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EPA 609 TECHNICIAN CERTIFICATION EXAM LATEST
EXAM QUESTIONS AND CORRECT ANSWERS |
ALREADY GRADED A+ | VERIFIED ANSWERS |
LATEST VERSION
Any person who sells or distributes any Class I or Class II substance in a container of less than _________ of such refrigerant must verify that the purchaser is Properly Trained and 609 Certified and must retain a record. -- ----CORRECT ANSWER---------------20 pounds EPA does require a leak to be repaired prior to recharging a motor vehicle air conditioning system ------CORRECT ANSWER---------------False Which of the following are the causes of Ozone Layer Depletion: ------ CORRECT ANSWER---------------Hydrochlorofluorocarbons, Volcanic eruptions, and Chlorofluorocarbons ______ has developed standards that apply to the recovery and recycling of motor vehicle refrigerant as well as service guidelines for MVAC technicians. ------CORRECT ANSWER---------------SAE Ozone layer extends at Earth's altitude between _____ ------CORRECT ANSWER---------------7 and 30 miles HFC-134a contribute to which of the following: ------CORRECT ANSWER--- ------------Global Warming
The empty refillable refrigerant tank must be evacuated to a minimum vacuum of ______ of mercury ------CORRECT ANSWER--------------- 27 inches Refrigerants that contain chlorine but not hydrogen are stable ------ CORRECT ANSWER---------------True The internal pressure of a refrigerant cylinder with one ounce of liquid refrigerant is _______ full cylinder: ------CORRECT ANSWER--------------- exactly the same as R-152a refrigerant chemical compound does not composed of which of the following: ------CORRECT ANSWER---------------Chlorine The _________ has developed a standard for recovery and recovery/recycling machines that are to be used with flammable refrigerants. ------CORRECT ANSWER---------------SAE Which of the following are most stable in lower atmospheres of Earth: ------ CORRECT ANSWER---------------CFCs Under these safe disposal requirements as per the EPA, the final person in the disposal chain, is responsible for ensuring that the refrigerant is recovered from the equipment before the final disposal of the equipment: -- ----CORRECT ANSWER---------------True
Purity specification of new, recycled or reclaimed R-134a must meet _____ standard: ------CORRECT ANSWER---------------AHRI Standard 700 Lifetime of CFCs is believed to range from _____ years? ------CORRECT ANSWER---------------2 to 100 For determining the Ozone Depletion Potential ________ having been assigned a factor of 1? ------CORRECT ANSWER---------------CFC- 11 Ester-based synthetic oils can be mixed with other oils? ------CORRECT ANSWER---------------False R-134a is a chlorine-free refrigerant ------CORRECT ANSWER--------------- True Ozone layer absorbs and scatters ________ from the sun ------CORRECT ANSWER---------------ultraviolet light For determining the Ozone Depletion Potential ________ having been assigned a factor of 1 ------CORRECT ANSWER---------------CFC- 11 A refillable refrigerant cylinder must not be filled above ______ of its full capacity. ------CORRECT ANSWER---------------80%
Ozone at ground level and at Stratosphere is a harmful pollutant ------ CORRECT ANSWER---------------False Each chlorine ion can able to destroy ______ ozone molecules ------ CORRECT ANSWER---------------100, Lifetime of CFCs is believed to range from _____ years ------CORRECT ANSWER--------------- 20 - 100 An award of up to ______ may be paid to a person supplying information that leads to a penalty against a technician who is intentionally venting. -----
- CORRECT ANSWER---------------$10, Ester-based synthetic oils can be mixed with other oils ------CORRECT ANSWER---------------False Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants ------CORRECT ANSWER---------------Nov 15, 1995 MVAC systems being disposed must be evacuated to _____ of mercury before being scrapped ------CORRECT ANSWER---------------4 inches
Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that found in buses, also requires Section ______ certification ------ CORRECT ANSWER--------------- 608 Ozone depletion increases global warming ------CORRECT ANSWER-------- -------True Refrigerants are lighter than the air: ------CORRECT ANSWER--------------- False Stratosphere layer consists of about _____ of the available Ozone: ------ CORRECT ANSWER---------------90% Every refrigerant cylinder need not be protected by some type of pressure relief device: ------CORRECT ANSWER---------------False If a technician is already trained and certified to handle CFC-12, he has to be re-certified to handle HFC-134a ------CORRECT ANSWER--------------- False Which of the following refrigerants has high ozone-depletion potential: ------ CORRECT ANSWER---------------CFCs R-152a is a chemical compound composed of which of the following: (Multiple Answer Question) ------CORRECT ANSWER---------------Carbon, Hydrogen, Fluorine
