NATE CORE EXAM 2 FINAL PAPER 2026
QUESTIONS WITH FULL ANSWERS
◉ b (air velocity) Answer: An anemometer uses a small fan blade to
measure ____.
a. air pressure
b. air velocity
c. air volume
d. static pressure
◉ c (No flux is required) Answer: What is one of the advantages of
using silver brazing rods for copper-to-copper joints?
a. A lower melting temperature is required
b. A propane torch is normally used
c. No flux is required
d. No nitrogen purge is needed
◉ d (all of the above) Answer: "Housekeeping" includes ____.
a. disposal of waste
,b. fire prevention and protection
c. proper storage of materials
d. all of the above
◉ b (Goggles) Answer: What type of eye protection should you wear
when drilling overhead?
a. Face shield
b. Goggles
c. Side shields
d. Spectacles
◉ b (DOT) Answer: What agency regulates cylinders and chemicals
transported in a service vehicle?
a. ASHRAE
b. DOT
c. EPA
d. OSHA
◉ a (contain information about personal protective equipment)
Answer: Material safety data sheets ____.
,a. contain information about personal protective equipment
b. do not provide recommendations regarding emergency
procedures
c. should be kept in a safe place off-site
d. should be read after any chemical products have been used
◉ d (Never) Answer: When should oxygen be used in a refrigeration
system?
a. To clear a restriction in the line
b. To pressurize for leak-testing
c. To purge lines for brazing
d. Never
◉ c (Class A is an "ordinary" fire that involves the burning of wood,
paper, or textile products, extinguishing agent: water. Class B is a fire
that contains oil, grease, paint, varnish, or other chemicals,
extinguishing agent: foam. Class C is an electrical fire, extinguishing
agent: carbon dioxide.) Answer: Which of the following
classifications of fire extinguishers should be used for electrical
fires?
a. A
, b. B
c. C
d. D
◉ d (All of the above: asphyxiating, flammable, toxic) Answer: Which
of the following categories could be considered a hazardous
atmosphere in a confined space?
a. Asphyxiating
b. Flammable
c. Toxic
d. All of the above
◉ a (Low oxygen level) Answer: Which of the following best
describes an asphyxiating atmosphere?
a. Low oxygen level
b. Presence of ammonia
c. Presence of carbon monoxide
d. Presence of nitrogen
QUESTIONS WITH FULL ANSWERS
◉ b (air velocity) Answer: An anemometer uses a small fan blade to
measure ____.
a. air pressure
b. air velocity
c. air volume
d. static pressure
◉ c (No flux is required) Answer: What is one of the advantages of
using silver brazing rods for copper-to-copper joints?
a. A lower melting temperature is required
b. A propane torch is normally used
c. No flux is required
d. No nitrogen purge is needed
◉ d (all of the above) Answer: "Housekeeping" includes ____.
a. disposal of waste
,b. fire prevention and protection
c. proper storage of materials
d. all of the above
◉ b (Goggles) Answer: What type of eye protection should you wear
when drilling overhead?
a. Face shield
b. Goggles
c. Side shields
d. Spectacles
◉ b (DOT) Answer: What agency regulates cylinders and chemicals
transported in a service vehicle?
a. ASHRAE
b. DOT
c. EPA
d. OSHA
◉ a (contain information about personal protective equipment)
Answer: Material safety data sheets ____.
,a. contain information about personal protective equipment
b. do not provide recommendations regarding emergency
procedures
c. should be kept in a safe place off-site
d. should be read after any chemical products have been used
◉ d (Never) Answer: When should oxygen be used in a refrigeration
system?
a. To clear a restriction in the line
b. To pressurize for leak-testing
c. To purge lines for brazing
d. Never
◉ c (Class A is an "ordinary" fire that involves the burning of wood,
paper, or textile products, extinguishing agent: water. Class B is a fire
that contains oil, grease, paint, varnish, or other chemicals,
extinguishing agent: foam. Class C is an electrical fire, extinguishing
agent: carbon dioxide.) Answer: Which of the following
classifications of fire extinguishers should be used for electrical
fires?
a. A
, b. B
c. C
d. D
◉ d (All of the above: asphyxiating, flammable, toxic) Answer: Which
of the following categories could be considered a hazardous
atmosphere in a confined space?
a. Asphyxiating
b. Flammable
c. Toxic
d. All of the above
◉ a (Low oxygen level) Answer: Which of the following best
describes an asphyxiating atmosphere?
a. Low oxygen level
b. Presence of ammonia
c. Presence of carbon monoxide
d. Presence of nitrogen
