Test Bank For Commercial Refrigeration for Air
Conditioning Technicians
What is the significance of the Montreal Protocol? - ANSWER The Montreal
Protocol IS AN International agreement that established target dates for the phase
out of ozone depleting substances.
What is the possible fine for violating the Clean Air Act? - ANSWER $97,229 per
incident per day
List the major provisions of Title VI, section 608 of the 1990 clean air act. - ANSWER
A prohibition on venting ozone depleting refrigerants Technician certification
Restrictions on the sale of ozone depleting refrigerants Reclaimed refrigerant
standards
Certification of recycling and recovery equipment Refrigerant recovery levels
Repair of substantial leaks in equipment with a charge greater than 50 pounds. Safe
disposal of appliances containing ozone-depleting refrigerant
Record keeping for technicians, employers, wholesalers, and equipment owners
List the exceptions to the ban on venting ozone depleting refrigerant. - ANSWER
"De minimis" quantities of refrigerant released in the course of making good faith
attempts to recapture and recycle or safely dispose of refrigerant.
Refrigerants emitted in the course of normal operation of air-conditioning and
refrigeration equipment.
Small releases of refrigerant that result from purging hoses or from connecting or
disconnecting hoses to charge or service appliances will not be considered violations
of the prohibition on venting.
List the four parts of the EPA Certification exam. - ANSWER Core
Type I - small appliances
Type II - high pressure and very high pressure appliances Type III - low pressure
appliances
What is the definition of a small appliance? - ANSWER A small appliance is defined
as a product that is fully manufactured, charged, and hermetically sealed in a factory
with five pounds or less of refrigerant.
List the recovery levels for Type I, small appliances. - ANSWER 80% of the charge
if the recovery device is manufactured before November 15, 1993.
80% if the recovery device is manufacture after November 15, 1993 and the
compressor in the appliance in non-operational.
90% if the recovery device is manufacture after November 15, 1993 and the
compressor in the appliance in operational.
4" hg vacuum for active recovery devices
, What is a non-pressurized container? - ANSWER A non-pressurized container
does not have a pressure greater that 0 psig even after putting refrigerant in it. It
does this by expanding in volume as the refrigerant is added.
What is the difference between system-dependent recovery devices and self-
contained recovery devices? - ANSWER A system dependent recovery device
depends on the system from which the refrigerant is being recovered to help move
the refrigerant. Self contained recovery devices do not rely on the system the
refrigerant is being recovered from for their operation. They typically are small,
specialized condensing units.
List the recovery levels for Type II systems using a recovery system manufactured
on or after November 15, 1993. - ANSWER 0 psig for very high pressure
refrigerants
0 psig for systems with less than 200 pounds of a high pressure refrigerant
10" hg vacuum for systems with 200 pounds or more of a high pressure refrigerant
10" hg vacuum for medium pressure refrigerants with less than 200 pounds 15" hg
vacuum for medium pressure refrigerants with more than 200 pounds
List the recovery levels for Type III systems? - ANSWER 25 mm absolute pressure
when using a recovery unit built after November 15, 1993
What is the advantage of beginning with liquid recovery whenever possible? -
ANSWER Faster refrigerant recovery. The system refrigerant does not drop in
pressure and temperature as quickly.
Why should liquid always be recovered first from chillers? - ANSWER To keep from
freezing the water in the chiller tubes.
Describe the connection setup for push-pull liquid recovery. - ANSWER The liquid
line service valve or king valve is connected to the liquid valve on the recovery
cylinder. The vapor valve on the recovery cylinder is connected to the suction side,
or inlet, of the recovery machine. The discharge, or outlet, of the recovery machine is
connected to the discharge service valve on the compressor.
Describe the connection setup for vapor recovery. - ANSWER The gauges are
connected as they normally are, with the high side manifold hose connected to the
liquid line service valve and the low side manifold hose connected to the suction
service valve. The center manifold hose connects to the inlet of the recovery unit and
the outlet of the recovery unit connects to the vapor port on the recovery cylinder.
List methods of speeding up refrigerant recovery. - ANSWER If possible, operate
the system before beginning refrigerant recovery. Use the large diameter, short
length hoses
Recover liquid first.
Begin recovery at the lowest available access point.
Heat the system from which refrigerant is being recovered. Cool the cylinder the
refrigerant is going into.
