?
Combustion analysis
Fuel pressure is set at what psi?
100psi
Are test wells allowed on underground tanks?
No
What is the maximum safety timing on a switch?
45sec (new code states 15 sec)
What are the two major components of a fuel?
Hydrogen (85%) and carbon (15%)
Which way should you pitch the flue?
1/4" towards the outlet of the boiler (1/4 per 10')
Is a one pipe system should the bypass plug be installed?
No
What is oil flow measured in?
2026 2027 LOCAL 537 WITH 115
QUESTIONS AND CORRECT
ANSWERS RATED A+
What is the best way to blow out an oil supply line?
Hand pump (safest way)
What is the primary voltage of an ignition transformer?
120v
What is the maximum voltage to ground?
150v
Is steam pressure over 15psi high pressure
Yes
What is the secondary voltage on an ignition transformer
10,000v for an iron clad (electronic is 10k to 14k volts)
Thermal valve melts at what temperature?
165°F
Where are the thermal valves required?
2 are required, one at the tank outlet and one at the pump inlet. (A thermal valve is
a spring loaded valve with a melt able solder)
If you have a residential oil burner that blows a 15 amp fuse what should you do?
Use an amp probe
Who approves oil burner installations?
Local Fire department
What is the largest oil tank that can be exposed?
, 660 gal
What is the minimum vent and fill size for a 660 gal tank?
1 1/4
To avoid condensation in flue pipe on an oil fired appliance, what should the
minimum gross stack temp be?
350°F (stack-primary air = net stack)
What does a OSV do?
Prevents oil leaks on and underground tank. (OSV - oil safety valve. Opens with a
vacuum)
How many thermal valves are required on a new install?
2
What is the only test that can be performed in the field?
Combustion analysis
Fuel pressure is set at what psi?
100psi
Are test wells allowed on underground tanks?
No
What is the maximum safety timing on a switch?
45sec (new code states 15 sec)
What are the two major components of a fuel?
Hydrogen (85%) and carbon (15%)
Which way should you pitch the flue?
1/4" towards the outlet of the boiler (1/4 per 10')
Is a one pipe system should the bypass plug be installed?
No
What is oil flow measured in?
