1|Page
hvacr gas heating esco Exam Most Recent Exam 2026
Actual Complete Real Verified Exam Questions And
Verified Answers | 100% Correct Answers | Already
Graded A+|| Newest Exam!!!
If a fan motor is disconnected and an ohm meter is a place
to cross the low speed and the motor casing. The meter
should read. - Answer-Open line
On an emergency Saturday service call a customers
furnace lights but it turns off after a short time without the
blower fan running you find that the heat should be
running with the blower fan on low speed but the low
speed winding is open. What should you do? - Answer-
Connect the heat to the medium speed to keep the
furnace working through the weekend and schedule a time
on Monday to return with a new blower motor
Flashback describes - Answer-The flames moving from
the burner outlets, upstream of the gas flow, to burn at the
office.
Flashback is a symptom of - Answer-Gas velocity, which is
slower than the rate of the flame advancing
,2|Page
When a residential furnace experiences flashback, it is
typically caused by - Answer-Low gas pressure at the
manifold
An ignition module is installed on a rooftop unit. Because it
is exposed to weather, the pilot on the unit sometimes
blows out. The unit must be available to heat, as the
building has plumbing that could freeze if heating fails
overnight while it's unoccupied. What type of ignition
module is to be installed here? - Answer-None 100% shut
off
The responsibility for PPE - Answer-Is for the employer to
provide it and for the employee to use it
PPE stands for - Answer-personal protective equipment
When leaning a ladder against the building to access the
roof, how high must the ladder extend? - Answer-At least 3
feet above roof level
The formula SensibleHeatOutput(BTU/h)/1.08x
deltaT(degreesF) gives which unit - Answer-CFM
, 3|Page
The heat output of a furnace is often listed on the data
plate, but it can also be found - Answer-By multiplying the
furnace, efficiency by the input BTU/h rating
How much open space is required in front of the furnace
for service access - Answer-24 inches
One cubic foot of natural gas releases, how much energy
when burned? - Answer-1000 BTU
What voltage is at the output of a spark igniter - Answer-
10,000 V
If an ohmmeter is placed across the high-speed input in
the common of a fan motor, the meter should read -
Answer-A small resistance
If an ignition system is 100% shut off then when it senses
flame failure, gas flow is shut off to both the - Answer-
Burner and pilot
hvacr gas heating esco Exam Most Recent Exam 2026
Actual Complete Real Verified Exam Questions And
Verified Answers | 100% Correct Answers | Already
Graded A+|| Newest Exam!!!
If a fan motor is disconnected and an ohm meter is a place
to cross the low speed and the motor casing. The meter
should read. - Answer-Open line
On an emergency Saturday service call a customers
furnace lights but it turns off after a short time without the
blower fan running you find that the heat should be
running with the blower fan on low speed but the low
speed winding is open. What should you do? - Answer-
Connect the heat to the medium speed to keep the
furnace working through the weekend and schedule a time
on Monday to return with a new blower motor
Flashback describes - Answer-The flames moving from
the burner outlets, upstream of the gas flow, to burn at the
office.
Flashback is a symptom of - Answer-Gas velocity, which is
slower than the rate of the flame advancing
,2|Page
When a residential furnace experiences flashback, it is
typically caused by - Answer-Low gas pressure at the
manifold
An ignition module is installed on a rooftop unit. Because it
is exposed to weather, the pilot on the unit sometimes
blows out. The unit must be available to heat, as the
building has plumbing that could freeze if heating fails
overnight while it's unoccupied. What type of ignition
module is to be installed here? - Answer-None 100% shut
off
The responsibility for PPE - Answer-Is for the employer to
provide it and for the employee to use it
PPE stands for - Answer-personal protective equipment
When leaning a ladder against the building to access the
roof, how high must the ladder extend? - Answer-At least 3
feet above roof level
The formula SensibleHeatOutput(BTU/h)/1.08x
deltaT(degreesF) gives which unit - Answer-CFM
, 3|Page
The heat output of a furnace is often listed on the data
plate, but it can also be found - Answer-By multiplying the
furnace, efficiency by the input BTU/h rating
How much open space is required in front of the furnace
for service access - Answer-24 inches
One cubic foot of natural gas releases, how much energy
when burned? - Answer-1000 BTU
What voltage is at the output of a spark igniter - Answer-
10,000 V
If an ohmmeter is placed across the high-speed input in
the common of a fan motor, the meter should read -
Answer-A small resistance
If an ignition system is 100% shut off then when it senses
flame failure, gas flow is shut off to both the - Answer-
Burner and pilot
