EPA Certification Exam 2024: Complete 300 Questions with Detailed Answers, Exams of Nursing

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EPA CERTIFICATION EXAM 2024 ACTUAL EXAM COMPLETE 300

QUESTIONS WITH DETAILED VERIFIED ANSWERS (100% CORRECT

ANSWERS) ALREADY GRADED A+

Which Refrigerants contain the most chlorine? - CORRECT ANSWER

CFC's As of what date did it become unlawful to intentionally release Class 1 and Class 2 refrigerants to the atmosphere? - CORRECT ANSWER July 1, 1992 Which Refrigerants have the lowest zone depletion potential? - CORRECT ANSWER >>>>HFC's The molecule found in CFC's and HCHC's refrigerants that destroys the ozone in the stratosphere is: - CORRECT ANSWER >>>>Chlorine Stratospheric ozone consists of: - CORRECT ANSWER >>>>Three oxygen atoms Stratospheric ozone depletion is a _________ problem: - CORRECT ANSWER >>>>Global

The Gas in the stratosphere that protects us from ultraviolet radiation is: - CORRECT ANSWER >>>>Ozone Which refrigerant is a CFC? - CORRECT ANSWER >>>>R- 12 Which refrigerant is an HCFC? - CORRECT ANSWER >>>>R-123 & R- 22 Which refrigerant is an HFC? - CORRECT ANSWER >>>>R- 13 4a Which refrigerant contains no chlorine? - CORRECT ANSWER >>>>R- 134a The Molecule found in the stratosphere that indicates stratospheric ozone depletion is taking place is: - CORRECT ANSWER >>>>Chlorine monoxide The following actions would violate the clean air act (CAA): - CORRECT ANSWER >>>>Knowingly releasing Class 1 Class 2 substances failing to keep or falsifying required records failing to tech the required evacuation levels before opening a systems to the atmosphere for service One time (disposable) refrigerant cylinders are used for: - CORRECT ANSWER >>>>Virgin refrigerant The rule of thumb for refilling approved cylinders is a maximum of _____ percent liquid? - CORRECT ANSWER >>>>80% The time it takes to properly evacuate and dehydrate a system prior to charging with refrigerant is determined by the: - CORRECT ANSWER

Total volume of the system Amount of non-condensibles (moisture) in the system

Ambient Temperature A system that fails to hold a vacuum after the evacuation process: - CORRECT ANSWER >>>>May contain moisture May have a leak To recover refrigerant is to: - CORRECT ANSWER >>>>Remove refrigerant is any condition from a system in either an active or passive manner, and store it in an external container without necessarily testing or processing. The process that reduces contaminate in used refrigerant by oil separation with single and multiple passes through devices such as replaceable filter core driers, which reduces moisture, acidity, and particulate matter is: - CORRECT ANSWER >>>>Recycling The synthetic lubricant used with HCFC-based ternary blends is: - CORRECT ANSWER >>>>Alkyl benzene R-134a is "drop-in" refrigerant for: - CORRECT ANSWER >>>>R-134a is not a Drop-in refrigerant The refrigerant condition and state entering the condenser of an air conditioner is a: - CORRECT ANSWER >>>>Superheated Vapor The condition and state entering the condenser of an air conditioner is a: - CORRECT ANSWER >>>>Subcooled liquid The component of an air conditioning system that changes a low pressure vapor to a high pressure vapor is the: - CORRECT ANSWER

Compressor

Refrigerant cylinders should be shipped - CORRECT ANSWER >>>>In the vertical upright position For the maintenance, service or repair of small appliances, recovery equipment manufactured after ________ must be certified by an EPA approved organization? - CORRECT ANSWER >>>>November 15, 1993 Which best describes the definition of Type 1 "small appliance" as defined by EPA? - CORRECT ANSWER >>>>Systems manufactured, charged and hermetically sealed with five (5) pounds or less of refrigerant For small appliances use, the recovery equipment manufactured after November 15, 1993, must be capable of recovery: - CORRECT ANSWER