R-134a refrigerant does pose a cancer or birth defects hazard ------ CORRECT ANSWER---------------False External Recovery Tanks must be evacuated to ______ of mercury before being put into service ------CORRECT ANSWER---------------27 inches Disposable Refrigerant Tanks, under _______ must be evacuated before being scrapped ------CORRECT ANSWER---------------20 pounds HFC-134a, is the refrigerant that replaced _______ in automotive air conditioning systems ------CORRECT ANSWER---------------R- 12 Which of the following has the Ozone Depletion Potential (ODP) value of 1 ------CORRECT ANSWER---------------CFC- 11 CFCs manufacture was discontinued as of _______ ------CORRECT ANSWER---------------January 1, 1996 ______ of stratospheric chlorine comes from ozone-depleting substances -- ----CORRECT ANSWER---------------82% MVAC systems need not be evacuated to a vacuum before servicing ------ CORRECT ANSWER---------------False
A floor tax also applies to anyone holding ______ or more of the regulated CFCs ------CORRECT ANSWER---------------400 lb. R-12 is a ______ type of refrigerant ------CORRECT ANSWER--------------- CFC HFCs contributes to the global warming: ------CORRECT ANSWER----------- ----True CFC refrigerants are chemically highly unstable: ------CORRECT ANSWER---------------False Ultraviolet radiation breaks down the CFCs and frees the chlorine ion ------ CORRECT ANSWER---------------True At present there is no restriction on the sale of HFC-134a ------CORRECT ANSWER---------------True Hydrofluorocarbons (HFCs) contributes to which of the following: ------ CORRECT ANSWER---------------global warming The thermodynamic properties of HFC-134a are similar to CFC- 12 ------ CORRECT ANSWER---------------True
The "ozone layer" consists of ozone in which part of the atmosphere: ------ CORRECT ANSWER---------------stratosphere As per the CAA, all records related to entities of MVAC system services must be maintained for ________ years ------CORRECT ANSWER----------- ---- 3 _______ has replaced CFC-12 in all automotive applications ------ CORRECT ANSWER---------------HFC-134a The primary cause of over-pressurization of refrigeration cylinder is due to overheating ------CORRECT ANSWER---------------True The color code for R-12 disposable refrigerant cylinders is ______ ------ CORRECT ANSWER---------------white Since _______, it has been mandatory to recycle HFC-134a as well as any other automotive refrigerant before returning to that MVAC or sold: ------ CORRECT ANSWER---------------Jan 29, 1998 Halons were completely phased out by 1994 ------CORRECT ANSWER----- ----------True R-134a is flammable at ambient temperatures and atmospheric pressures - -----CORRECT ANSWER---------------False
Average ozone concentration in Earth's atmosphere as a whole is only about ______ parts per million ------CORRECT ANSWER---------------0. Use of Carbon dioxide (R-744) refrigerant results into a ______ efficiency cycle: ------CORRECT ANSWER---------------much lower Recovery cylinders are painted yellow in the shoulder area and _____ down the side ------CORRECT ANSWER---------------12 inches Technicians who repair or service HFC-134a MVACs must be trained and certified by an EPA-approved organization ------CORRECT ANSWER-------- -------True Moisture content in recycled R-134a (HFC-134a) that has been directly removed from and intended to be returned to a mobile air-conditioning system cannot exceed _______ by weight ------CORRECT ANSWER-------- -------50 PPM R-134a disposable refrigerant cylinder is ________ color coded: ------ CORRECT ANSWER---------------light blue Disposable cylinders are manufactured to specifications established by: ---- --CORRECT ANSWER---------------DOT
