NATE CORE PRACTICE TEST 2026 QUESTIONS
WITH CORRECT ANSWERS
◉ How do you calculate cubic feet per minute? (cfm) Answer: By
multiplying the velocity of air passing through a duct X the area of
the duct.
◉ What does a balometer measure and how does it measure?
Answer: It measures airflow and cfm by capturing all of the air from
a diffuser through the measuring portion of the unit.
◉ What does a velometer measure and what is its purpose? Answer:
It measures velocity pressure and static pressure in order to
determine the air velocity in a duct.
◉ What is the grid pattern of measurements with a velometer
known as? Answer: A traverse.
◉ What is the purpose of the grid pattern known as a traverse?
Answer: It takes an average velocity through the duct to ensure an
accurate airflow measurement.
,◉ How do you determine the cfm of air moving through the duct?
Answer: By taking the average velocity multiplied by the area of the
duct.
◉ What are the most common methods for joining copper tubing?
Answer: Soldering or brazing.
◉ What can be soft soldered or hard soldered? Answer: A tubing
joint..
◉ What does soft soldering requrie? Answer: Flux.
◉ What can flux do to components and refrigeration system?
Answer: It can damage both.
◉ When is flux not required? Answer: When you are brazing a
copper-to-copper joint.
◉ When is flux required? Answer: Only if copper is being joined to
brass or steel.
◉ What do aluminum pipe and fittings require? Answer: Filler
material specially designed for aluminum.
, ◉ Many problems HVACr technicians face are? Answer: Electrical
problems.
◉ What is the pressure range of a standard compound gauge on a
refrigeration manifold? Answer: 30 in. Hg to 350 psig
◉ A vacuum gauge reads pressure in what? Answer: Microns.
◉ When talking to a customer what term should be used when
referring to refrigerant? Answer: Refrigerant. (NOT freon, gas, juice)
◉ Before leaving a service call, you should be sure to? Answer:
Demonstrate system operation and describe basic maintenance
procedures to the customer.
◉ What is housekeeping referred to as? Answer: Proper storage of
material and equipment. Regular clean-up of waste and debris. Fire
prevention and protection.
◉ Nealy half of all HVAC injuries are caused by? Answer:
Overexertion. Slips. Falls.
◉ When drilling overhead you shoud wear? Answer: Impact
resistant goggles.
WITH CORRECT ANSWERS
◉ How do you calculate cubic feet per minute? (cfm) Answer: By
multiplying the velocity of air passing through a duct X the area of
the duct.
◉ What does a balometer measure and how does it measure?
Answer: It measures airflow and cfm by capturing all of the air from
a diffuser through the measuring portion of the unit.
◉ What does a velometer measure and what is its purpose? Answer:
It measures velocity pressure and static pressure in order to
determine the air velocity in a duct.
◉ What is the grid pattern of measurements with a velometer
known as? Answer: A traverse.
◉ What is the purpose of the grid pattern known as a traverse?
Answer: It takes an average velocity through the duct to ensure an
accurate airflow measurement.
,◉ How do you determine the cfm of air moving through the duct?
Answer: By taking the average velocity multiplied by the area of the
duct.
◉ What are the most common methods for joining copper tubing?
Answer: Soldering or brazing.
◉ What can be soft soldered or hard soldered? Answer: A tubing
joint..
◉ What does soft soldering requrie? Answer: Flux.
◉ What can flux do to components and refrigeration system?
Answer: It can damage both.
◉ When is flux not required? Answer: When you are brazing a
copper-to-copper joint.
◉ When is flux required? Answer: Only if copper is being joined to
brass or steel.
◉ What do aluminum pipe and fittings require? Answer: Filler
material specially designed for aluminum.
, ◉ Many problems HVACr technicians face are? Answer: Electrical
problems.
◉ What is the pressure range of a standard compound gauge on a
refrigeration manifold? Answer: 30 in. Hg to 350 psig
◉ A vacuum gauge reads pressure in what? Answer: Microns.
◉ When talking to a customer what term should be used when
referring to refrigerant? Answer: Refrigerant. (NOT freon, gas, juice)
◉ Before leaving a service call, you should be sure to? Answer:
Demonstrate system operation and describe basic maintenance
procedures to the customer.
◉ What is housekeeping referred to as? Answer: Proper storage of
material and equipment. Regular clean-up of waste and debris. Fire
prevention and protection.
◉ Nealy half of all HVAC injuries are caused by? Answer:
Overexertion. Slips. Falls.
◉ When drilling overhead you shoud wear? Answer: Impact
resistant goggles.
