EPA 608 CERTIFICATION CORE
ACTUAL EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS
ALREADY GRADED A+ LATEST
VERSION 2026 GUARANTEED PASS
"Which type of leak detector works by drawing the vapor into the system and heating it:
Fluorescent leak detector
Electronic leak detector
Helium leak detector
Ultrasonic leak tester - CORRECT ANSWER=>Electronic leak detector"
"The color of the pressure port of the manifold pressure gauge that is connected to the low
pressure side of the system:
Green
Yellow
Blue
Red - CORRECT ANSWER=>Blue"
"Recovered refrigerant if it is clean can be returned to the same system or other systems owned
by the same person without restriction:
False
True - CORRECT ANSWER=>True"
"Two refrigerants are not allowed to collect into one recovery cylinder because:
Recovery back of two refrigerants from mixture is not possible
Refrigerant mixture can react each other and explode
1|Page
,Both the options are correct - CORRECT ANSWER=>Recovery back of two refrigerants from
mixture is not possible"
"R-134a belongs to which of the following refrigerant group:
HFC
HCFC
CFC - CORRECT ANSWER=>HFC"
"If the vacuum pump used is too large, water removal from the system will become:
Easier
Difficult
Remains same - CORRECT ANSWER=>Difficult"
"Motor Vehicle Air Conditioning (MVAC) service technicians are governed under EPA _____
section:
507
609
607
608 - CORRECT ANSWER=>609"
"The Diameter of the liquid line must be as _____ as possible to minimize the total refrigerant
pressure drop over the length of the liquid line and as ____ as possible to avoid refrigerant flash
large, small
small, large
large, large
small, small - CORRECT ANSWER=>Large, Small"
"Recovery and recycling equipment intended for use manufactured after _____ must be
certified to meet the requirements of ARI 740:
Nov 15, 1993
Dec 31, 1994
Dec 31, 1995
Jan 1, 1995 - CORRECT ANSWER=>Nov 15, 1993"
"Which of the following is used to minimize the leakage of refrigerant while checking the
pressure of the system:
2|Page
,Hand valves
Self-sealing hoses
Either can be used - CORRECT ANSWER=>Either can be used"
"This suction line filter drier should be located just upstream of the _____ inlet:
Expansion valve
Evaporator
Condenser
Compressor - CORRECT ANSWER=>Compressor"
"Ozone is a unstable molecule at stratosphere:
False
True - CORRECT ANSWER=>True"
"Which of the refrigerant is used in low pressure refrigerated appliance:
R-123
R-114
R-12
R-500 - CORRECT ANSWER=>R-123"
"A vacuum test allows air and moisture to enter the system if there is a leak:
False
True - CORRECT ANSWER=>True"
"If the label identifying the refrigerant is missing, then which of the following method is used to
identify the type of refrigerant:
Density-Temperature method
Density - Volume method
All the options are correct
Pressure-Temperature method - CORRECT ANSWER=>Pressure-Temperature method"
"Nitrogen reacts with hydrogen to form which of the following:
Nitrogen Hydride
Ammonia
Nitrogen does not react with hydrogen
Nitrogen Hydroxide - CORRECT ANSWER=>Ammonia"
3|Page
, "The pressure of Nitrogen at which that is introduced into the evacuation system after
evacuation of refrigerant is:
Equal the atmospheric pressure
Slightly above than the atmospheric pressure
Any atmospheric pressure
Slightly lower than the atmospheric pressure - CORRECT ANSWER=>Slightly above than the
atmospheric pressure"
"CFCs are highly reactive in lower levels of atmosphere:
False
True - CORRECT ANSWER=>False"
"Process involved for Reclaimation and Recycling of refrigerants are same:
True
False - CORRECT ANSWER=>False"
"CFC-11 and CFC-12 Ozone depleting substances contributes ______ of stratospheric chlorine
82%
18%
51%
70% - CORRECT ANSWER=>51%"
"Montreal Protocol is signed in which of the following year:
1995
1994
1987
2000 - CORRECT ANSWER=>1987"
"Low-pressure systems typically have a pressure relief valve set at ____ :
25 psi
