P-99 / LOW PSI OIL BURNER OPERATOR
(ACTUAL 2025/2026) QUESTIONS AND ANSWERS
100% SOLVED
All heating, combustion, and cooking equipment shall be
provided with insulation or the building construction shall be
fire protected, so that during operation the surface of
combustible construction materials will not be raised to a
temperature higher than ____.
170 ̊ F
Between what temperatures must no. 6 fuel-oil be maintained
in the storage tank?
100 ̊ - 130 ̊F
What are the five commercial grade hydrocarbon oils?
(1) No. 1 fuel-oil/range oil.
(2) No. 2 fuel-oil/diesel oil.
(3) No. 4 fuel-oil.
,(4) No. 5 fuel-oil.
(5) No. 6 fuel-oil.
On which side of the shut-off valve shall a relief or pressure
regulating valve be provided?
Heater side.
The heaviest commercial fuel-oil is ____.
No. 6 fuel-oil.
Which fuel-oil contains the most sediment?
No. 6 fuel-oil.
Heavy oil such as no. 6 fuel-oil is raised to about ____ before
it enters the combustion process.
180°F
, A defective oil cut-off valve can lead to ____.
After-drip.
After-drip can lead to ____.
Carbon deposit build-up.
What will dirty or damaged nozzles cause?
Carbon deposit build-up.
How often should no. 6 fuel-oil burner nozzles be cleaned?
Daily.
Blockage in the chimney or flue passage will cause the boiler
room to become ____.
Filled with smoke.
Water in the fuel-oil or the wrong grade of fuel-oil will cause
improper ____.
(ACTUAL 2025/2026) QUESTIONS AND ANSWERS
100% SOLVED
All heating, combustion, and cooking equipment shall be
provided with insulation or the building construction shall be
fire protected, so that during operation the surface of
combustible construction materials will not be raised to a
temperature higher than ____.
170 ̊ F
Between what temperatures must no. 6 fuel-oil be maintained
in the storage tank?
100 ̊ - 130 ̊F
What are the five commercial grade hydrocarbon oils?
(1) No. 1 fuel-oil/range oil.
(2) No. 2 fuel-oil/diesel oil.
(3) No. 4 fuel-oil.
,(4) No. 5 fuel-oil.
(5) No. 6 fuel-oil.
On which side of the shut-off valve shall a relief or pressure
regulating valve be provided?
Heater side.
The heaviest commercial fuel-oil is ____.
No. 6 fuel-oil.
Which fuel-oil contains the most sediment?
No. 6 fuel-oil.
Heavy oil such as no. 6 fuel-oil is raised to about ____ before
it enters the combustion process.
180°F
, A defective oil cut-off valve can lead to ____.
After-drip.
After-drip can lead to ____.
Carbon deposit build-up.
What will dirty or damaged nozzles cause?
Carbon deposit build-up.
How often should no. 6 fuel-oil burner nozzles be cleaned?
Daily.
Blockage in the chimney or flue passage will cause the boiler
room to become ____.
Filled with smoke.
Water in the fuel-oil or the wrong grade of fuel-oil will cause
improper ____.