80% of the refrigerant when the compressor is not operating or achieve a 4-inch vacuum under ARI 740- 1993 90% of the refrigerant when the compressor is operating or achieve a 4- inch vacuum under ARI 740- 1993 Alkyl benzene R-134a is "drop-in" refrigerant for: - CORRECT ANSWER >>>>R-134a is not a Drop-in refrigerant The refrigerant condition and state entering the condenser of an air conditioner is a: - CORRECT ANSWER >>>>Superheated Vapor The condition and state entering the condenser of an air conditioner is a: - CORRECT ANSWER >>>>Subcooled liquid The component of an air conditioning system that changes a low pressure vapor to a high pressure vapor is the: - CORRECT ANSWER >>>>Compressor Refrigerant cylinders should be shipped - CORRECT ANSWER >>>>In the vertical upright position For the maintenance, service or repair of small appliances, recovery equipment manufactured after ________ must be certified by an EPA approved organization? - CORRECT ANSWER >>>>November 15, 1993 Which best describes the definition of Type 1 "small appliance" as defined by EPA? - CORRECT ANSWER >>>>Systems manufactured, charged and hermetically sealed with five (5) pounds or less of refrigerant For small appliances use, the recovery equipment manufactured after November 15, 1993, must be capable of recovery: - CORRECT ANSWER >>>>80% of the refrigerant when the compressor is not operating or achieve a 4-inch vacuum under ARI 740- 1993 90% of the refrigerant when the compressor is operating or achieve a 4- inch vacuum under ARI 740- 1993 The sale of Class 1 and Class 2 refrigerants will be restricted to technicians certified by an EPA approved program after: - CORRECT ANSWER >>>>November 14, 1994 The release of vapor from the top of a graduated charging cylinder, when filling, should: - CORRECT ANSWER >>>>Not be vented and should be recoverd Should regulation of the clean air act (CAA) change after a technicians certified: - CORRECT ANSWER >>>>It will be the technicians responsibility to learn and comply with future changes in the law

Containers of refrigerant R-134a are cooler coded: - CORRECT ANSWER

Light Blue System dependent (passive) refrigerant recovery of small appliances: - CORRECT ANSWER >>>>Do not require an operating compressor requires 80% of the refrigerant to be recovered Recovers refrigerant in a non-pressurized container Mixed refrigerants that are sent to reclaim centers: - CORRECT ANSWER Will be disposed of at the owner's expense Before disposing of a small appliance containing R-12, it is necessary to:

• CORRECT ANSWER >>>>Recover the refrigerant Hydrochloric and hydrofluoric acids are: - CORRECT ANSWER

Caused from CFC's or HCFC's in ht presence of moisture being exposed to high heat Damaging to the windings found in hermetic refrigeration and air conditioning systems To be avoided when handling with bare hands A system has been operating with a complete restriction at the capillary tube inlet, what access is required for recovery? - CORRECT ANSWER One access valve on the high side of the system Which of the following refrigerants can be mixed R-12 and R-134a R-12 and R- 11

Not be vented and should be recoverd Should regulation of the clean air act (CAA) change after a technicians certified: - CORRECT ANSWER >>>>It will be the technicians responsibility to learn and comply with future changes in the law Containers of refrigerant R-134a are cooler coded: - CORRECT ANSWER >>>>Light Blue System dependent (passive) refrigerant recovery of small appliances: - CORRECT ANSWER >>>>Do not require an operating compressor requires 80% of the refrigerant to be recovered Recovers refrigerant in a non-pressurized container Mixed refrigerants that are sent to reclaim centers: - CORRECT ANSWER >>>>Will be disposed of at the owner's expense Before disposing of a small appliance containing R-12, it is necessary to: - CORRECT ANSWER >>>>Recover the refrigerant Hydrochloric and hydrofluoric acids are: - CORRECT ANSWER >>>>Caused from CFC's or HCFC's in ht presence of moisture being exposed to high heat Damaging to the windings found in hermetic refrigeration and air conditioning systems To be avoided when handling with bare hands A system has been operating with a complete restriction at the capillary tube inlet, what access is required for recovery? - CORRECT ANSWER >>>>One access valve on the high side of the system Which of the following refrigerants can be mixed R-12 and R-134a R-12 and R- 11 R-22 and R- 502 - CORRECT ANSWER >>>>None of the refrigerants can be mixed CFC an HCFC refrigerants can cause suffocation because - CORRECT ANSWER >>>>They are heavier than air and displace oxygen

