Question 1: To service or refill the existing the CFC refrigeration systems in USA, the CFC should come from ……………… after 1995 onwards
- Recovery and recycling
- Solvent conversion
- From approved chemical laboratories
- European chemical manufactures
EPA 608
NEC 2023
EPA 608 Core Exam Practice Test 10
Free Online Practice Tests: EPA 608 Core Exam Practice Test-10
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Frequently Asked Questions
Yes — completely free with no account needed.
The EPA 608 certification is required by law for any technician who purchases or handles refrigerants. It covers safe handling, leak detection, recovery, and environmental regulations.
Type I covers small appliances (≤5 lbs refrigerant), Type II covers high-pressure systems, Type III covers low-pressure systems, and Universal covers all three. Most HVAC technicians pursue Universal certification.
You must score at least 70% on each section of the exam. The Universal exam has four parts: core, Type I, Type II, and Type III.
15
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23 min
Time
70%
Pass
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TimeEPA 608 Core Exam Practice Test 10 — Question List
Question 2: Which atoms can destroy more ozone molecules when they react with them?
- Chlorine
- Bromine
- Nitrogen
- Carbon
Question 3: ………….. is responsible for specific flow rates and pressure in the refrigeration circuit.
- Compressor
- Condenser
- Evaporator
- Expansion valve
Question 4: The low pressure gauge reads the system pressures above atmospheric pressure in ………….
- Pounds per Square Inch (PSIG)
- Inches of mercury (in.Hg)
- Pounds per Square Inch absolute (PSIA)
- Kilo Pascal (Kpa)
Question 5: What should be the typical pressure of disposable recovery cylinder before disposing it?
- Zero
- Low pressure below 10 psig
- Below 20 psig
- Below 14.2 psig
Question 6: HCFC-22 is a high pressure refrigerant.
- True
- False
Question 7: Electronic leak detector must have a sensitivity of …………………
- 5 g per year
- 10 g per year
- 15 g per year
- 20 g per year
Question 8: Which of the following refrigerant is leading candidate for CFC-12 retrofit?
- R-22
- R-134a
- R-234
- R-500
Question 9: What should be placed in the system to prevent any debris that may damage the compressor?
- A suction line filter dryer
- An accumulator
- A regulatory valve
- Moisture cleaner
Question 10: What does happen to system if moisture is still left in an operating system?
- Moisture mixes with oil and refrigerant and produces the acids
- Increases the pressure in condenser and affects heat transfer
- Operating compressor with moisture may damage the compressor motor windings
- Damages the evaporator coil
Question 11: With what the technician can conclude that the system is fully dehydrated?
- When the low pressure gauge reads deep vacuum
- When the pressure reading does not rise even after the vacuum pump is turned off
- When system pressure reading is normal in low pressure gauge
- When the shutoff valves are closed due to low deep vacuum during evacuation
Question 12: In case of recovery cylinders are not available, the disposable cylinders can be used as recovery cylinders after proper testing and approval
- True
- False
Question 13: When leak checking the refrigeration system never pressurize the system with ………….
- Nitrogen
- Oxygen
- Hydrogen
- Helium
Question 14: Which of the following refrigerants has lower ozone depletion potential (ODP)?
- R -11
- R-22
- R-134a
- R-12
Question 15: Which of the following refrigerant blend can also be charged as vapour?
- Alkylbenzene
- Zeotropic
- Azeotropic
- Near-azeotropic
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