Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

EPA 608 Exam Questions and Answers: Comprehensive Guide for Certification, Exams of Nursing

A comprehensive set of questions and answers covering various aspects of the epa 608 exam, designed to help individuals prepare for the certification. It covers topics such as refrigerant handling, system servicing, ozone depletion, and environmental regulations. A valuable resource for technicians seeking to obtain their epa 608 certification.

Typology: Exams

2024/2025

Available from 12/31/2024

TUTOR1
TUTOR1 🇺🇸

3.6

(15)

2.4K documents

Partial preview of the text

Download EPA 608 Exam Questions and Answers: Comprehensive Guide for Certification and more Exams Nursing in PDF only on Docsity!

EPA 608 EXAM ACTUAL EXAM

QUESTIONS AND 100%

CORRECT ANSWERS LATEST

AND COMPLETE UPDATE 2024-

2025 WITH EXPERT VERIFIED

SOLUTIONS ASSURED PASS A+

[Document subtitle]

[DATE]

[COMPANY NAME]

[Company address]

1 | P a g e

  1. Which of the following is illegal?
  • ANSWER: Knowingly releasing refrigerants during the service, maintenance, repair, or disposal of appliances
  1. Which refrigerant(s) must be recovered.
  • ANSWER: all non-exempt refrigerants
  1. What is a violation of the Clean Air Act or EPA's regulations?
  • ANSWER: Failing to keep required records Failing to meet the required evacuation levels before opening or disposing of appliances Knowingly releasing CFC, HCFC, or HFC refrigerants while repairing appliances 2 | P a g e
  1. During servicing of any refrigeration system, the refrigerant must be.
  • ANSWER: recovered
  1. Which gas would cause the least damage when used for leak checking? Dry nitrogen alone
  2. Approved refrigerant recovery cylinders have Yellow tops and gray bodies
  1. What provides the cooling in a vapor compression refrigeration system? The vaporization of the liquid refrigerant. 3 | P a g e
  2. Which refrigerants is an HFO? R-1234yf
  3. State and local governments. an make laws that are stricter requirements than the federal regulations
  4. to verify the allowable machine test pressure. Use the value on the system nameplate
  5. can be recovered into the same cylinder 4 | P a g e Only 1 refrigerant
  6. What action violates the EPA's prohibition on venting?
  • ANSWER: Opening the system without properly recovering the refrigerant first
  1. What does NOT require Section 608 certification?
  • ANSWER: Rewiring a condenser fan
  1. How does the GWP of R-410A compare to carbon dioxide?
  • ANSWER: The GWP of R-410A is thousands of times greater.
  1. Which refrigerant release is illegal? 5 | P a g e
  • ANSWER: Venting refrigerant from an approved dual-refrigerant recovery machine to switch working fluids.
  1. Portable refillable tanks must meet standards.
  • ANSWER: Department of Transportation
  1. the speed of dehydration
  • ANSWER: The size of the equipment being evacuated and the size of the vacuum pump both affect The ambient temperature affects The moisture in the system affects
  1. If technicians lose their certification card, they must.
  • ANSWER: request a replacement from the company that provided the certification 6 | P a g e
  1. make(s) HFO refrigerants less flammable than HC refrigerants.
  • ANSWER: Fluorine
  1. Never fill a refillable refrigerant cylinder beyond
  • ANSWER: 80% of its capacity by weight
  1. is the removal of refrigerant from a system and storing it in a container without testing or processing it in any way
  • ANSWER: Recovering
  1. The EPA refers to a "retrofit" as.
  • ANSWER: a conversion of the system to use a different refrigerant 7 | P a g e
  1. Before recycling or discarding, a disposable cylinder should be.
  • ANSWER: emptied to 0 psig and then rendered useless by puncturing or breaking off the valve
  1. What refrigerant servicing does NOT require Section 608 certification?
  • ANSWER: carbon dioxide refrigerant
  1. Which material is NOT compatible with any HFO refrigerant?
  • ANSWER: Silicone
  1. If a system cannot maintain a vacuum, the system.
  • ANSWER: could have a leak or still be evaporating off trapped refrigerant or moisture 8 | P a g e
  1. The high-pressure gauge on a typical gauge manifold set is typically colored .
  • ANSWER: red
  1. A system is evacuated.
  • ANSWER: to dehydrate the system
  1. means that the refrigerant blend has a range of bubble or dew points at a constant pressure.
  • ANSWER: Temperature glide
  1. When a system is operating, the changes a low-pressure vapor to a high- pressure vapor.
  • ANSWER: compressor 9 | P a g e
  1. The pressure range that is typically displayed on a high-pressure manifold gauge is .
  • ANSWER: 0 to 800 psig
  1. refrigerant has an ODP that is greater than 0
  • ANSWER: R- 22
  1. A "self-contained" recovery device.
  • ANSWER: removes refrigerant with the assistance of components in the appliance
  1. When a system is operating, refrigerant enters the compressor of a refrigeration system as a. 10 | P a g e
  • ANSWER: superheated vapor
  1. Ozone depletion is caused by in HCFC refrigerants.
  • ANSWER: chlorine
  1. the speed of evacuation.
  • ANSWER: The size of the equipment being evacuated and the size of the vacuum pump both affect The ambient temperature affects The moisture in the system affects
  1. The production and import of new R-22 in the U.S. to service existing systems is banned beginning in.
  • ANSWER: 2020
  1. Non-azeotropic refrigerants leak from a system _. 11 | P a g e
  • ANSWER: at uneven rates because of the different vapor pressures
  1. Service hoses used for system evacuation _.
  • ANSWER: should be equal to or larger than the pump intake connection for faster evacuation
  1. Low ambient temperatures recovery time.
  • ANSWER: increase
  1. Use to determine a safe pressure for leak testing.
  • ANSWER: the value on the low-side test pressure data plate
  1. Which refrigerant is considered a high-pressure refrigerant? 12 | P a g e R-410A
  2. has the lowest ODP. R-410A
  3. EPA regulations require appliances to have a service aperture or process stub
  4. If R-410A was added to an R-22 system, recover the mixture in a separate recovery tank 13 | P a g e
  5. Hygroscopic oils.