A nitrogen tank should always be equipped with a: - CORRECT ANSWER

Pressure regulator Nitrogen used for brazing processes, holding charges, or leak checking - CORRECT ANSWER >>>>May be vented tot he atmosphere Line tapping and piercing valves should always be removed from systems after repairs are completed because: - CORRECT ANSWER The Neoprene gaskets will eventually fail causing a leak CFC's will not be manufactured in the united states after: - CORRECT ANSWER >>>> The Law states that leaks in small appliances: - CORRECT ANSWER Do not have to be repaired, but should be repaired To work on small appliances after November 14, 1993, a technician must be certified as: - CORRECT ANSWER >>>>Type 1 Universal The required aperture typically found on small appliance systems is: - CORRECT ANSWER >>>>The process stub Packaged terminal heat pumps with less than Five (5) pounds of refrigerants must be serviced by certified: - CORRECT ANSWER Technicians with Type 1 Which refrigerants have a "0" ODP - CORRECT ANSWER >>>>HFC's Disposable refrigerants cylinders should be disposed of by: - CORRECT ANSWER >>>>Rendering useless and sent to salvage

Which refrigerant is a strong candidate for replacing CFC (R-12) in small appliances? - CORRECT ANSWER >>>>R-134a Which refrigerant can be used for leak detection as a trace gas and pressurized with nitrogen? - CORRECT ANSWER >>>>R- 22 Traces oil around the sight glass inlet fitting of refrigeration system might be the indication of: - CORRECT ANSWER >>>>A leak A condition of excessive superheat at the evaporator outlet and compressor inlet of an air conditioning system could be an indication of: - CORRECT ANSWER >>>>Low on refrigerant charge Type 2 classification, as identified by EPA, applies to what equipment? - CORRECT ANSWER >>>>Split air conditioning equipment with five (5) pounds of refrigerant and greater Front seating the three-way valve suction valve will close the: - CORRECT ANSWER >>>>Valve port to compressor the required level of evacuation for recovery equipment manufactured before November 15, 1993, on a system with an R-22 charge of less than 200 pounds is: - CORRECT ANSWER >>>>0 inches Hg The required level of evacuation for recovery equipment manufactured before November 15 1993, on a system containing less than 200 pounds of R-22 refrigerant is: - CORRECT ANSWER >>>>0 inches Hg The required level of evacuation for recovery equipment manufactured after November 15, 1993 on a system containing less tan 200 pounds of R-12 refrigerant is: - CORRECT ANSWER >>>>10 inches Hg

Industrial process and commercial refrigeration equipment with an annual leak rate of ___ % requires repairs under EPA regulations: - CORRECT ANSWER >>>>35% Comfort cooling chillers and all other equipment with an annual leak rate of ___% requires repair under EPA regulations: - CORRECT ANSWER >>>>15% Recovery time can be shortened by: - CORRECT ANSWER >>>>Recovery as much liquid as possible in he initial liquid line using short hoses cooling the recovery tank in ice water the majority of the liquid to be recovered from a system will be found in the: - CORRECT ANSWER >>>>Receiver (when applied) it becomes the owners responsibility to maintain records of all refrigerant added to unit that contain more thanks ___ pounds of refrigerant charged - CORRECT ANSWER >>>>50 pounds A major repair is defined by EPA, as replacing the: - CORRECT ANSWER

Compressor or the Evaporator exceptions to the required levels for recovery equipment that require an appliance be evacuated to only 0 psig apply to applications that: - CORRECT ANSWER >>>>Are filled with water or substances that would damage the recovery equipment the generally accepted rule for maximum filling of cylinders is: - CORRECT ANSWER >>>>80%

the refrigeration you would expect to find in a split air conditioning system manufactured before 1995 would be: - CORRECT ANSWER

R- 22 System dependent recovery equipment is limited o appliances containing less then ____ pounds of refrigerant: - CORRECT ANSWER 15 pounds the condition and state of refrigerant entering the receiver is: - CORRECT ANSWER >>>>Subcooled high pressure liquid the condition an state of refrigerant leaving the accumulator of a system is: - CORRECT ANSWER >>>>Superheated low pressure vapor deep vacuums used for evacuation and dehydration of systems are measured in: - CORRECT ANSWER >>>>Microns Non-condensibles in an air conditioning or refrigeration system will: - CORRECT ANSWER >>>>Tend to stay in the top of the condenser Increase the high side pressure Be purged with a recovery machine R-134a is a drop on replacement refrigerating for: - CORRECT ANSWER it is not a drop in replacement One of the easiest ways to identify the type of refrigerant in a system is to: - CORRECT ANSWER >>>>Check the name plate data At room ambient temperature of 80 degrees F, the pressure of a cylinder containing R-22 will be - CORRECT ANSWER >>>>143 psig Recovery machines using water as the conducing medium would generally use the: - CORRECT ANSWER >>>>Municipal water supply