Recover from both sides of the system during vapor recovery.
Conditioning Technicians
What is the significance of the Montreal Protocol? - ANSWER The Montreal
Protocol IS AN International agreement that established target dates for the phase
out of ozone depleting substances.
What is the possible fine for violating the Clean Air Act? - ANSWER $97,229 per
incident per day
List the major provisions of Title VI, section 608 of the 1990 clean air act. - ANSWER
A prohibition on venting ozone depleting refrigerants Technician certification
Restrictions on the sale of ozone depleting refrigerants Reclaimed refrigerant
standards
Certification of recycling and recovery equipment Refrigerant recovery levels
Repair of substantial leaks in equipment with a charge greater than 50 pounds. Safe
disposal of appliances containing ozone-depleting refrigerant
Record keeping for technicians, employers, wholesalers, and equipment owners
List the exceptions to the ban on venting ozone depleting refrigerant. - ANSWER
"De minimis" quantities of refrigerant released in the course of making good faith
attempts to recapture and recycle or safely dispose of refrigerant.
Refrigerants emitted in the course of normal operation of air-conditioning and
refrigeration equipment.
Small releases of refrigerant that result from purging hoses or from connecting or
disconnecting hoses to charge or service appliances will not be considered violations
of the prohibition on venting.
List the four parts of the EPA Certification exam. - ANSWER Core
Type I - small appliances
Type II - high pressure and very high pressure appliances Type III - low pressure
appliances
What is the definition of a small appliance? - ANSWER A small appliance is defined
as a product that is fully manufactured, charged, and hermetically sealed in a factory
with five pounds or less of refrigerant.
List the recovery levels for Type I, small appliances. - ANSWER 80% of the charge
if the recovery device is manufactured before November 15, 1993.
80% if the recovery device is manufacture after November 15, 1993 and the
compressor in the appliance in non-operational.
90% if the recovery device is manufacture after November 15, 1993 and the
compressor in the appliance in operational.
4" hg vacuum for active recovery devices
, What is a non-pressurized container? - ANSWER A non-pressurized container
does not have a pressure greater that 0 psig even after putting refrigerant in it. It
does this by expanding in volume as the refrigerant is added.
What is the difference between system-dependent recovery devices and self-
contained recovery devices? - ANSWER A system dependent recovery device
depends on the system from which the refrigerant is being recovered to help move
the refrigerant. Self contained recovery devices do not rely on the system the
refrigerant is being recovered from for their operation. They typically are small,
specialized condensing units.
List the recovery levels for Type II systems using a recovery system manufactured
on or after November 15, 1993. - ANSWER 0 psig for very high pressure
refrigerants
0 psig for systems with less than 200 pounds of a high pressure refrigerant
10" hg vacuum for systems with 200 pounds or more of a high pressure refrigerant
10" hg vacuum for medium pressure refrigerants with less than 200 pounds 15" hg
vacuum for medium pressure refrigerants with more than 200 pounds
List the recovery levels for Type III systems? - ANSWER 25 mm absolute pressure
when using a recovery unit built after November 15, 1993
What is the advantage of beginning with liquid recovery whenever possible? -
ANSWER Faster refrigerant recovery. The system refrigerant does not drop in
pressure and temperature as quickly.
Why should liquid always be recovered first from chillers? - ANSWER To keep from
freezing the water in the chiller tubes.
Describe the connection setup for push-pull liquid recovery. - ANSWER The liquid
line service valve or king valve is connected to the liquid valve on the recovery
cylinder. The vapor valve on the recovery cylinder is connected to the suction side,
or inlet, of the recovery machine. The discharge, or outlet, of the recovery machine is
connected to the discharge service valve on the compressor.
Describe the connection setup for vapor recovery. - ANSWER The gauges are
connected as they normally are, with the high side manifold hose connected to the
liquid line service valve and the low side manifold hose connected to the suction
service valve. The center manifold hose connects to the inlet of the recovery unit and
the outlet of the recovery unit connects to the vapor port on the recovery cylinder.
List methods of speeding up refrigerant recovery. - ANSWER If possible, operate
the system before beginning refrigerant recovery. Use the large diameter, short
length hoses
Recover liquid first.
Begin recovery at the lowest available access point.
Heat the system from which refrigerant is being recovered. Cool the cylinder the
refrigerant is going into.
Recover from both sides of the system during vapor recovery.