absorb lots of moisture

  1. Always measure the final system vacuum. with the system isolated from the vacuum pump
  2. Which of the following gases help form the earth's protective shield? Stratospheric ozone
  3. is the only EPA SNAP approved "drop-in" replacement for R-22. There are no direct drop-in refrigerant substitutes. 14 | P a g e
  4. Never operate a hermetic compressor when the system. is evacuated
  5. What is one of the most serious results of loss of the stratospheric ozone layer? Increased rates of skin cancer
  6. How much can a technician be fined for venting a non-exempt refrigerant from a system?

44,539 per day per violation

  1. Which refrigerant depletes the ozone layer? 15 | P a g e R- 22
  2. Which of the following is a lawful use of HCFC-22? Servicing existing R-22 systems
  3. The ability of a substance to destroy ozone in the stratosphere is referred to as.
  • ANSWER: ODP (ozone depletion potential)
  1. How should disposable cylinders be discarded?
  • ANSWER: Recover all remaining refrigerant, render the cylinders useless, and recycle the metal.
  1. refrigerants are the most harmful to stratospheric ozone. 16 | P a g e
  • ANSWER: CFCs
  1. damages stratospheric ozone.
  • ANSWER: HCFCs
  1. Which of the following synthetic lubricants is used with ternary refrigerant blends containing HCFCs?
  • ANSWER: Alkylbenzene
  1. EPA regulations only allow recovered or recycled refrigerant to be.
  • ANSWER: charged into the same or another appliance owned by the same person
  1. The program identifies alternative refrigerants for use 17 | P a g e SNAP
  2. Which health effect increases from loss of the stratospheric ozone layer? Cases of cataracts and skin cancer
  3. Non-toxic refrigerants can still cause death because they are heavier than air and can cause asphyxia
  4. According to the Roland-Molina theory, are destroyed by each chlorine atom in the stratosphere

