EPA 608 Practices Test

EPA 608 Practices Test A violation of the Clean Air Act, including improper record keeping, is subject to a penalty of a fine of up to _____ per day per violation: - $37,500 The ____connects the evaporator to the compressor in a refrigerant system: - Suction Line It is to be ensured that the refrigerant recovery cylinder is not filled to more than _____ of its capacity - 80 percent Which one of the following has higher Ozone Depletion Potential (ODP): - CFC TXV valve maintaining the pressure difference between _____ and _____ of the system - Condenser, Evaporator After recovering refrigerant from a sealed system, which of the following gas is used to pressurize (for leak checking) or blow debris out of the system: - Nitrogen gas A vacuum test could actually hide a leak: - True Vacuum test is not the efficient of leak detection. Which of the following substance present in refrigerant appliance results in corrosion: - Acidic At which of the following in refrigeration cycle changes a high-pressure vapor to a high-pressure liquid by rejecting heat from the refrigerant: - Condenser According to the EPA, which of the following is not most effective way to detect the general area of a small leaks: - fluorescent Indicator A recovery cylinder can maximum store _____ refrigerants: - One Recovered refrigerant are stored in tanks are painted _____ : - Gray with yellow tops EPA has divided refrigerated appliances into _____ groups - Five If your recovery unit does not have a sub-cooling feature recovery rate will be _____ : - Faster One chlorine ion can able to destroy _______ ozone molecules: 1000 - 100,000 Refrigerant cannot be called reclaimed unless it meets the ______ purity standard: - ARI-700 Only _____ refrigerant can be transferred or sold to another individual - Reclaimed During each vacuum decay test, it is observed that the system after creating the vacuum the pressure of the system increases greater than at 0 psig, Then: - The refrigerant could be trapped in the system Lifetime of CFCs is believed to range from ______ : - 20 to 100 years Halons were completely phased out by ______ : - 1994 Presence of which of the following element will reduce the stability of the Ozone Depletion Substances: - Chlorine _____ breaks down the CFCs and frees the chlorine ion: - Ultraviolet radiation Motor Vehicle Air Conditioning (MVAC) service technicians are governed under a _____ section: - 609 R-134a belongs to which of the following refrigerant group: - HFC This suction line filter drier should be located just upstream of the _____ inlet: - Compressor The ______ connects the condenser to the expansion device: - Liquid line The color of low-pressure port of the manifold that is connected to the low side of the system - Blue Recovery and recycling equipment intended for use manufactured after _____ must be certified to meet the requirements of ARI 740: - Nov 15, 1993 Refrigeration technicians who violate the Clean Air Act may: - Lose their EPA certification, Required to appear in federal court, Be fined Which of the refrigerant is used in low pressure refrigerated appliance: - R-123 True or False: Ozone is a unstable molecule: - True True or False: Recovered refrigerant can be returned to the same system or other systems owned by the same person without restriction: - True The diameter of the liquid line must be as ______ as possible to minimize the total refrigerant charge: - Small If the label identifying the refrigerant is missing, then which of the following method is used to identify the type of refrigerant: - Pressure-Temperature method Nitrogen react with hydrogen to form which of the following - Ammonia Which of the following is used to minimize the leakage of refrigerant while checking: - Self-sealing hoses & Hand valves Which type of leak detector works by drawing the vapor into the system and heating it: - Electronic leak detector Two refrigerants are not allowed to collect into one recovery cylinder because: - Recovery back of two refrigerants from mixture is not possible If the vacuum pump used is too large, water removal will become: - Difficult As the pressure drops water cools down and freeze makes difficult to extract CFC-11 and CFC-12 Ozone depleting substances constitutes of ______ of stratospheric chlorine - 51% Flushing agents shall not be introduced into which of the following in a refrigeration system: - Compressor Flushing agent will removes lubrication oil of compressor A Type I technician primarily works on - small appliances such as domestic refrigerators, window air conditioners, PTACs and vending machines A Type II technician primarily works on - equipment using a high pressure refrigerant such as HCFC-22. A Type II technician primarily works on equipment - equipment includes residential air conditioners and heat pumps, supermarket refrigeration and process refrigeration. A Type III technician primarily works on equipment - using a low pressure refrigerant such as HCFC-123 or CFC-11. HCFC-123 or CFC-11 refrigerants systems are (low/high) pressure? - Low pressure What kind of refrigerants systems are chillers? - Low pressure Any candidate passing all three of these EPA types - is certified as Universal. Naturally occurring gas molecule that is made up of three oxygen atoms (O3). - Ozone At ground level, ozone is considered "(bad/good)" and is a pollutant that causes significant health risks as well as damaging vegetation - Bad The ozone that occurs in the upper atmosphere or stratosphere is considered "good" ozone. This "good" ozone in the stratosphere is a layer that extends about ___________ miles above earth and creates a protective shield for Earth from the sun's harmful ultraviolet (UV) rays. - 6 to 30 miles above earth Depletion of ozone allows more of the sun's harmful UV rays to reach the earth resulting in the following problems: - Increased temperature of the earth Increased cases of skin cancer Increased numbers of cataracts in the eyes Increased ground level ozone Crop and vegetation loss Reduced marine life Ozone can be destroyed by________ and _______ atoms emitted into the atmosphere. - chlorine and bromine