EPA 608 CERTIFICATION EXAM LATEST 2023-2024
ACTUAL EXAM ALL 300 REAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS WITH
RATIONALES (VERIFIED ANSWERS ) |ALREADY
GRADED A+
The EPA considers a major repair to be the replacement of what 4 items? - ANSWER- 1.Evaporator 2.Condenser 3.Compressor 4.Auxillary Heat Exchanger
When the refrigerant is put back into a Type III chiller, following recovery and system repair, where is it added? - ANSWER- The charging valve on the evaporator.
What method is used to find suspected water tube leaks in chillers? - ANSWER- Hydrostatic (tube) test
What temperature should be attained when removing oil from a low pressure system to ensure a lower level of refrigerants in the oil? - ANSWER- 130-Degrees F
The typical design burst pressure for a rupture disc is what? -
ANSWER- 15 PSIG
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Excessive moisture collection in the purge unit can indicate what? - ANSWER- Tube Leakage
Vacuum pumps need to be capable of pulling what level of vacuum? - ANSWER- 500 microns
All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - ANSWER- 35%
The most efficient method of leak checking a charged low-pressure system is to use? - ANSWER- Controlled hot water or heater blankets.
Systems with open drive compressors are prone to leak where? - ANSWER- At the shaft seal.
What does ASHRAE standard 15 require? - ANSWER- A refrigerant monitor that will sound and alarm and automatically start a ventilation system in equipment rooms before the refrigerant concentration reaches the TLV-TWA.
TLV-TWA - ANSWER- Threshold Limit Value, Time Weighted Average
A-1 Group Refrigerants only require what? - ANSWER- Oxygen Deprivation Sensor 2 / 4
All "B" rated refrigerants require what? - ANSWER- "Refrigerant Specific" Mechanical Room Sensor.
What are Cooling Towers? - ANSWER- They are heat removal devices used to transfer process waste heat to the atmosphere.
What is the maximum test pressure to use for pressurizing Type III centrifugal systems with nitrogen? - ANSWER- 10 psig
Enough vapor has entered the system and you may begin charging liquid refrigerant when the refrigerant saturation temperature increases to? -
ANSWER- 36F
Type 1 - ANSWER- Small appliances- 5lbs or less
Type 2 - ANSWER- Residental Units/ Light Commercial
Type 3 - ANSWER- Industrial
Universal - ANSWER- All types
Section 608 of the federal clean air act requires all persons who maintain, service, repair or dispose of appliances that contain regulated 3 / 4
refrigerants, be certified in proper refrigerant handling techniques as of - ANSWER- Nov 14th, 1994
What is used to cause a minimal amount of refrigerant to be released? - ANSWER- Low Loss Fitting
CFC Refrigerants - ANSWER- R-11, R-12, R-113, R-114,R-115
HCFC Refrigerants - ANSWER- R-22, R-123, R-124, R-1426
HFC Refrigerants - ANSWER- R-125, R-134A, R-23, R-32, R-125, R- 143a, R-152A
The compound gauge of the manifold that measures low pressure (psig) and vacuum (inches Hg.) is what color? - ANSWER- Blue Hose
The high pressure gauge of the manifold that measures the high side (discharge) pressure is what color? - ANSWER- Red Hose
The center port of the manifold that can be connected to a recovery device, evacuation vacuum pump or charging device is what color? - ANSWER- Yellow Hose
The Latin word for the least amount of Refrigerant you can release into the atmosphere? - ANSWER- De- Minimus
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