10 psi
20 psi
4|Page
ACTUAL EXAM QUESTIONS WITH
DETAILED VERIFIED ANSWERS
ALREADY GRADED A+ LATEST
VERSION 2026 GUARANTEED PASS
"Which type of leak detector works by drawing the vapor into the system and heating it:
Fluorescent leak detector
Electronic leak detector
Helium leak detector
Ultrasonic leak tester - CORRECT ANSWER=>Electronic leak detector"
"The color of the pressure port of the manifold pressure gauge that is connected to the low
pressure side of the system:
Green
Yellow
Blue
Red - CORRECT ANSWER=>Blue"
"Recovered refrigerant if it is clean can be returned to the same system or other systems owned
by the same person without restriction:
False
True - CORRECT ANSWER=>True"
"Two refrigerants are not allowed to collect into one recovery cylinder because:
Recovery back of two refrigerants from mixture is not possible
Refrigerant mixture can react each other and explode
1|Page
,Both the options are correct - CORRECT ANSWER=>Recovery back of two refrigerants from
mixture is not possible"
"R-134a belongs to which of the following refrigerant group:
HFC
HCFC
CFC - CORRECT ANSWER=>HFC"
"If the vacuum pump used is too large, water removal from the system will become:
Easier
Difficult
Remains same - CORRECT ANSWER=>Difficult"
"Motor Vehicle Air Conditioning (MVAC) service technicians are governed under EPA _____
section:
507
609
607
608 - CORRECT ANSWER=>609"
"The Diameter of the liquid line must be as _____ as possible to minimize the total refrigerant
pressure drop over the length of the liquid line and as ____ as possible to avoid refrigerant flash
large, small
small, large
large, large
small, small - CORRECT ANSWER=>Large, Small"
"Recovery and recycling equipment intended for use manufactured after _____ must be
certified to meet the requirements of ARI 740:
Nov 15, 1993
Dec 31, 1994
Dec 31, 1995
Jan 1, 1995 - CORRECT ANSWER=>Nov 15, 1993"
"Which of the following is used to minimize the leakage of refrigerant while checking the
pressure of the system:
2|Page
,Hand valves
Self-sealing hoses
Either can be used - CORRECT ANSWER=>Either can be used"
"This suction line filter drier should be located just upstream of the _____ inlet:
Expansion valve
Evaporator
Condenser
Compressor - CORRECT ANSWER=>Compressor"
"Ozone is a unstable molecule at stratosphere:
False
True - CORRECT ANSWER=>True"
"Which of the refrigerant is used in low pressure refrigerated appliance:
R-123
R-114
R-12
R-500 - CORRECT ANSWER=>R-123"
"A vacuum test allows air and moisture to enter the system if there is a leak:
False
True - CORRECT ANSWER=>True"
"If the label identifying the refrigerant is missing, then which of the following method is used to
identify the type of refrigerant:
Density-Temperature method
Density - Volume method
All the options are correct
Pressure-Temperature method - CORRECT ANSWER=>Pressure-Temperature method"
"Nitrogen reacts with hydrogen to form which of the following:
Nitrogen Hydride
Ammonia
Nitrogen does not react with hydrogen
Nitrogen Hydroxide - CORRECT ANSWER=>Ammonia"
3|Page
, "The pressure of Nitrogen at which that is introduced into the evacuation system after
evacuation of refrigerant is:
Equal the atmospheric pressure
Slightly above than the atmospheric pressure
Any atmospheric pressure
Slightly lower than the atmospheric pressure - CORRECT ANSWER=>Slightly above than the
atmospheric pressure"
"CFCs are highly reactive in lower levels of atmosphere:
False
True - CORRECT ANSWER=>False"
"Process involved for Reclaimation and Recycling of refrigerants are same:
True
False - CORRECT ANSWER=>False"
"CFC-11 and CFC-12 Ozone depleting substances contributes ______ of stratospheric chlorine
82%
18%
51%
70% - CORRECT ANSWER=>51%"
"Montreal Protocol is signed in which of the following year:
1995
1994
1987
2000 - CORRECT ANSWER=>1987"
"Low-pressure systems typically have a pressure relief valve set at ____ :
25 psi
10 psi
20 psi
4|Page
