NATE Gas Heating (Air) exam with correct answers 2024
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Course
NATE Gas Heating Service Prep Ex
Institution
NATE Gas Heating Service Prep Ex
ACCA Manual J correct answers Manual for accurate residential load calculations
A.F.U.E. correct answers Annual Fuel Utilization Efficiency
Dampers correct answers Control supply airflow to each zone
Separate and independent systems correct answers Condition air in each zone
Thermos...
NATE Gas Heating (Air) Service Prep
Exam Study Guide
ACCA Manual J correct answers Manual for accurate residential load
calculations
A.F.U.E. correct answers Annual Fuel Utilization
Efficiency
Dampers correct answers Control supply airflow to
each zone
Separate and independent systems correct answers Condition air in
each zone
Thermostat correct answers Set to medium high blower speed for air
balancing check
Electromechanical thermostat correct answers Similar to electronic
programmable
thermost
at
Mercury bulb thermostat correct answers Critical for proper
operation
Manometer correct answers Measures pressure in inches
of water
Differential pressure gauge correct answers Measures duct static
pressure
Supply side pressure loss correct answers
0.15 IWC
Return side pressure loss correct answers
0.55 IWC
Total effective length of supply ductwork correct answers
380 feet
Total effective length of return ductwork correct answers
325 feet
Air balancing report correct answers Includes total pressure, static pressure,
and outlet
pressur
e
Design air velocity correct answers 700 to 900 FPM in main
supply trunk
Dampers correct answers Open completely in all
rooms
Economizers or fresh air supplies correct answers Never near a
sewage vent
Motorized economizer correct answers Check that vanes operate
without binding
Infiltration correct answers Leakage of air into a
conditioned space
, Electronic air cleaners correct answers Sized based on CFM of
return side
Electronic control correct answers Check on board transformer voltages
and output
voltage
s
Category 1 vented appliance correct answers Vent height from flue collar to
top of vent
Vertical combustion air intake correct answers Height limitation set by
manufacturer
Combustion air from non-direct, condensing gas furnace correct answers
Acceptable
any interior in
unconfined
space
Unconfined space for non-direct vented furnace in basement correct
answers
20 ft3 of At
airleast
volume per 1000 BTU/h
capacity
Termination of intake and exhaust for condensing gas furnace correct
answersmanufacturer's
specific Use termination kit or meet
requirements
Vent system for condensing gas furnace correct answers Never route
exhaust
water into exhaust
heater
vent
Gas clothes dryer correct answers Can interfere with nearby natural draft
gasstealing
by furnacecombustion
air
Crawlspace applications of direct vented gas furnaces correct answers
Requireconnected
intake air from outdoors to furnace combustion air
opening
Complete combustion of natural gas correct answers Forms carbon dioxide
and water
vapo
r
Carbon Monoxide (CO) problem correct answers Use CO detector
reader/recorder
determine to
if problem
exists
Combustion test correct answers Taken after gas furnace reaches
steady state
Temperature probes correct answers Measure temperature rise across heat
exchanger
Natural gas leak correct answers Check with soap
solution
Leak detecting solutions for gas piping correct answers Preferred over
household soap
solution
s
Pressurization leak test of fuel gas pipe correct answers Use
compressed air
Induced draft blowers correct answers Pull combustion air from
outdoors only
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