EPA 609 Practice Questions With Complete Solutions
MVAC systems being disposed must be evacuated to _____ of mercury before being scrapped correct answer: 4 inches R-134a is a chlorine-free refrigerant correct answer: True Ozone Layer absorbs and scatters____ light from the sun correct answer: Ultraviolet light Each chlorine ion is able to destroy ______ ozone molecules correct answer: 100 thousand Ozone Depletion Potential ofb________ having been assigned a factor of 1 correct answer: CFC-11 Ozone at ground levelof the Stratosphere is a harmful pollutant. T or F? correct answer: True A refillable refrigerant cylinder must not be filled above ______ of its full capacity. correct answer: 80% Lifetime of CFCs is believed to range from _____ years correct answer: 20 to 100 yrs Ester-based synthetic oils can be mixed with other oils. T or F? correct answer: False
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epa 609 practice questions with complete solutions