EPA - Environmental Protection Agency: Q’s And A’s
After 1995, supplies of CFC refrigerants will come from Right Ans -
Recovery and recycling
A compound pressure gauge for the low side of the system measures pressure
in Right Ans - psig and inches of mercury (Hg)
A synthetic lubricant presently used with ternary blends containing HCFC's
Right Ans - Alkybenzenes
Ester based oils can be mixed with Right Ans - No other oils
Chloroflourocarbons (CFC's) and Hydrochloroflourocarbos(HCFC's) have the
following similarity Right Ans - They must be recovered before opening or
disposing of an appliance.
To RECOVER refrigerant is to Right Ans - remove refrigerant in any
condition from a system and store it in external container without testing or
processing it in any way.
System Dependent recovery devices Right Ans - captures refrigerant with
the aid of the pressure of the gas in the system and/or the compressor of the
appliance itself
A refillable cylinder must bot be filled above? Right Ans - 80%
When scrapping a disposable cylinder, the pressure should be reduced at least
to: Right Ans - 0 psig
The definition of RECYCLE is: Right Ans - to clean refrigerant for reuse by
oil separation and single or multiple passes through filter-driers.
Refrigerant cylinders should be Right Ans - All of the above
what is an azeotropic mixture of refrigerants? Right Ans - the mixture
combines and becomes a third refrigerant with its own separate and
individual characteristics
, Beginning November 14, 1994, the sale of refrigerants and the ability to
service and repair refrigeration and air conditioning equipment will be
Right Ans - restricted to persons certified with refrigerant recovery
Under EPA regulations, what standard must reclaimed refrigerant meet
before it can be resold? Right Ans - ARI 700
You have to check a unit which has lost a complete charge. Which gas would
cause the least damage to the environment? Right Ans - dry nitrogen only
A refrigerant label is placed on a Right Ans - refrigerant cylinder being
retired for reclaiming
A refrigerant oil that is hygroscopic Right Ans - has a high affinity for water
which refrigerant is an HFC Right Ans - R-134a
which refrigerant is an HCFC Right Ans - R-22
which refrigerant is a CFC Right Ans - R-500
which refrigerant contains no chlorine Right Ans - R-134a
Whenever dry nitrogen is used in service and installation practice, what item
is of most importance for SAFETY Right Ans - That a relief valve is inserted
in the line downstream from the regulator
To determine the safe pressure for leak-testing a system, you should use:
Right Ans - low side test pressure indicated on the system data or name plate
Why must cylinders designated "refillable" by the department of
transportation be sued for transporting recovered refrigerant? Right Ans -
to meet safety requirements
To work on small appliances after Nov. 14, 1994, technicians must be certified
as Right Ans - Type I, Universal
The size of a vacuum pump and the size of the vacuum hose line will: Right
Ans - determine dehydration time
After 1995, supplies of CFC refrigerants will come from Right Ans -
Recovery and recycling
A compound pressure gauge for the low side of the system measures pressure
in Right Ans - psig and inches of mercury (Hg)
A synthetic lubricant presently used with ternary blends containing HCFC's
Right Ans - Alkybenzenes
Ester based oils can be mixed with Right Ans - No other oils
Chloroflourocarbons (CFC's) and Hydrochloroflourocarbos(HCFC's) have the
following similarity Right Ans - They must be recovered before opening or
disposing of an appliance.
To RECOVER refrigerant is to Right Ans - remove refrigerant in any
condition from a system and store it in external container without testing or
processing it in any way.
System Dependent recovery devices Right Ans - captures refrigerant with
the aid of the pressure of the gas in the system and/or the compressor of the
appliance itself
A refillable cylinder must bot be filled above? Right Ans - 80%
When scrapping a disposable cylinder, the pressure should be reduced at least
to: Right Ans - 0 psig
The definition of RECYCLE is: Right Ans - to clean refrigerant for reuse by
oil separation and single or multiple passes through filter-driers.
Refrigerant cylinders should be Right Ans - All of the above
what is an azeotropic mixture of refrigerants? Right Ans - the mixture
combines and becomes a third refrigerant with its own separate and
individual characteristics
, Beginning November 14, 1994, the sale of refrigerants and the ability to
service and repair refrigeration and air conditioning equipment will be
Right Ans - restricted to persons certified with refrigerant recovery
Under EPA regulations, what standard must reclaimed refrigerant meet
before it can be resold? Right Ans - ARI 700
You have to check a unit which has lost a complete charge. Which gas would
cause the least damage to the environment? Right Ans - dry nitrogen only
A refrigerant label is placed on a Right Ans - refrigerant cylinder being
retired for reclaiming
A refrigerant oil that is hygroscopic Right Ans - has a high affinity for water
which refrigerant is an HFC Right Ans - R-134a
which refrigerant is an HCFC Right Ans - R-22
which refrigerant is a CFC Right Ans - R-500
which refrigerant contains no chlorine Right Ans - R-134a
Whenever dry nitrogen is used in service and installation practice, what item
is of most importance for SAFETY Right Ans - That a relief valve is inserted
in the line downstream from the regulator
To determine the safe pressure for leak-testing a system, you should use:
Right Ans - low side test pressure indicated on the system data or name plate
Why must cylinders designated "refillable" by the department of
transportation be sued for transporting recovered refrigerant? Right Ans -
to meet safety requirements
To work on small appliances after Nov. 14, 1994, technicians must be certified
as Right Ans - Type I, Universal
The size of a vacuum pump and the size of the vacuum hose line will: Right
Ans - determine dehydration time
