On manifold gauges the low pressure gauge is color coded?
What is blue
100
Portable refillable tanks or containers used to ship recovered refrigerants must meet what standards
What is Department of Transportation (DOT)
100
Soap bubble testing is used when?
What is pinpointing refrigerant leaks
100
To remove ice from sight glasses or viewing glasses this is used
What is alcohol spray
100
Halons were completely phased out by this year
What is 1994
200
Best proof that CFCs are in the Stratosphere
What is measurement of CFCs in air samples
200
Anyone who recovers refrigerant during maintenance, service or repair of small appliances must be certified as either a Universal Technician or a:
What is Type 1 Technician
200
Recovered refrigerant may contain oils, moisture, and
What is acids
200
On low pressure chillers moisture typically enters the refrigerant system around areas with these
What is gaskets or fittings
200
If using a recovery machine manufactured before this date you must evacuate any low pressure appliance to 25in of Hg vacuum before making a major repair
What is November 15, 1993
300
Recovery equipment that relies upon the pressure of refrigerant in the appliance would be considered:
What is system-dependent
300
If a large leak of refrigerant occurs in an enclosed area and no self contained breathing apparatus is available, then the technician should?
What is vacate and ventilate the spill area
300
When evacuating a system the use of a large vacuum pump could cause what to freeze?
What is trapped water?
300
Where the purge unit takes its suction from
What is the top of the condenser
300
Since this date the EPA requires systems that contain 50 pounds or more of refrigerant to have “substantial leaks” repaired within 30 days.
What is June 14, 1993
400
A ternary refrigerant blend is a how many part mixture
What is 3 part
400
Before beginning a refrigerant recovery procedure it is ALWAYS necessary to determine:
What is the type of refrigerant in the system
400
A routine maintenance task which must be performed on refrigerant recycling machines is to change the filter and?(if any)
What is compressor oil(if any)
400
A hydrostatic tube test kit is used for this
What is determine if a tube leaks
400
Recovery devices manufactured after this date and are used for the recovery of refrigerant from small appliances must be capable of recovering 90 percent of the refrigerant when the compressor is operating.
What is November 15, 1993
500
Systems charged with R-410A should be leak checked with?
What is pressurized nitrogen
500
When you connect your service manifold to check system pressures, it's always a good idea to?
What is use equipment such as hand valves or self sealing hoses to to minimize any release
500
On refrigeration units that use an open compressor the (blank) is most likely to leak if the unit is not used for several months
What is the rotating shaft seal
500
A rupture disk on a recovery vessel for low pressure refrigerants relieves at this psig
What is 15
500
EPA sets regulations under Section 608 of the Clean Air Act that establish a recycling program for ozone-depleting refrigerants recovered during the servicing and disposal of air-conditioning or refrigeration equipment. Together with the prohibition on venting during servicing, repair, and disposal of class I and class II substances that took effect on this date