frost would be best removed from a sight glass by: - CORRECT ANSWER

Spraying with alcohol Recovery cylinders are color coded: - CORRECT ANSWER >>>>Gray with yellow tops Which refrigerant is a CFC and has been used with low pressure appliances? - CORRECT ANSWER >>>>R- 11 Type 3 certification as classified by EPA is for: - CORRECT ANSWER Low pressure applications The maximum pressure that should be applied to a low pressure chiller leak checking with controlled nitrogen is: - CORRECT ANSWER >>>> psig The short term replacement refrigerant for R-11 chillers is - CORRECT ANSWER >>>>R- 123 Water tube leaks in a low pressure chiller are usually found with: - CORRECT ANSWER >>>>A hydrostatic tube test The required evacuation level for recovering refrigerant from low pressure appliance with recovery machine manufactured BEFORE November 15, 1993 is: - CORRECT ANSWER >>>>25 inches Hg The required evacuation level for recovering refrigerant from a low pressure appliance with a recovery machine manufactured AFTER November 15, 1993 is: - CORRECT ANSWER >>>>25 mm Hg absolute A low pressure chiller generally has the rupture disk set at: - CORRECT ANSWER >>>>15 psig

To prevent freezing of the water coils of a low pressure chiller, it is recommended that: - CORRECT ANSWER >>>>when charging, begin with vapor phase Circulate water through the chiller Do not inject liquid during charging until saturation temperature is above 32 degrees A low pressure chiller providing comfort cooling that has an annual leak rate of ___ % of the total charge, must be repaired: - CORRECT ANSWER

15%

R- 11 Type 3 certification as classified by EPA is for: - CORRECT ANSWER >>>>Low pressure applications The maximum pressure that should be applied to a low pressure chiller leak checking with controlled nitrogen is: - CORRECT ANSWER >>>> psig The short term replacement refrigerant for R-11 chillers is - CORRECT ANSWER >>>>R- 123 Water tube leaks in a low pressure chiller are usually found with: - CORRECT ANSWER >>>>A hydrostatic tube test The required evacuation level for recovering refrigerant from low pressure appliance with recovery machine manufactured BEFORE November 15, 1993 is: - CORRECT ANSWER >>>>25 inches Hg The required evacuation level for recovering refrigerant from a low pressure appliance with a recovery machine manufactured AFTER November 15, 1993 is: - CORRECT ANSWER >>>>25 mm Hg absolute A low pressure chiller generally has the rupture disk set at: - CORRECT ANSWER >>>>15 psig To prevent freezing of the water coils of a low pressure chiller, it is recommended that: - CORRECT ANSWER >>>>when charging, begin with vapor phase Circulate water through the chiller Do not inject liquid during charging until saturation temperature is above 32 degrees A low pressure chiller providing comfort cooling that has an annual leak rate of ___ % of the total charge, must be repaired: - CORRECT ANSWER >>>>15% R-134a us classified as a _____ under ASHRAE 34 standard safety group:

• CORRECT ANSWER >>>>A R-123 is classified as a ____ under ASHRAE standard safety group: - CORRECT ANSWER >>>>B- 1 Under ASHRAE standard 15, what refrigerant requires equipment room seniors? - CORRECT ANSWER >>>>R- 123 Under ASHRAE standard 15, the following refrigerations require equipment room oxygen deprivation sensors: - CORRECT ANSWER

R- 11 R- 12 R-134a Low pressure chillers require purge units because: - CORRECT ANSWER they operate below atmospheric pressure they draw non-condesibles through gaskets and seals the rupture disk of a low pressure chiller is connected to the: - CORRECT ANSWER >>>>Low side

the purge unit draws from the: - CORRECT ANSWER >>>>top of the condesor Before a low pressure appliance is dismantled and salvaged: - CORRECT ANSWER >>>>The refrigerant must be recovered Machine room safety standards have been established by: - CORRECT ANSWER >>>>ASHRAE 15 Refrigerant vapor is charged into a low pressure chiller initially to prevent: - CORRECT ANSWER >>>>water freeze up caused by system vacuum If excessive nitrogen pressure is exerted within a low pressure chiller, what component would fail: - CORRECT ANSWER >>>>Rupture Disk R-11 and R- 12 3 refrigerants are: - CORRECT ANSWER >>>>Oxygen depleting Heavier than air Are class 1 and 2 substances as defined by the EPA What is EPA 608 Type II certification? - CORRECT ANSWER >>>>Persons who maintain, service, repair, or dispose of high and very high pressure appliances. Except small appliances and motor vehicle air conditioning systems. What is EPA 608 Type III certification? - CORRECT ANSWER >>>>Persons who maintain, service, repair, or dispose of low pressure appliances.

