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HVAC TEST Questions Answered Correctly – Expert Latest Version 2024/2025
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HVAC TEST Questions Answered Correctly – Expert Latest Version 2024/2025
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HVAC TEST Questions Answered Correctly – ExpertLatest Version 2024/2025
Which of the following refrigerants contains chlorine? - ANSWER R-22
What is being done in the U.S, to stop damage to the stratospheric ozone layer? -
ANSWER Phasing out the use of chlorofluorocarbons (CFCs) and
hydrochlorofluorocarbons (HCFCs).
Which of the following is NOT a violation of the refrigerant management regulations
under the Clean Air Act? - ANSWER Failing to evacuate refrigerant in a leaking
system to at least 0 psig.
Which refrigerant can be purchased by someone who is NOT a Section 608
certified technician? - ANSWER Carbon Dioxide refrigerant.
Which of the following appliances is NOT covered by EPA Section 608 regulations? -
ANSWER Desiccant dehumidifiers
When do EPA's refrigerant management regulations exempt refrigerant from the
venting prohibition? - ANSWER When the EPA has determined that the refrigerant
in that type of appliance does not pose a threat to the environment if released.
Which of the following refrigerant releases is considered a violation of the prohibition
on venting? - ANSWER Refrigerants emitted when connecting or disconnecting
low loss hoses to charge or service an appliance.
What synthetic lubricant is presently used with ternary blends containing HCFCs? -
ANSWER Ester.
Which of the following is NOT a "refrigerant" as it is used in EPA's refrigerant
management regulations? - ANSWER A leak trace gas.
Which component changes a low-pressure vapor to a high-pressure vapor? -
ANSWER Compressor.
Manufacturers often color code the exterior of gauges. What color is the high-
pressure gauge on a typical gauge manifold set? - ANSWER Red
Which word applies to the process that returns refrigerant to new product
specifications and that requires chemical analysis? - ANSWER Reclaim
What gas should be used to leak check a system designed for use with R-410A that
has been opened for a major system repair? - ANSWER Pressurized nitrogen
, What should a technician do if they discover that some R-410A was added to an R-
22 system? - ANSWER Recover the mixture in a separate recovery tank.
Why should a system be evacuated? - ANSWER To dehydrate the system.
What are the two factors that, if present, are most likely to lead to an explosion with
hydrocarbon refrigerants? - ANSWER A sufficient concentration of the refrigerant
in the space and an ignition source.
How frequently must reusable containers for refrigerants that are under high
pressure (above 15 psig) at normal ambient temperature be hydrostatically tested? -
ANSWER 5 years.
The Department of Transportation regulations require which parameter to be
recorded on the shipping paper for hazard class 2.2 Nonflammable Compressed
Gases? - ANSWER
Who must certify recovery equipment used during maintenance, service or repair on
small appliances that use CFCs, HCFCS, and HFCS? - ANSWER
Which of the following does NOT meet the criteria for Type I appliance
certification? - ANSWER
When servicing a small appliance found to be leaking it is; - ANSWER
Which hydrocarbon refrigerant is approved for retrofit into existing household
refrigerators? - ANSWER
Which of the following best describes low loss fittings on refrigerant recovery devices
used to recover CFCs, HCFCs, and HFCs? - ANSWER
Recovery devices for use with small appliances containing CFCs, CFCs, and HFCs
must meet which of the following requirements? - ANSWER
Any person who opens an appliance containing a CFC, HCFC, or HFC for
maintenance, service or repair must have at least one self-contained recovery
machine available for use. The exception to this rule are persons working on; -
ANSWER
What type of certification is required for persons recovering CFCs, HCFCs, or HFCs
during maintenance, service, or repair of small appliances? - ANSWER
What is the maximum allowable factory charge of refrigerant for Type I appliances
using CFCs, HCFCs, or HFCs? - ANSWER
Which of the following is required when attaching a gauge set to check system
pressures? - ANSWER
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