type II

the condition and state of the refrigerant leaving the accumulator of a system is

a ___________ type refrigerant has different saturated vapor pressures at the same temperature in the evaporator and in the condenser of the refrigeration system. the term used to describe this condition is called temperature glide

deep vacuums used for evacuation and dehydration of systems are measured in

with the exception of industrial processes and commercial refrigeration if a system with a charge of 50 pds or more leaks at an annual rate of 15% the owner must

the only refrigerant approved by the EPA to be used as a trace gas with nitrogen to test for a leak (except for systems using R-134a is

with an air cooled condenser on the roof of a two story building and the evaporator on the first floor it would be best to start recovery from

traces of oil around the sight glass, machined, or brazed joints of a refrigeration system may be an indication of

one of the easiest ways to identify the type refrigerant in a system is to

front seating the three way suction service valve will close the

when using a refrigerant as a trace gas to locate a leak, which refrigerant should you use?

type II clasification as defined by EPA applies to what equipment?

under the exceptions to required evacuation levels an appliance can be evacuated to 0 psig when

the condition and state of the refrigerant in the condenser is

since___________ it has been illegal to knowingly release refrigerants during the service maintenance repair and disposal refrigerated appliances

the recovery of refrigerant in the vapor phase will minimize the loss of

refrigerant vapors or mist in high concentrations should not be inhaled since they have been demonstrated to cause

EPA defines a major repair as replacing the

The EPA will pay awards of up to _________ to any person who furnishes information which leads to criminal conviction of anyone commiting a violation of the clean air act

the excise tax on refrigerants applies to ____ refrigerants

True or False: service on a small appliance can be performed by a technician with type II and type III certifications or both
True False

at an ambient temperature of 80°F the pressure in a cylinder containing R-22 will be approximately

refrigerant should be recovered first as a

a condition of excessive superheat could be an indication of

non condensibles in an air conditioning or refrigeration system will

you have just recovered some R-22 and the next service call requires you to recover R-502 what must you do before starting recovery of the R-502

which refrigerants can be used for leak detection as a trace gas and pressurized with nitrogen?

type II certification applies to

True or False:
R-134a is a drop in replacement for R-12
True False

True or False: if nitrogen is not available to use with a trace gas to test for a leak compressed air may be used as a substitute
True False

every refrigerating system shall be protected from high pressure by a ___________

the oils that should be used with HFC-134a refrigeration applications are

the color code for recovery vessels is

industrial process and commercial refrigeration equipment with an annual leak rate of _____% requires repairs under spa regulations

at 70° ambient temperature R-22 will have a saturated vapor pressure of

what type of refrigerant would you expect to find in a residential air conditioning system

many larger refrigeration compressors use an open type compressor which part of the compressor is likely to leak if the unit is shut down for long periods?

which refrigerant requires its own special set of hoses gauges vacuum pump recovery machine and oil containers?

pressure relief valves must never be

system dependent recovery equipment can not be used when

the recovery process can be speeded up by

recovery units manufactured before november 15 1993 are required to reach recovery levels of _______ on an R-22 appliance if the charge is more than 200 pounds

recovery units manufactured before november 15 1993 are required to reach recovery levels of _______ on an R-22 appliance if the charge is less than 200 pounds

the required level of evacuation for recovery equipment manufactured after november 15 1993 on a system containing less than 200 pds of R-12 is

recovery units manufactured after november 15 1993 are required to reach recovery evacuation levels of _______ on an appliance using other high pressure refrigerants if the charge is more than 200 pds

it a technicians recovery equipment was manufactured before november 15 1993 he must evacuate a refrigeration system containing 10 pds of R-500 to

as defined by ASHRAE standard 15 a sensor and alarm are required for A1 refrigerants to sense

1 mm of mercury (Hg)=0.039 inches of mercury=_________microns

which of the following statements is NOT true of EPA approved recovery equipment manufactured after november 15 1993
A. it must meet EPA standards
B. it must be able to handle more than one refrigerant 
C. it must meet more stringent recovery requirements than equipment manufactured before november 15 1993
D. it must be equipped with low-loss fittings

when evacuating a vapor compression system the vacuum pump must be capable of pulling vacuum of _______ microns

refrigerants with a boiling point of between -50 and 10+ degrees celsius are defined by the EPA as refrigerants: 12,22,114,132a,500 and 502 the refrigeration unit using any of these gases is called