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UPDATED EPA 608 ( ) Latest Update - 150 Questions and 100% Verified Correct Answers Guaranteed A+
a major repair involves the removal of what? - CORRECT ANSWER: Auxiliary heat
exchanger coil.
a single chlorine atom can destroy how many ozone molecules? - CORRECT
ANSWER: 100,000.
a strong odor is around during the recovery process. what is most likely the cause of
this? - CORRECT ANSWER: A compressor burnout.
after the refrigerant has been recovered, what can be used to flush the system? -
CORRECT ANSWER: Nitrogen.
air will cause (blank) discharge pressures in a refrigeration system. - CORRECT
ANSWER: Higher.
all equipment must be equipped with what type of fittings? - CORRECT ANSWER: Low- loss fittings.
All refrigeration recovery cylinders must be (blank) approved. - CORRECT ANSWER: DOT.
an explosion can occur if (blank) is vented in an enclosed environment? - CORRECT
ANSWER: Hydrogen.
an overcharged system can cause what? - CORRECT ANSWER: High side pressure
increase.
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applying heat, with a heat gun, to the compressor, does what? - CORRECT ANSWER:
can help vaporize any trapped liquid refrigerant during recovery.
before beginning a refrigerant recovery procedure, it is necessary to know what? -
CORRECT ANSWER: The type of refrigerant that is in the system.
before charging a new system with refrigerant, what should be done? - CORRECT
ANSWER: Pressurize with nitrogen (classified as an inert gas) and leak checked.
can a hermetic compressor be operated when the system is in a deep vacuum? -
CORRECT ANSWER: NO.
can refrigerants be mixed in a recovery tank? - CORRECT ANSWER: NO.
can the compressor compress liquid? - CORRECT ANSWER: NO.
can you release (vent) vapor from the top of a graduated charging cylinder? -
CORRECT ANSWER: It can NOT be vented, always recovered.
CFCs will not be manufactured in the United States after what year? - CORRECT
ANSWER: 1995.
charging an R-410A system until the sight glass is clear may result in what? -
CORRECT ANSWER: Compressor damage.
System overcharge.
depletion of the ozone is known to cause what 6 things? - CORRECT ANSWER: Crop
loss.Increased eye disease.Skin cancer.Deforestation. 2 / 3
Reduced marine life.Increased ground level ozone.
does refrigerant go out of the system in low pressure systems or does air and moisture go in? - CORRECT ANSWER: Air and moisture enter the refrigerant system because it operates in a vacuum.
EPA regulations state that removal of which component constitutes a "major repair"? -
CORRECT ANSWER: Compressor.
fastest method to recover refrigerant is when it is in what state? - CORRECT ANSWER: Liquid state.
HFC's will be phased out by what year? - CORRECT ANSWER: 2020.
how can a technician determine when it is safe to start charging with liquid refrigerant? -
CORRECT ANSWER: Refrigerant saturation temperature reaches 36*F or the vapor
pressure reaches 16.9" Hg vacuum.
how can you check if there is excess air / non-condensables in the tank? - CORRECT ANSWER: Checking the pressure inside the recovery tank. Reference the pressure / temperature chart.
how can you release trapped refrigerants in the oil during recovery? - CORRECT
ANSWER: Heat and tap the compressor with a mallet.
how can you speed up the vapor recovery process? - CORRECT ANSWER: A heater on
the recovery vessel side will help to evacuate the vapor faster.
how many miles above the Earth's surface does the ozone layer in the stratosphere
extend? - CORRECT ANSWER: 31 miles.
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