100,000 ozone molecules 18 | P a g e

  1. What makes HFC refrigerants damaging to the environment? They can have very high global warming potentials.
  2. Which refrigerant is an HFC? R-134a
  3. A refrigerant cylinder that has a gray body and a yellow top is designed to hold . recovered refrigerant
  4. HFC refrigerants contain. 19 | P a g e Hydrogen, fluorine, and carbon
  5. When servicing an R-22 system you CANNOT. top off the unit with R-407C
  1. Which refrigerant can be purchased if you don't have EPA's Section 608 certification? Only refrigerants that are exempt from the venting prohibition.
  2. The low-pressure gauge on a typical gauge manifold set is colored. blue 20 | P a g e
  3. The Montreal Protocol is. n international treaty that addresses ozone-depleting substances and their alternatives
  4. Oxygen or compressed air should never be used to pressurize a system because oxygen or compressed air can explode when mixed with compressor oil or some refrigerants
  5. A recovery device uses the compressor in the appliance and/or the pressure of the refrigerant in the appliance.
  • ANSWER: system-dependent 21 | P a g e
  1. Department of Transportation (DOT) regulations require the to be recorded on the shipping paper for hazard class 2.2 Nonflammable Compressed Gases.
  • ANSWER: number of cylinders of each gas
  1. Under normal conditions, refrigerant enters the compressor of a refrigeration system as a .
  • ANSWER: low-pressure vapor
  1. Which of the following is classified as an A2L refrigerant?
  • ANSWER: R-1234yf R-1234ze(E) R- 32
  1. refrigerants have the highest ODP. 22 | P a g e
  • ANSWER: CFCs
  1. The center port on a three-port manifold used to _
  • ANSWER: connecting to recovery devices, vacuum pumps, and refrigerant charging cylinders
  1. A system is considered dehydrated when_.
  • ANSWER: a micron-gauge shows you have reached and held a vacuum of 500 microns or less with the vacuum pump isolated from the system
  1. The capacity of a vacuum pump and its suction line size affect.
  • ANSWER: moisture removal and evacuation time
  1. When measuring a vacuum of the system, the vacuum gauge should be connected 23 | P a g e .
  • ANSWER: to the system as far as possible away from the vacuum pump
  1. An example of an HCFC refrigerant is:
  • ANSWER: R- 123
  1. Technicians who violate Clean Air Act provisions.
  • ANSWER: can lose their certification
  1. Which type of refrigerant typically has the lowest global warming potential?
  • ANSWER: HFOs 24 | P a g e
  1. The release of any CFC, HCFC, or HFC refrigerant during is illegal.
  • ANSWER: theft of equipment
  1. Ester-based oils like POE can be mixed with.
  • ANSWER: no other oils
  1. When planning to recovery flammable refrigerants, always ensure that.
  • ANSWER: the recovery machine is rated for the refrigerant being recovered the recovery machine and the recovery tank are grounded
  1. EPA recommends this service practice to conserve refrigerant.
  • ANSWER: Find and repair leaks in the system. 25 | P a g e
  1. The Department of Transportation (DOT) requires when transporting cylinders containing used refrigerant.
  • ANSWER: DOT classification tags
  1. All non-exempt refrigerants.
  • ANSWER: must be recovered before opening or disposing of appliances
  1. is cleaning the refrigerant for immediate reuse by oil separation and single or multiple passes through devices, like replaceable core filter driers
  • ANSWER: Recycling
  1. HFO refrigerants are miscible in lubricants.
  • ANSWER: POE lubricants 26 | P a g e
  1. How do scientists know that the chlorine in the stratosphere is not primarily from volcanoes?
  • ANSWER: The amounts of chlorine and fluorine are similar and fluorine does not come from volcanoes. The rise in chlorine levels in the stratosphere matches the rise in ozone- depleting emissions. Volcanic eruptions only produce a small quantity of chlorine.
  1. Long hoses between the unit and the recovery machine
  • ANSWER: can cause excessive pressure drop and increased recovery time
  1. CFCs and HCFCs making them capable of reaching the stratospheric ozone layer.
  • ANSWER: do not dissolve in water or easily break down in the atmosphere. 27 | P a g e
  1. In there is a large release of refrigerant in a contained area
  • ANSWER: leave the area, and return with self-contained breathing apparatus
  1. The fill level of a recovery cylinder can be determined by.
  • ANSWER: mechanical-float or electronic shut-off devices the weight of the cylinder
  1. Before recharging any flammable hydrocarbon or HFO refrigerant, always .
  • ANSWER: electrically ground the recovery machine and recovery tank, and verify the refrigeration system is grounded
  1. install a fresh filter drier, successfully complete a standing- pressure leak check at the maximum system pressure, and then evacuate to at least 500 microns
  2. HCFC refrigerants are made up of. 28 | P a g e
  • ANSWER: Hydrogen, chlorine, fluorine, and carbon
  1. You heat a system during dehydration
  • ANSWER: to raise the vapor pressure of the water in the system and decrease dehydration time
  1. Ozone contains.
  • ANSWER: molecules containing 3 oxygen atoms
  1. When disposing of an appliance with 5-50 pounds of refrigerant, you must record .
  • ANSWER: the type of refrigerant recovered 29 | P a g e
  1. Which of the following proves that HCFCs are in the stratosphere?
  • ANSWER: HCFCs found in air samples from the stratosphere.
  1. When a system is operating, the changes the refrigerant from a high- pressure vapor to a high-pressure liquid?
  • ANSWER: condenser
  1. contains chlorine.
  • ANSWER: R- 22
  1. All new recovery equipment must.
