Stratospheric ozone depletion is a _________ problem: - CORRECT
ANSWER >>>>Global
,2|Page
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-134a
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
,3|Page
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
, 4|Page
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
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