1|Page
Oil Heat Exam Newest 2025 featuring 300
accurate and verified questions covering oil
burner operation, fuel systems, combustion
principles, safety standards, maintenance
procedures, and troubleshooting techniques.
Regarding heat pumps, suction line accumulators are
used as what for excess refrigerant - .....ANSWER
...✔✔ receivers
a gas meter must be located how many feet from the
suction line - .....ANSWER ...✔✔ 3
what reduces the capacity of a refrigerant compressor -
.....ANSWER ...✔✔ compressor unloader
regarding gas heating, for combustion to take place
with natural gas, the mixture must be from 4% to 14%
gas and 96% to 86% air. An amount of gas less than
_______ would be too lean - .....ANSWER ...✔✔ 4%
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what should the draft reading over the fire be for flame
retention, residential oil burner - .....ANSWER ...✔✔
negative .02
what valve is set at the adjustable heat anticipator on a
gas thermostat - .....ANSWER ...✔✔ the amp flow
reading of the control circuit
which is not true of a water cooled chiller system -
.....ANSWER ...✔✔ mostly used in residential systems
a puff back that is caused by an accumulation of air-oil
mixture in the combustion chamber that is ignited either
a late spark or the hot refractory material - .....ANSWER
...✔✔ explosion
the voltage to a residential thermostat - .....ANSWER
...✔✔ 24
how far from a fuel oil burner must an electrode panel
be - .....ANSWER ...✔✔ 3'
regarding heat pumps, two ______ devices are used -
.....ANSWER ...✔✔ expansion
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a ____ is a rigid connection that holds one scaffold
member in a fixed position with respect to another
member, or building structure - .....ANSWER ...✔✔
brace
on a 208 volt meter the lowest allowable input voltage
is - .....ANSWER ...✔✔ 187.2
what pressure is liquified petrolium gas fed to the
burner - .....ANSWER ...✔✔ 11" Wc
in reference to cooling tower sump water, what is the
ideal temp to test PH - .....ANSWER ...✔✔ 70-80 F
unloaders are used to balance the ______ on a run
cycle - .....ANSWER ...✔✔ load
T or F Copper water tube hydronic boilers has the
lowest terminal mass per btu/hr - .....ANSWER ...✔✔
true
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what is the max distance an ultraviolet scanner may be
placed from the flame - .....ANSWER ...✔✔ 18 inches
what is the net free air in square inches of a 12" x 12"
metal louver opening. (formula = total area x 75%) -
.....ANSWER ...✔✔ 108
hot gas bypass is used to _____ an evaporator coil -
.....ANSWER ...✔✔ defrost
what is an A type vent made of - .....ANSWER ...✔✔
masonry
in a cascade refrigerating system two or more
refrigerating systems are connected. One evaporator
coil cools the next _____ - .....ANSWER ...✔✔
condenser
modern day residential oil burner motors operate at
how many rpms - .....ANSWER ...✔✔ 3450
hard drawn copper tubing should not be - .....ANSWER
...✔✔ bent
Oil Heat Exam Newest 2025 featuring 300
accurate and verified questions covering oil
burner operation, fuel systems, combustion
principles, safety standards, maintenance
procedures, and troubleshooting techniques.
Regarding heat pumps, suction line accumulators are
used as what for excess refrigerant - .....ANSWER
...✔✔ receivers
a gas meter must be located how many feet from the
suction line - .....ANSWER ...✔✔ 3
what reduces the capacity of a refrigerant compressor -
.....ANSWER ...✔✔ compressor unloader
regarding gas heating, for combustion to take place
with natural gas, the mixture must be from 4% to 14%
gas and 96% to 86% air. An amount of gas less than
_______ would be too lean - .....ANSWER ...✔✔ 4%
,2|Page
what should the draft reading over the fire be for flame
retention, residential oil burner - .....ANSWER ...✔✔
negative .02
what valve is set at the adjustable heat anticipator on a
gas thermostat - .....ANSWER ...✔✔ the amp flow
reading of the control circuit
which is not true of a water cooled chiller system -
.....ANSWER ...✔✔ mostly used in residential systems
a puff back that is caused by an accumulation of air-oil
mixture in the combustion chamber that is ignited either
a late spark or the hot refractory material - .....ANSWER
...✔✔ explosion
the voltage to a residential thermostat - .....ANSWER
...✔✔ 24
how far from a fuel oil burner must an electrode panel
be - .....ANSWER ...✔✔ 3'
regarding heat pumps, two ______ devices are used -
.....ANSWER ...✔✔ expansion
,3|Page
a ____ is a rigid connection that holds one scaffold
member in a fixed position with respect to another
member, or building structure - .....ANSWER ...✔✔
brace
on a 208 volt meter the lowest allowable input voltage
is - .....ANSWER ...✔✔ 187.2
what pressure is liquified petrolium gas fed to the
burner - .....ANSWER ...✔✔ 11" Wc
in reference to cooling tower sump water, what is the
ideal temp to test PH - .....ANSWER ...✔✔ 70-80 F
unloaders are used to balance the ______ on a run
cycle - .....ANSWER ...✔✔ load
T or F Copper water tube hydronic boilers has the
lowest terminal mass per btu/hr - .....ANSWER ...✔✔
true
, 4|Page
what is the max distance an ultraviolet scanner may be
placed from the flame - .....ANSWER ...✔✔ 18 inches
what is the net free air in square inches of a 12" x 12"
metal louver opening. (formula = total area x 75%) -
.....ANSWER ...✔✔ 108
hot gas bypass is used to _____ an evaporator coil -
.....ANSWER ...✔✔ defrost
what is an A type vent made of - .....ANSWER ...✔✔
masonry
in a cascade refrigerating system two or more
refrigerating systems are connected. One evaporator
coil cools the next _____ - .....ANSWER ...✔✔
condenser
modern day residential oil burner motors operate at
how many rpms - .....ANSWER ...✔✔ 3450
hard drawn copper tubing should not be - .....ANSWER
...✔✔ bent
