Esco Gas Heating Exam Test Questions and Answers Rated A
Is for the employer to provide it and for the employee to
The responsibility for PPE
use it
PPE stands for personal protective equipment
When leaning a ladder against the building to access the
At least 3 feet above roof level
roof, how high must the ladder extend?
The formula SensibleHeatOutput(BTU/h)/1.08x
CFM
deltaT(degreesF) gives which unit
The heat output of a furnace is often listed on the data By multiplying the furnace, eflciency by the input BTU/h
plate, but it can also be found rating
How much open space is required in front of the furnace
24 inches
for service access
One cubic foot of natural gas releases, how much energy
1000 BTU
when burned?
What voltage is at the output of a spark igniter 10,000 V
If an ohmmeter is placed across the high-speed input in
A small resistance
the common of a fan motor, the meter should read
If a fan motor is disconnected and an ohm meter is a place
to cross the low speed and the motor casing. The meter Open line
should read.
On an emergency Saturday service call a customers fur-
nace lights but it turns ott after a short time without the Connect the heat to the medium speed to keep the furnace
blower fan running you find that the heat should be run- working through the weekend and schedule a time on
ning with the blower fan on low speed but the low speed Monday to return with a new blower motor
winding is open. What should you do?
The flames moving from the burner outlets, upstream of
Flashback describes
the gas flow, to burn at the oflce.
Gas velocity, which is slower than the rate of the flame
Flashback is a symptom of
advancing
1/9
, Esco Gas Heating Exam Test Questions and Answers Rated A
When a residential furnace experiences flashback, it is
Low gas pressure at the manifold
typically caused by
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
None 100% shut ott
building has plumbing that could freeze if heating fails
overnight while it's unoccupied. What type of ignition
module is to be installed here?
If an ignition system is 100% shut ott then when it senses
Burner and pilot
flame failure, gas flow is shut ott to both the
In the past, it was believed that if an LP furnace had a
non-100% shut ott control, the propane would pull near Newer, ignition modules, use soft, lockouts, or continuous
the ignition source, creating an explosive hazard. Why is it retry to repeatedly attempt to relight the pilot without
that LP furnaces are not necessarily required to use 100% creating a continuous buildup of gas
shut ott controls anymore?
Which which must operate before a furnace with a draft
Ditterential air pressure
inducer will ignite
Combustion of one cubic foot of liquefied fuel releases
2500 BTU
approximately how much energy?
The vent stack temperature for a natural draft furnace is
350°F to 450°F
typically
The vent stack temperature for a mid eflciency furnace is
350°F to 450°F
typically
The vent stack temperature for a high eflciency furnace is
110°F to 120°F
typically
That is a double wall flue pipe. What materials are used
The inner wall is aluminum and the outer wall is steel
for the two layers?
Which three things are required for combustion Oxygen, fuel, heat
2/9
Is for the employer to provide it and for the employee to
The responsibility for PPE
use it
PPE stands for personal protective equipment
When leaning a ladder against the building to access the
At least 3 feet above roof level
roof, how high must the ladder extend?
The formula SensibleHeatOutput(BTU/h)/1.08x
CFM
deltaT(degreesF) gives which unit
The heat output of a furnace is often listed on the data By multiplying the furnace, eflciency by the input BTU/h
plate, but it can also be found rating
How much open space is required in front of the furnace
24 inches
for service access
One cubic foot of natural gas releases, how much energy
1000 BTU
when burned?
What voltage is at the output of a spark igniter 10,000 V
If an ohmmeter is placed across the high-speed input in
A small resistance
the common of a fan motor, the meter should read
If a fan motor is disconnected and an ohm meter is a place
to cross the low speed and the motor casing. The meter Open line
should read.
On an emergency Saturday service call a customers fur-
nace lights but it turns ott after a short time without the Connect the heat to the medium speed to keep the furnace
blower fan running you find that the heat should be run- working through the weekend and schedule a time on
ning with the blower fan on low speed but the low speed Monday to return with a new blower motor
winding is open. What should you do?
The flames moving from the burner outlets, upstream of
Flashback describes
the gas flow, to burn at the oflce.
Gas velocity, which is slower than the rate of the flame
Flashback is a symptom of
advancing
1/9
, Esco Gas Heating Exam Test Questions and Answers Rated A
When a residential furnace experiences flashback, it is
Low gas pressure at the manifold
typically caused by
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
None 100% shut ott
building has plumbing that could freeze if heating fails
overnight while it's unoccupied. What type of ignition
module is to be installed here?
If an ignition system is 100% shut ott then when it senses
Burner and pilot
flame failure, gas flow is shut ott to both the
In the past, it was believed that if an LP furnace had a
non-100% shut ott control, the propane would pull near Newer, ignition modules, use soft, lockouts, or continuous
the ignition source, creating an explosive hazard. Why is it retry to repeatedly attempt to relight the pilot without
that LP furnaces are not necessarily required to use 100% creating a continuous buildup of gas
shut ott controls anymore?
Which which must operate before a furnace with a draft
Ditterential air pressure
inducer will ignite
Combustion of one cubic foot of liquefied fuel releases
2500 BTU
approximately how much energy?
The vent stack temperature for a natural draft furnace is
350°F to 450°F
typically
The vent stack temperature for a mid eflciency furnace is
350°F to 450°F
typically
The vent stack temperature for a high eflciency furnace is
110°F to 120°F
typically
That is a double wall flue pipe. What materials are used
The inner wall is aluminum and the outer wall is steel
for the two layers?
Which three things are required for combustion Oxygen, fuel, heat
2/9