What is EPA 608 Universal certification? - CORRECT ANSWER

Persons who maintain, service, repair, or dispose of both low and high pressure equipment, as well as appliances. HCFC's - CORRECT ANSWER >>>>HydroChloroFluoroCarbons What are HydroChloroFluoroCarbons? - CORRECT ANSWER Commonly known as HCFC's, they are a group of man-made compunds containing hydrogen, chlorine, fluorine, and carbon. A recovery cylinder must not be filled more than ___ % of it's capacity by weight? - CORRECT ANSWER >>>>80% How should refrigerant cylinders be shipped? - CORRECT ANSWER Up-right with proper DOT classification tags. What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with CFC's and HCFC's. - CORRECT ANSWER >>>>Polyolester HCFC's have very low atmospheric concentrations measured in parts per? - CORRECT ANSWER >>>>Trillion All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - CORRECT ANSWER 15% Mineral Oils are used with? - CORRECT ANSWER >>>>All CFC's Alkebenzene is used alone or as an additive for? - CORRECT ANSWER HCFC's (Will also work with CFC's) POE - CORRECT ANSWER >>>>Polyolester

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - CORRECT ANSWER >>>>November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - CORRECT ANSWER >>>>Recover all refrigerants. The objective of the Clean Air Act is to protect what? - CORRECT ANSWER >>>>The earth's stratosphere. HFC's - CORRECT ANSWER >>>>HydroFlouroCarbon's CFC's - CORRECT ANSWER >>>>ChloroFluoroCarbon's ODP - CORRECT ANSWER >>>>Ozone Depletion Potential Which international treaty agreement was the basis for Section 608? - CORRECT ANSWER >>>>The Montreal Protocol. Depletion of the ozone in the stratosphere is know to cause what 6 things? - CORRECT ANSWER >>>>1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? - CORRECT ANSWER >>>>These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act

as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? - CORRECT ANSWER >>>>November 15, 1993 On what date was technician certification required? - CORRECT ANSWER >>>>November 14, 1994 What date was CFC's phased out of production? - CORRECT ANSWER

December 31, 1995 What is EPA 608 Type I certification? - CORRECT ANSWER >>>>Persons who maintain, service, repair, or dispose of small appliances (containing 5 pounds of refrigerant (or less). Ozone Depletion Potential Which international treaty agreement was the basis for Section 608? - CORRECT ANSWER >>>>The Montreal Protocol. Depletion of the ozone in the stratosphere is know to cause what 6 things? - CORRECT ANSWER >>>>1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? - CORRECT ANSWER >>>>These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? - CORRECT ANSWER >>>>November 15, 1993 On what date was technician certification required? - CORRECT ANSWER >>>>November 14, 1994 What date was CFC's phased out of production? - CORRECT ANSWER >>>>December 31, 1995 What is EPA 608 Type I certification? - CORRECT ANSWER >>>>Persons who maintain, service, repair, or dispose of small appliances (containing 5 pounds of refrigerant (or less). What is the definition of a Type I Appliance? - CORRECT ANSWER >>>>A small appliance that is manufactured, charged, and hermetically sealed in a factory with 5 Lbs. of refrigerant or less. What is the definition of a Type II Appliance? - CORRECT ANSWER High pressure or very high pressure appliances except for small appliances and motor vehicle air conditioning. Refrigeration systems containing more than 5 Lbs. of high or very high pressure refrigerants. What is the definition of a Type III Appliance? - CORRECT ANSWER Low pressure equipment like low pressure chillers. All refrigerants are assumed to be a single chemical if they are numbered what? - CORRECT ANSWER >>>>1-399 and 600 and above.

