NATE Gas and Oil Heating
None correct answers What precautions are required when mounting any
gasafurnace
on wood platform in an
attic?
14 inWC correct answers The gas control valve may be damaged if exposed
to an inlet
pressure
above...
As few as possible to reduce resistance of flue gases correct answers
How many
elbows should a vent connector
have?
Under no conditions may you use the water heater exhaust vent correct
answers The
technician is installing a vent system for a condensing gas furnace. The
furnace is
several feet from a gas water heater. What conditions, if any, may the
technician route
By using the specific manufacturers termination kit or make one to
the exhaust of the furnace into the exhaust vent of the
meet
water their
requirements
heater? correct answers How may a technician terminate the intake
andproper
for exhaust operation of a high efficiency gas furnace when using
scheduled 40 PVC
pipe
?
Supported with a minimum strap width of 1/2" correct answers When
suspended
metal strapwith
and no saddle, flexible duct
should be...
Adequate space should be allowed for addition of a coil in the future
when feasible
correct answers A technician is installing a gas furnace and the customer
has to
not decided
install an air conditioner. Making this decision, what effect will it
have on theof the supply
installation
ductwork?
Critical correct answers Leveling of a mercury
bulb is...
Discharge moisture into the supply duct correct answers Spray-type
humidifiers are installed
atomizing
to...
Only operate any time the EAC On-Off switch is turned ON correct answers
Electronic
Air Cleaners (EAC) installed in a gas furnace system should be wired
so they...
10-11 inWC correct answers What is commonly the LP gas manifold
pressure?
The ignition control may not prove flame correct answers Why is the
polarity
gas of a equipped
furnace 120v with electronic flame rectification
important?
, By measuring with the furnace operating, and then with the furnace
not operating
correct answers Using a voltmeter, how may a technician determine
voltage drop at a
gas
furnace?
Change the motor tap connection correct answers What may a technician do
to change
the setting on a 4 speed PSC blower
motor?
The capacity of the system varies too much with outdoor temperature
correctstarting
When answers up a dual system, the temperature rise method for
determining
cannot airflow
be used with compressor cycle of the heat
pump. Why?
A hard and forceful flame with a light blue appearance and little to no
yellow correct
answers What is the flame pattern that a technician would expect to see on
a properly single stage gas furnace equipped with "in-shot"
operating
type burner?
Pressurization leak test of a fuel gas pipe correct answers
Compressed
recommended airfor
is
a...
Measuring air pressure correct answers What is a diaphragm type
differential
gauge usedpressure
for?
Inches of Water Column correct answers What is the pressure reading on a
manometer
read
in?
1323 correct answers A technician measures the return air temperature of
a 100,000
BTU output gas furnace to be 65°F and the supply side air temperature to
be 135°F.
What would the CFM
be?
Increased temperature rise correct answers What can a dirty or clogged
filter in angas furnace
operating
cause?
Loss in airflow, excessive blower motor wear, and increased noise
correct
What answers
can bent vanes on a direct drive blower wheel in a gas
furnace cause?
By stealing combustion air preventing complete fuel burning correct
answers
a How dryer
gas clothes can interfere with the operation of a nearby natural gas
furnace with an
atmospheric
burner?
Ductwork should always be checked for leaks and damage correct
answers During
preventative a
maintenance check of a gas
furnace...
Check with the owner of the equipment for their opinion of performance,
Turnatthe
off theunit
thermostat, Turn the FAN switch ON and that the blower is
running correct
answers What should a technician do when performing a cycle check
during a
preventative maintenance
call?
None correct answers What precautions are required when mounting any
gasafurnace
on wood platform in an
attic?
14 inWC correct answers The gas control valve may be damaged if exposed
to an inlet
pressure
above...
As few as possible to reduce resistance of flue gases correct answers
How many
elbows should a vent connector
have?
Under no conditions may you use the water heater exhaust vent correct
answers The
technician is installing a vent system for a condensing gas furnace. The
furnace is
several feet from a gas water heater. What conditions, if any, may the
technician route
By using the specific manufacturers termination kit or make one to
the exhaust of the furnace into the exhaust vent of the
meet
water their
requirements
heater? correct answers How may a technician terminate the intake
andproper
for exhaust operation of a high efficiency gas furnace when using
scheduled 40 PVC
pipe
?
Supported with a minimum strap width of 1/2" correct answers When
suspended
metal strapwith
and no saddle, flexible duct
should be...
Adequate space should be allowed for addition of a coil in the future
when feasible
correct answers A technician is installing a gas furnace and the customer
has to
not decided
install an air conditioner. Making this decision, what effect will it
have on theof the supply
installation
ductwork?
Critical correct answers Leveling of a mercury
bulb is...
Discharge moisture into the supply duct correct answers Spray-type
humidifiers are installed
atomizing
to...
Only operate any time the EAC On-Off switch is turned ON correct answers
Electronic
Air Cleaners (EAC) installed in a gas furnace system should be wired
so they...
10-11 inWC correct answers What is commonly the LP gas manifold
pressure?
The ignition control may not prove flame correct answers Why is the
polarity
gas of a equipped
furnace 120v with electronic flame rectification
important?
, By measuring with the furnace operating, and then with the furnace
not operating
correct answers Using a voltmeter, how may a technician determine
voltage drop at a
gas
furnace?
Change the motor tap connection correct answers What may a technician do
to change
the setting on a 4 speed PSC blower
motor?
The capacity of the system varies too much with outdoor temperature
correctstarting
When answers up a dual system, the temperature rise method for
determining
cannot airflow
be used with compressor cycle of the heat
pump. Why?
A hard and forceful flame with a light blue appearance and little to no
yellow correct
answers What is the flame pattern that a technician would expect to see on
a properly single stage gas furnace equipped with "in-shot"
operating
type burner?
Pressurization leak test of a fuel gas pipe correct answers
Compressed
recommended airfor
is
a...
Measuring air pressure correct answers What is a diaphragm type
differential
gauge usedpressure
for?
Inches of Water Column correct answers What is the pressure reading on a
manometer
read
in?
1323 correct answers A technician measures the return air temperature of
a 100,000
BTU output gas furnace to be 65°F and the supply side air temperature to
be 135°F.
What would the CFM
be?
Increased temperature rise correct answers What can a dirty or clogged
filter in angas furnace
operating
cause?
Loss in airflow, excessive blower motor wear, and increased noise
correct
What answers
can bent vanes on a direct drive blower wheel in a gas
furnace cause?
By stealing combustion air preventing complete fuel burning correct
answers
a How dryer
gas clothes can interfere with the operation of a nearby natural gas
furnace with an
atmospheric
burner?
Ductwork should always be checked for leaks and damage correct
answers During
preventative a
maintenance check of a gas
furnace...
Check with the owner of the equipment for their opinion of performance,
Turnatthe
off theunit
thermostat, Turn the FAN switch ON and that the blower is
running correct
answers What should a technician do when performing a cycle check
during a
preventative maintenance
call?
