Question 1: What is the advantage of heating the system before evacuating it?
- Reduces the dehydration time
- increases the efficiency of dehydration
- increases the pressure in the system
- reduces the refrigerant leakage during evacuation
EPA 608
NEC 2023
EPA 608 Core Exam Practice Test 15
Free EPA 608 Practice Test ( CORE Exam)-15
TOPICS COVERED
epa 608 practice tests
How this test works
Read each question carefully
Look for absolute words like always / never — they often distinguish the right answer.
Manage your time
You have 20 min for 13 questions. Skip tough ones and come back.
Progress is auto-saved
Your answers are saved locally — a page refresh won't lose your work.
Review your answers
After submitting you'll see every explanation and your NEC references.
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.
13
Questions
20 min
Time
70%
Pass
Timer starts immediately. Progress is auto-saved.
0
Correct0
Wrong0s
TimeEPA 608 Core Exam Practice Test 15 — Question List
Question 2: Which of the following refrigerant has lowest Global Warming Potential (GWP)?
- R-12
- R-134
- R-22
- R-154a
Question 3: In the evaporator of refrigeration circuit, the refrigerant …………….
- Absorbs heat from the surrounding medium.
- Releases heat to the surrounding medium.
- changes from vapor to liquid
- pressure increases
Question 4: The effect of using of large vacuum pump in passive refrigerant recovery system is …………………
- Freezes the moisture in the system
- Freezes the oil in the system
- The refrigerant in the system will freeze
- The recovery process will speed up.
Question 5: The flow of refrigerant entering in to evaporator is controlled by ………………
- Differential pressure across the expansion valve
- Differential temperature across the expansion valve
- Differential pressure across the compressor
- Differential temperature across the compressor
Question 6: The refrigerant leaving the condenser is ……………………………
- High pressure liquid
- Low pressure liquid
- Low pressure vapour
- High pressure vapour
Question 7: What is the maximum typical pressure that a high pressure gauge can read?
- 500 psig
- 300 psig
- 800 psig
- 1000 psig
Question 8: EPA regulations require that the manifold gauge hoses should be equipped with …………….. to minimize the refrigerant loss when disconnecting the hoses.
- Low loss fittings
- Tightly bonded fittings
- Screw fitted fittings
- Regulatory fittings
Question 9: When the pressure readings in high and low pressure gauges is high it indicates that
- Air is present in the system
- Moisture present in system
- Over compression of refrigerant
- Insufficient Refrigerant
Question 10: Systems charged with more than 300 kg of HFC must …………..
- be leak tested once in month
- be fitted with permanent fixed leak detector
- be leak tested thrice a year
- be leak tested annually
Question 11: In refrigeration circuit which indicates that liquid line filter dryer is blocked?
- Bubbling in the slight glass
- High pressure reading in liquid line
- Low pressure reading in liquid line
- Oil leak in the system
Question 12: Which is an important factor when choosing a leak detection method?
- Type of refrigerant
- Charge capacity of the refrigerant
- Pressure of the refrigerant
- Material of the refrigeration container
Question 13: Lower ambient conditions around a refrigeration system will ……………. recovery time.
- Increase
- Decrease
Student Reviews
No reviews yet — be the first to share your experience!
Leave a Review