What is an Azeotrope? - CORRECT ANSWER >>>>A mixture of two or more liquids in such a ratio that it's composition cannot be changed by vaporizing it. Azeotrope's are numbered what? - CORRECT ANSWER >>>>500 to 599 What is fractionation? - CORRECT ANSWER >>>>When the refrigerant leaks, it leaks out in different rates due to the different pressures. What is Temperature Glide? - CORRECT ANSWER >>>>When the temperature of the vaporizing refrigerant changes, even though the pressure remains the same. What are the two basic types of recovery devices? - CORRECT ANSWER

Self-Contained and System-Dependent. System-Dependent devices may only be used on appliances containing how much refrigerant? - CORRECT ANSWER >>>>15 Lbs of refrigerant or less What MUST be placed on a refrigerant cylinder being returned for reclaiming. - CORRECT ANSWER >>>>A refrigerant label. After completing the transfer of liquid refrigerant between a recovery unit and a refrigeration system, you should guard against what? - CORRECT ANSWER >>>>Trapping liquid refrigerant between the service valves. When pressurizing a system with nitrogen, you should always? - CORRECT ANSWER >>>>Charge through a pressure regulator. What are the three "R's"? - CORRECT ANSWER >>>>Recover, Recycle, and Reclaim.

In relation to the three "R's" what is Recover? - CORRECT ANSWER

To remove refrigerant in any condition from a system and store it in an external approved container. In relation to the three "R's" what is Recycle? - CORRECT ANSWER To clean refrigerant for reuse by seperating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter dryers. Can Recycled refrigerant be resold? - CORRECT ANSWER >>>>It cannot be re-sold but it can be re-used. In relation to the three "R's" what is Reclaim? - CORRECT ANSWER To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis. Can Reclaimed refrigerant be resold? - CORRECT ANSWER >>>>Yes, but must meet the standard set forth in ARI 700 before it can be resold. What chemical has been found in the stratosphere indicating ozone depletion? - CORRECT ANSWER >>>>Chlorine Monoxide (CLO) What are 5 Type I appliances? - CORRECT ANSWER >>>>1.Household refrigerators 2.Household freezers 3.Room air conditioners 4.Water Coolers 5.Drinking fountains What are 6 Type II appliances? - CORRECT ANSWER >>>>1.Walk-in coolers 2.Walk-in freezers

3.Reach-in refrigerators 4.Reach-in freezers 5.Residential & Commercial comfort cooling systems 6.Ice machines What is an example of a Type III appliance? - CORRECT ANSWER

Low pressure chiller. When is "Dew Point" used? - CORRECT ANSWER >>>>When calculating Superheat. When is "Bubble Point" used? - CORRECT ANSWER >>>>When calculating Sub-cooling. What does the EPA require on all Type I equipment that uses Class I or Class II refrigerants. - CORRECT ANSWER >>>>EPA requires a service aperature (process stub). TXV - CORRECT ANSWER >>>>Thermostatic Expansion Valve The EPA considers a major repair to be the replacement of what 4 items? - CORRECT 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? - CORRECT ANSWER The charging valve on the evaporator. What method is used to find suspected water tube leaks in chillers? - CORRECT 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? - CORRECT ANSWER >>>>130-Degrees F The typical design burst pressure for a rupture disc is what? - CORRECT ANSWER >>>>15 PSIG Excessive moisture collection in the purge unit can indicate what? - CORRECT ANSWER >>>>Tube Leakage Vacuum pumps need to be capable of pulling what level of vacuum? - CORRECT ANSWER >>>>500 microns All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - CORRECT ANSWER >>>>35% The most efficient method of leak checking a charged low-pressure system is to use? - CORRECT ANSWER >>>>Controlled hot water or heater blankets. Systems with open drive compressors are prone to leak where? - CORRECT ANSWER >>>>At the shaft seal. What does ASHRAE standard 15 require? - CORRECT 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 - CORRECT ANSWER >>>>Threshold Limit Value, Time Weighted Average

