1|Page
NATE GAS & HEAT EXAM PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
What precautions are required when mounting any gas furnace on a wood
platform in an attic?-correct-answer-None
The gas control valve may be damaged if exposed to an inlet pressure above:-
correct-answer-14 in. W.C.
How many elbows and joints should a vent connector have:-correct-answer-As
few as possible to reduce resistance of flue gases
What conditions, if any may a technician route the exhaust of the furnace into the
exhaust vent of the water heater?-correct-answer-Under no conditions may you
use the water heater exhaust vent.
How may a technician terminate the intake and exhaust for proper operation of a
high efficiency gas furnace when using scheduled 40 PVC pipe:-correct-answer-By
using the specific manufacturers termination kit or make one to meet their
requirements.
,2|Page
When suspended with metal strap and no saddle, flexible duct should be:-correct-
answer-Supported with a minimum strap width of 1/2"
Installing a gas furnace and not an air conditioner has what affect on the
installation of the supply ductwork:-correct-answer-Leave adequate space should
be allowed for addition of a coil in the future when feasible
Leveling of a Mercury bulb is:-correct-answer-Critical
Spray-type atomizing humidifiers are installed to:-correct-answer-Discharge
moisture into the supply duct
Electronic air cleaners (EAC) installed in a gas furnace system should be wired so
they:-correct-answer-Only operate any time the EAC On-Off switch is turned to
ON.
The LP gas manifold pressure is commonly:-correct-answer-10 to 11 in. W.C.
, 3|Page
The polarity of a 120V gas furnace equipped with electronic flame rectification is
important because:-correct-answer-The ignition control may not prove flame
Using a voltmeter, a technician can determine voltage drop at a gas furnace:-
correct-answer-With the furnace not operating and then with the furnace
operating.
The setting on a 4 speed PSC blower motor can be changed by changing the:-
correct-answer-Motor tap connection
When starting up a dual system, the temperature rise method for determining
airflow cannot be used with compressor cycle of the heat pump because:-correct-
answer-The capacity of the system varies too much with outdoor temperature.
The flame pattern a technician would expect to see on a properly operating single
stage gas furnace equipped with "in shot" type burner is a:-correct-answer-Hard
and forceful flame with a light blue appearance and little to no yellow
Compressed air is recommended for a:-correct-answer-Pressurization leak test of
fuel gas pipe
NATE GAS & HEAT EXAM PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
What precautions are required when mounting any gas furnace on a wood
platform in an attic?-correct-answer-None
The gas control valve may be damaged if exposed to an inlet pressure above:-
correct-answer-14 in. W.C.
How many elbows and joints should a vent connector have:-correct-answer-As
few as possible to reduce resistance of flue gases
What conditions, if any may a technician route the exhaust of the furnace into the
exhaust vent of the water heater?-correct-answer-Under no conditions may you
use the water heater exhaust vent.
How may a technician terminate the intake and exhaust for proper operation of a
high efficiency gas furnace when using scheduled 40 PVC pipe:-correct-answer-By
using the specific manufacturers termination kit or make one to meet their
requirements.
,2|Page
When suspended with metal strap and no saddle, flexible duct should be:-correct-
answer-Supported with a minimum strap width of 1/2"
Installing a gas furnace and not an air conditioner has what affect on the
installation of the supply ductwork:-correct-answer-Leave adequate space should
be allowed for addition of a coil in the future when feasible
Leveling of a Mercury bulb is:-correct-answer-Critical
Spray-type atomizing humidifiers are installed to:-correct-answer-Discharge
moisture into the supply duct
Electronic air cleaners (EAC) installed in a gas furnace system should be wired so
they:-correct-answer-Only operate any time the EAC On-Off switch is turned to
ON.
The LP gas manifold pressure is commonly:-correct-answer-10 to 11 in. W.C.
, 3|Page
The polarity of a 120V gas furnace equipped with electronic flame rectification is
important because:-correct-answer-The ignition control may not prove flame
Using a voltmeter, a technician can determine voltage drop at a gas furnace:-
correct-answer-With the furnace not operating and then with the furnace
operating.
The setting on a 4 speed PSC blower motor can be changed by changing the:-
correct-answer-Motor tap connection
When starting up a dual system, the temperature rise method for determining
airflow cannot be used with compressor cycle of the heat pump because:-correct-
answer-The capacity of the system varies too much with outdoor temperature.
The flame pattern a technician would expect to see on a properly operating single
stage gas furnace equipped with "in shot" type burner is a:-correct-answer-Hard
and forceful flame with a light blue appearance and little to no yellow
Compressed air is recommended for a:-correct-answer-Pressurization leak test of
fuel gas pipe