  • ANSWER: be EPA approved and have an EPA-approved certification label attached 30 | P a g e
  1. Dehydrating means to remove.
  • ANSWER: water and water vapor
  1. All non-azeotropic refrigerants should be charged.
  • ANSWER: as a liquid
  1. Reusable refrigerant containers that store refrigerant at any pressure above 15 psig (at normal ambient temperature) must be hydrostatically tested every.
  • ANSWER: 5 years
  1. Which is recommended after a burnout?
  • ANSWER: Install both a liquid line and suction line filter drier. Flush the system (not compressor) with a commercial system flushing solution. Purge with dry nitrogen before and after using the flushing solution. 31 | P a g e
  1. The EPA considers the most effective for locating the general area of a small leak.
  • ANSWER: electronic or ultrasonic tester
  1. A refrigerant label is placed on the.
  • ANSWER: ylinder to identify the refrigerant
  1. When a system using POE oil has been opened, what is the minimum evacuation level that should be achieved and held before charging the system?
  • ANSWER: 500 microns
  1. After a refrigerant is phased-out, supplies of that refrigerant for equipment servicing can only come from . 32 | P a g e recovered and reclaimed refrigerant
  2. Which of the following refrigerants has the lowest global warming potential? R-600a
  3. The stratospheric ozone layer protects us from. ultraviolet radiation from the sun
  4. Which refrigerant contains chlorine? R- 12 33 | P a g e
  1. Distributors must verify before they can sell refrigerant? that the purchaser employs at least one Section 608 certified technician
  2. Which refrigerant release is allowable by the EPA because the refrigerant is "exempt." Releasing isobutane from a household freezer
  3. When transferring liquid in service hoses, you should guard against trapping .
  • ANSWER: iquid refrigerant in the service hose between closed service valves 34 | P a g e
  1. In refrigerant accidents where death occurs, the major cause is.
  • ANSWER: oxygen deprivation
  1. The service hose between the system and the vacuum pump should.
  • ANSWER: be as short as possible
  1. Before working with any unknown solvents, chemicals, or refrigerants, always review the.
  • ANSWER: safety data sheet (SDS)
  1. What does a Section 608 certification allow a technician to do?
  • ANSWER: Purchase or handle controlled refrigerants
  1. Before disposing of any appliance containing refrigerant. 35 | P a g e
  • ANSWER: recover the refrigerant
  1. Which of the following is NOT classified as an A3 refrigerant?
  • ANSWER: R-1234yf
  1. Under the EPA's new regulations, when can disposable cylinders be used to recover refrigerant?
  • ANSWER: Never.
  1. A reduction in stratospheric ozone causes.
  • ANSWER: Decreased crop yields and damage to marine organisms
  1. Which ASHRAE refrigerant safety classification is the safest? 36 | P a g e
  • ANSWER: A1
  1. After proper R-410A refrigerant recovery, you should use to leak check the system.
  • ANSWER: nitrogen, and if a trace gas is desired, add a small amount of R- 410A
  1. A system containing a flammable refrigerant must have the process tubes marked with a color
  • ANSWER: red
  1. Refrigerant vapors should never be inhaled because they.
  • ANSWER: could cause heart irregularities or unconsciousness
  1. When working with nitrogen,. 37 | P a g e
  • ANSWER: always use a nitrogen regulator always have a pressure relief valve downstream of the regulator never use liquid nitrogen
  1. An oil sample should be taken for which of the following reasons?
  • ANSWER: Moisture or acid is suspected.
  1. When a system is operating, refrigerant leaves the condenser as a.
  • ANSWER: high-pressure liquid
  1. Reclaimed refrigerant must be tested to meetbefore it can be resold.
  • ANSWER: AHRI 700 38 | P a g e
  1. If corrosion is discovered in the body of a relief valve, the valve must be .
  • ANSWER: replaced
  1. What is being done in the U.S. to stop damage to the stratospheric ozone layer?
  • ANSWER: Eliminating the use of CFCs and HCFCs refrigerants
  1. Which appliances are NOT covered by EPA regulations?
  • ANSWER: Desiccant dehumidifiers
  1. When woking with nitrogen.
  • ANSWER: always use a pressure regulator on the nitrogen cylinder always have a pressure relief valve downstream of the pressure regulator never use liquid nitrogen 39 | P a g e
  1. returns refrigerant to new product specifications and requires chemical analysis to verify the purity to AHRI-700 standards.
  • ANSWER: Reclaiming
  1. Refrigerant cylinders should.
  • ANSWER: be free of rust and damage and have a valid pressure test marking never be filled to more than 80% of capacity always be labeled and secured in the vehicle
  1. The EPA's "safe disposal requirements", make the responsible for ensuring that all refrigerant has been removed from household refrigerators before they are disposed
  • ANSWER: final person in the disposal chain
  1. Which is NOT a "refrigerant" as it is used in EPA's regulations? 40 | P a g e
  • ANSWER: A leak trace gas.
  1. Never mix different refrigerants in the same container because.
  • ANSWER: they could be impossible to reclaim
  1. , only containers designated "refillable" by DOT can be used for transporting recovered pressurized refrigerant.
  • ANSWER: To meet safety requirements
  1. can combine to cause a fire or explosion when working with flammable hydrocarbon refrigerants
  • ANSWER: A sufficient concentration of the refrigerant in the space and an ignition source
  1. A ternary blend refrigerant is a. 41 | P a g e
  • ANSWER: three-part mixture
  1. Which refrigerant is considered a low-pressure refrigerant?
  • ANSWER: R- 123
  1. Which is a violation of EPA or Clean Air Act regulations?