A-1 Group Refrigerants only require what? - CORRECT ANSWER

Oxygen Deprivation Sensor All "B" rated refrigerants require what? - CORRECT ANSWER "Refrigerant Specific" Mechanical Room Sensor. What are Cooling Towers? - CORRECT ANSWER >>>>They are heat removal devices used to transfer process waste heat to the atmosphere. 130-Degrees F The typical design burst pressure for a rupture disc is what? - CORRECT ANSWER >>>>15 PSIG Excessive moisture collection in the purge unit can indicate what? - CORRECT ANSWER >>>>Tube Leakage Vacuum pumps need to be capable of pulling what level of vacuum? - CORRECT ANSWER >>>>500 microns All refrigeration systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? - CORRECT ANSWER >>>>35% The most efficient method of leak checking a charged low-pressure system is to use? - CORRECT ANSWER >>>>Controlled hot water or heater blankets. Systems with open drive compressors are prone to leak where? - CORRECT ANSWER >>>>At the shaft seal. What does ASHRAE standard 15 require? - CORRECT 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 - CORRECT ANSWER >>>>Threshold Limit Value, Time Weighted Average A-1 Group Refrigerants only require what? - CORRECT ANSWER >>>>Oxygen Deprivation Sensor All "B" rated refrigerants require what? - CORRECT ANSWER >>>>"Refrigerant Specific" Mechanical Room Sensor. What are Cooling Towers? - CORRECT 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? - CORRECT ANSWER >>>>10 psig Enough vapor has entered the system and you may begin charging liquid refrigerant when the refrigerant saturation temperature increases to? - CORRECT ANSWER >>>>36F November 14, 1994 - CORRECT ANSWER >>>>What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? Memorize it, ya'll. - CORRECT ANSWER >>>>1989- Montreal Protocol July 1 1992- Violation to vent CFCs or HCFCs Nov 15 1993- Recovery/Recycling equipment must be certified and labeled by EPA AND Before this date recovery equipment needed to be capable of removing 80% of the refrigerant, w or wo compressor, or 4 in Hg

After this date recovery equipment needs to be capable of removing 90%, or 80% without working compressor, or 4 in Hg AND Required level of evacuation for Low Pressure appliances before this date was 25 inches Hg, after this date 25 mm Hg Nov 14 1994- Certification needed to service, maintain, or dispose of appliances with refrigerants AND Sale of CFC and HCFC refrigerants restricted to certified techs Nov 15 1995- Violation to vent HFCs Dec 31 1995- CFCs no longer produced 15% - CORRECT ANSWER >>>>Comfort cooling appliances containing more than 50 lbs of refrigerant must be repaired when the annual leak rate exceeds _____% 35% - CORRECT ANSWER >>>>Commercial and Industrial process refrigeration containing ore than 50 lbs of refrigerant must be repaired when the annual leak rate exceeds _____% 0 0 4 10 4 10 4 15 0 0 - CORRECT ANSWER >>>>Required Recovery Levels for Type II appliances, before and after 11/15/93: HCFC22 less than 200 lbs = B4-0 After- 0

HCFC22 more than 200 lbs= B4-4 After- 10 NonHCFC22 less than 200 lbs= B4-4 After 10 NonHCFC22 more than 200 lbs= B4 4 After 15 Very high pressure appliances= B4-0 After- 0 Recover all refrigerants. - CORRECT ANSWER >>>>Section 608 of the Federal Clean Air Act requires technicians to what? The earth's stratosphere. - CORRECT ANSWER >>>>The objective of the Clean Air Act is to protect what? HydroFlouroCarbon's - CORRECT ANSWER >>>>HFC's ChloroFluoroCarbon's - CORRECT ANSWER >>>>CFC's Ozone Depletion Potential - CORRECT ANSWER >>>>ODP The Montreal Protocol. - CORRECT ANSWER >>>>Which international treaty agreement was the basis for Section 608? 1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone - CORRECT ANSWER >>>>Depletion of the ozone in the stratosphere is known to cause what 6 things? These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. - CORRECT ANSWER

What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? November 15, 1993 - CORRECT ANSWER >>>>What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? November 14, 1994 - CORRECT ANSWER >>>>On what date was