Which of the following refrigerant has a molecular formula is C2H4F2: ------ CORRECT ANSWER---------------R-152a The AHRI standard now contains the new specification to limit unsaturated impurities in HFC-134a to a maximum level of ________ ------CORRECT ANSWER---------------40 ppm Refrigerants may be mixed in recovery cylinders: ------CORRECT ANSWER---------------False After reaching the required recovery vacuum on an system, if the system pressure _____, indicating that there is either refrigerant in liquid form, refrigerant trapped in the oil, or a leak in the system. ------CORRECT ANSWER---------------rises Refrigeration cylinders must be re-tested at ______ intervals ------ CORRECT ANSWER---------------five-year Ozone in the Earth's stratosphere is created by UV light striking _____ molecule ------CORRECT ANSWER---------------Oxygen R- 134a is a corrosive refrigerant: ------CORRECT ANSWER--------------- False
Refrigerants are lighter than air: ------CORRECT ANSWER---------------False Ozone is an unstable molecule: ------CORRECT ANSWER---------------True Chlorine reacts with ozone and converts ozone to: ------CORRECT ANSWER---------------Oxygen Ozone at ground level is a harmful pollutant ------CORRECT ANSWER------ ---------True Skin or eye contact with fluorocarbon refrigerants can result in: ------ CORRECT ANSWER---------------frostbite, irritation, or fatality The sale of small containers of refrigerant under _____., including the one pound cans, are restricted to only people certified in Section 609. ------ CORRECT ANSWER---------------20 lb Most halogenated compounds will decompose at room temperature: ------ CORRECT ANSWER---------------False Section 608 HVAC/R Technicians cannot buy refrigerant in quantities less than _______ ------CORRECT ANSWER---------------20 lbs
Which of the following refrigerants has minimum or zero ozone depletion potential: ------CORRECT ANSWER---------------HFCs HFC-152a MVAC systems are acceptable if MVAC systems must be designed to avoid concentrations in the passenger cabin that are above ______ for more than 15 seconds. ------CORRECT ANSWER--------------- 3.7% _______ is the key agent responsible for stratospheric ozone depletion -----
- CORRECT ANSWER---------------chlorine monoxide The per the AHRI standard unsaturated impurities in HFC-134a to be limited to a maximum level of _______: ------CORRECT ANSWER------------ ---40 ppm Prior to scrapping MVAC equipment the refrigerant must be recovered to a minimum vacuum of _______ of mercury ------CORRECT ANSWER---------- -----4 inches Since ________, it is no longer legal for CFCs to be manufactured or imported into the United States? ------CORRECT ANSWER--------------- January 1, 1996 Since _____, it is illegal to vent substitutes for CFC and HCFC refrigerants? ------CORRECT ANSWER---------------November 15, 1995
Ozone molecule consists of ______ atoms of oxygen? ------CORRECT ANSWER---------------Three CFCs are highly reactive in _____ of atmosphere? ------CORRECT ANSWER---------------Lower level Over the road refrigeration units and R-22 (HCFC) air conditioning, such as that found in buses, also requires Section ______ certification? ------ CORRECT ANSWER--------------- 608 Stratosphere layer consists of about _____ of the available Ozone? ------ CORRECT ANSWER---------------90% Moisture level in Recycled R-12 (CFC-12) that has been directly removed from, and intended to be returned to, a mobile air-conditioning system cannot exceed _______ PPM by weight? ------CORRECT ANSWER---------- ----- 15 Ozone depletion Increase global warming? ------CORRECT ANSWER------- --------True Non-condensables in a refrigeration system result in a _______ discharge pressure? ------CORRECT ANSWER---------------Higher
At high temperaturesCFC-12 can decompose to form _______? ------ CORRECT ANSWER---------------Both options are correct: hydrofluoric acid and hydrochloric acid If a technician is already trained and certified to handle CFC-12, he has to be re-certified to handle HFC-134a? ------CORRECT ANSWER--------------- False The Clean Air Act (CAA) of ______ directs EPA to establish requirements to prevent the release of ozone depleting substances? ------CORRECT ANSWER--------------- 1990 Refrigerants are lighter than the air? ------CORRECT ANSWER--------------- False External Recovery Tanks must be evacuated to ______ of mercury before being put into service? ------CORRECT ANSWER---------------27 inches Disposable Refrigerant Tanks, under _______ must be evacuated before being scrapped? ------CORRECT ANSWER---------------20 pounds ______ of stratospheric chlorine comes from ozone-depleting substances? ------CORRECT ANSWER---------------82% Which of the following refrigerants has high ozone-depletion potential? ------ CORRECT ANSWER---------------CFCs
