NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
NATE GAS & HEAT NEWEST EXAM / NATE GAS & HEAT
PREPARATION/NATE GAS & HEAT EXAM PRACTICE EXAM WITH
200 QUESTIONS AND CORRECT ANSWERS| BRAND NEW
VERSION!
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
Diaphragm type differential pressure gauge is used to: - Correct Answer-Measure
air pressure
The pressure reading on a manometer is expressed in: - Correct Answer-Inches of
water
A technician measures the return air temperature of a 100,000 BTU output gas
furnace to be 65 degrees and the supply side air temperature is 135 degrees: -
Correct Answer-The CFM would be 1323
1|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
A dirty or clogged air filter in an operating gas furnace can cause an: - Correct
Answer-Increase temperature rise
Bent vanes on a direct drive blower wheel in a gas furnace can cause a: - Correct
Answer-Loss in airflow, excessive blower motor wear, and increase noise
A gas clothes dryer can interfere with the operation of a nearby natural draft gas
furnace with an atmospheric burner by: - Correct Answer-Stealing combustion air
preventing complete fuel burning
During a preventive maintenance check of a gas furnace: - Correct Answer-
Ductwork should always be checked for leaks and damage
When performing a cycle check during a preventive maintenance call, the
technician should: - Correct Answer-First, check with owner for equipment
performance
Next, turn the unit off at the thermostat system switch
Next, set fan switch to ON and check that the blower is running
The measurements required to calculate the CFM of a gas furnace are: - Correct
Answer-Entering air temperature
Leaving air temperature
Outdoor ambient and rated capacity
2|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
The reason for checking the temperature rise across the heat exchanger of a gas
furnace is to: - Correct Answer-Compare temperature differential to nameplate
rating
The technician is servicing a gas furnace located in a basement and the complaint
is "not enough heat". The following conditions exist: Properly sized furnace is
operating correctly; Temperature rise is within specification; Filter is clean and
CFM from blower is running. - Correct Answer-The most likely problem with this
system is the air side is leaking at one or more supply ducts
The technician is checking the operation of an induced draft furnace with an
atmospheric burner and a direct ignition system. On a call for heat the: Vent
blower comes on; Igniter glows; Main burner does not light; - Correct Answer-The
next check would be the gas supply and/or gas valve
The complaint is that there is static electricity throughout the house. The home
has a bypass humidifier. The technician has checked the humidistat and verified
that it is set properly. - Correct Answer-The next check would be to see if the
humidifier damper is open.
A customer complains the unit is "blowing cold air". The technician determines
that the problem occurs at the end of the heating sequence. The furnace used an
electronic integrated blower control. - Correct Answer-The likely problem with the
system is the blower off delay is set too long.
What precautions are required when mounting any gas furnace on a wood
platform in an attic? - Correct Answer-None
3|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
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.
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
4|Page
NATE GAS & HEAT NEWEST EXAM / NATE GAS & HEAT
PREPARATION/NATE GAS & HEAT EXAM PRACTICE EXAM WITH
200 QUESTIONS AND CORRECT ANSWERS| BRAND NEW
VERSION!
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
Diaphragm type differential pressure gauge is used to: - Correct Answer-Measure
air pressure
The pressure reading on a manometer is expressed in: - Correct Answer-Inches of
water
A technician measures the return air temperature of a 100,000 BTU output gas
furnace to be 65 degrees and the supply side air temperature is 135 degrees: -
Correct Answer-The CFM would be 1323
1|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
A dirty or clogged air filter in an operating gas furnace can cause an: - Correct
Answer-Increase temperature rise
Bent vanes on a direct drive blower wheel in a gas furnace can cause a: - Correct
Answer-Loss in airflow, excessive blower motor wear, and increase noise
A gas clothes dryer can interfere with the operation of a nearby natural draft gas
furnace with an atmospheric burner by: - Correct Answer-Stealing combustion air
preventing complete fuel burning
During a preventive maintenance check of a gas furnace: - Correct Answer-
Ductwork should always be checked for leaks and damage
When performing a cycle check during a preventive maintenance call, the
technician should: - Correct Answer-First, check with owner for equipment
performance
Next, turn the unit off at the thermostat system switch
Next, set fan switch to ON and check that the blower is running
The measurements required to calculate the CFM of a gas furnace are: - Correct
Answer-Entering air temperature
Leaving air temperature
Outdoor ambient and rated capacity
2|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
The reason for checking the temperature rise across the heat exchanger of a gas
furnace is to: - Correct Answer-Compare temperature differential to nameplate
rating
The technician is servicing a gas furnace located in a basement and the complaint
is "not enough heat". The following conditions exist: Properly sized furnace is
operating correctly; Temperature rise is within specification; Filter is clean and
CFM from blower is running. - Correct Answer-The most likely problem with this
system is the air side is leaking at one or more supply ducts
The technician is checking the operation of an induced draft furnace with an
atmospheric burner and a direct ignition system. On a call for heat the: Vent
blower comes on; Igniter glows; Main burner does not light; - Correct Answer-The
next check would be the gas supply and/or gas valve
The complaint is that there is static electricity throughout the house. The home
has a bypass humidifier. The technician has checked the humidistat and verified
that it is set properly. - Correct Answer-The next check would be to see if the
humidifier damper is open.
A customer complains the unit is "blowing cold air". The technician determines
that the problem occurs at the end of the heating sequence. The furnace used an
electronic integrated blower control. - Correct Answer-The likely problem with the
system is the blower off delay is set too long.
What precautions are required when mounting any gas furnace on a wood
platform in an attic? - Correct Answer-None
3|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
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.
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
4|Page
