Esco gas heating exam questions with correct
answers
The responsibility for PPE - verified answer(s)-✔✔Is for the employer to provide it and for the
employee to use it
PPE stands for - verified answer(s)-✔✔personal protective equipment
When leaning a ladder against the building to access the roof, how high must the ladder
extend? - verified answer(s)-✔✔At least 3 feet above roof level
The formula SensibleHeatOutput(BTU/h)/1.08x deltaT(degreesF) gives which unit - verified
answer(s)-✔✔CFM
The heat output of a furnace is often listed on the data plate, but it can also be found -
verified answer(s)-✔✔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 - verified
answer(s)-✔✔24 inches
One cubic foot of natural gas releases, how much energy when burned? - verified answer(s)-
✔✔1000 BTU
What voltage is at the output of a spark igniter - verified answer(s)-✔✔10,000 V
If an ohmmeter is placed across the high-speed input in the common of a fan motor, the
meter should read - verified answer(s)-✔✔A small resistance
, 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. - verified answer(s)-✔✔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? - verified
answer(s)-✔✔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 - verified answer(s)-✔✔The flames moving from the burner outlets,
upstream of the gas flow, to burn at the office.
Flashback is a symptom of - verified answer(s)-✔✔Gas velocity, which is slower than the rate
of the flame advancing
When a residential furnace experiences flashback, it is typically caused by - verified
answer(s)-✔✔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? - verified answer(s)-✔✔None 100% shut off
If an ignition system is 100% shut off then when it senses flame failure, gas flow is shut off to
both the - verified answer(s)-✔✔Burner and pilot
In the past, it was believed that if an LP furnace had a non-100% shut off control, the propane
would pull near the ignition source, creating an explosive hazard. Why is it that LP furnaces
are not necessarily required to use 100% shut off controls anymore? - verified answer(s)-
answers
The responsibility for PPE - verified answer(s)-✔✔Is for the employer to provide it and for the
employee to use it
PPE stands for - verified answer(s)-✔✔personal protective equipment
When leaning a ladder against the building to access the roof, how high must the ladder
extend? - verified answer(s)-✔✔At least 3 feet above roof level
The formula SensibleHeatOutput(BTU/h)/1.08x deltaT(degreesF) gives which unit - verified
answer(s)-✔✔CFM
The heat output of a furnace is often listed on the data plate, but it can also be found -
verified answer(s)-✔✔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 - verified
answer(s)-✔✔24 inches
One cubic foot of natural gas releases, how much energy when burned? - verified answer(s)-
✔✔1000 BTU
What voltage is at the output of a spark igniter - verified answer(s)-✔✔10,000 V
If an ohmmeter is placed across the high-speed input in the common of a fan motor, the
meter should read - verified answer(s)-✔✔A small resistance
, 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. - verified answer(s)-✔✔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? - verified
answer(s)-✔✔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 - verified answer(s)-✔✔The flames moving from the burner outlets,
upstream of the gas flow, to burn at the office.
Flashback is a symptom of - verified answer(s)-✔✔Gas velocity, which is slower than the rate
of the flame advancing
When a residential furnace experiences flashback, it is typically caused by - verified
answer(s)-✔✔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? - verified answer(s)-✔✔None 100% shut off
If an ignition system is 100% shut off then when it senses flame failure, gas flow is shut off to
both the - verified answer(s)-✔✔Burner and pilot
In the past, it was believed that if an LP furnace had a non-100% shut off control, the propane
would pull near the ignition source, creating an explosive hazard. Why is it that LP furnaces
are not necessarily required to use 100% shut off controls anymore? - verified answer(s)-