Section 608 of the Federal Clean Air Act requires technicians to what? The earth's stratosphere. - CORRECT ANSWER >>>>The objective of the Clean Air Act is to protect what? HydroFlouroCarbon's - CORRECT ANSWER >>>>HFC's ChloroFluoroCarbon's - CORRECT ANSWER >>>>CFC's Ozone Depletion Potential - CORRECT ANSWER >>>>ODP The Montreal Protocol. - CORRECT ANSWER >>>>Which international treaty agreement was the basis for Section 608? 1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone - CORRECT ANSWER >>>>Depletion of the ozone in the stratosphere is known to cause what 6 things? These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. - CORRECT ANSWER >>>>What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? November 15, 1993 - CORRECT ANSWER >>>>What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? November 14, 1994 - CORRECT ANSWER >>>>On what date was technician certification required? December 31, 1995 - CORRECT ANSWER >>>>What date were CFC's phased out of production? The objective of the Clean Air Act is to protect what? HydroFlouroCarbon's - CORRECT ANSWER >>>>HFC's ChloroFluoroCarbon's - CORRECT ANSWER >>>>CFC's Ozone Depletion Potential - CORRECT ANSWER >>>>ODP The Montreal Protocol. - CORRECT ANSWER >>>>Which international treaty agreement was the basis for Section 608? 1.Crop losses 2.Increases in eye diseases 3.Skin Cancer 4.Reduced marine life 5.Deforestation 6.Increased ground level ozone - CORRECT ANSWER >>>>Depletion of the ozone in the stratosphere is known to cause what 6 things? These atoms attack Ozone Molecules causing the formation of Chlorine Monoxide (CLO), after colliding with another Ozone Molecule, causes 2 Oxygen (O2) molecules to be made & leaving an atom of chlorine to act as "Free Agent" starting the process over until 100,000 molecules of Ozone are destroyed by just one atom of chloride. - CORRECT ANSWER >>>>What happens when CFC or HCFC molecules get in the stratosphere & free atoms of Chlorine are set free? November 15, 1993 - CORRECT ANSWER >>>>What date was recovery equipment required to be certified by a lab, & achieve higher evacuation levels, & have low loss fittings? November 14, 1994 - CORRECT ANSWER >>>>On what date was technician certification required? December 31, 1995 - CORRECT ANSWER >>>>What date were CFC's phased out of production? Persons who maintain, service, repair, or dispose of small appliances (containing 5 pounds of refrigerant (or less). - CORRECT ANSWER What is EPA 608 Type I certification? Persons who maintain, service, repair, or dispose of high and very high pressure appliances. Except small appliances and motor vehicle air conditioning systems. - CORRECT ANSWER >>>>What is EPA 608 Type II certification? Persons who maintain, service, repair, or dispose of low pressure appliances. - CORRECT ANSWER >>>>What is EPA 608 Type III certification? Persons who maintain, service, repair, or dispose of both low and high pressure equipment, as well as appliances. - CORRECT ANSWER What is EPA 608 Universal certification? HydroChloroFluoroCarbons - CORRECT ANSWER >>>>HCFC's

Commonly known as HCFC's, they are a group of man-made compunds containing hydrogen, chlorine, fluorine, and carbon. - CORRECT ANSWER >>>>What are HydroChloroFluoroCarbons? 80% - CORRECT ANSWER >>>>A recovery cylinder must not be filled more than ___ % of it's capacity by weight? Up-right with proper DOT classification tags. - CORRECT ANSWER

How should refrigerant cylinders be shipped? Polyolester - CORRECT ANSWER >>>>What oil MUST be used with ALL HFC's for HVAC/Refrigeration but will also work with CFC's and HCFC's. Trillion - CORRECT ANSWER >>>>HCFC's have very low atmospheric concentrations measured in parts per? 15% - CORRECT ANSWER >>>>All cooling systems containing more than 50 lbs. of refrigerant must be repaired when the annual leak rate exceeds___? All CFC's - CORRECT ANSWER >>>>Mineral Oils are used with? HCFC's (Will also work with CFC's) - CORRECT ANSWER Alkebenzene is used alone or as an additive for? Polyolester - CORRECT ANSWER >>>>POE A small appliance that is manufactured, charged, and hermetically sealed in a factory with 5 lbs. of refrigerant or less. - CORRECT ANSWER What is the definition of a Type I Appliance? High pressure or very high pressure appliances except for small appliances and motor vehicle air conditioning. Refrigeration systems

containing more than 5 Lbs. of high or very high pressure refrigerants. - CORRECT ANSWER >>>>What is the definition of a Type II Appliance? Low pressure equipment like low pressure chillers. - CORRECT ANSWER

What is the definition of a Type III Appliance? 1 - 399 and 600 and above. - CORRECT ANSWER >>>>All refrigerants are assumed to be a single chemical if they are numbered what? A mixture of two or more liquids in such a ratio that it's composition cannot be changed by vaporizing it. - CORRECT ANSWER >>>>What is an Azeotrope? 500 to 599 - CORRECT ANSWER >>>>Azeotrope's are numbered what? When the refrigerant leaks, it leaks out in different rates due to the different pressures. - CORRECT ANSWER >>>>What is fractionation? When the temperature of the vaporizing refrigerant changes, even though the pressure remains the same. - CORRECT ANSWER >>>>What is Temperature Glide? Self-Contained and System-Dependent. - CORRECT ANSWER >>>>What are the two basic types of recovery devices? 15 Lbs of refrigerant or less - CORRECT ANSWER >>>>System- Dependent devices may only be used on appliances containing how much refrigerant? A refrigerant label. - CORRECT ANSWER >>>>What MUST be placed on a refrigerant cylinder being returned for reclaiming.