What is when moisture exists in an operating system?
100
If an oil is hygroscopic it means that it
What is readily absorbs moisture?
100
Disposable refrigerant containers are used for ______ refrigerant
What is virgin?
100
If corrosion is found within the body of a releif valve, the valve must be:
What is replaced.
100
A system is considered dehydrated when
What is when a vacuum idicator shows you have reached and held the required finished vacuum.
200
THIS, can not occur
What is over-evacuation of a system?
200
Recovery, evacuation and charging are
What is the center port on a typical three port manifold gauge?
200
An example of an HCFC refrigerant is
What is R-22?
200
Never use oxygen or compressed air to pressurize a system because
What is mix with compressor oil or some refrigerants it could explode?
200
Measuring the system's final vacuum is always done with:
What is the system is isolated and the vacuum pump off.
300
Ambient temperature, the size of the equipment being evacuated and the amount of moisture in a system
What are factors that affect the speed of evacuation?
300
This, is the process of removing refrigrant in any condition from a system and storing it in an external container without testing it in any way
What is recovery?
300
It is necessary to place a refrigerant label on:
What is a refrigerant cylinder which is being returned for reclaiming?
300
According to ASHRE's 1992 refrigerant safety classification, what is the most safe?
What is A-1?
300
A system is dehydrated to
What is remove water and water vapor?
400
the vacuum gauge should be as far away from the pump as possible
What is to obtain an accurate reading of the sytem during evacuation?
400
True of false, dry nitrogen and R-22 causes the least damage to the environment
What is false? Dry nitrogen alone cause the least damage.
400
You should attach DOT classifications tags.
What is when transportating cyclinders containing used refrigerant?
400
To scrap a disposable cylinder, the internal cyclinder pressure should be reduced to at least
What is 0 psig?
400
As of this date, mandatory use of certified recycling equipment when servicing automotive air conditioning.
What is January 1, 1992
500
THIS, will slow the process of recovery
What is refrigerant recovery during low ambient temperatures?
500
According to the EPA, this is considered the most effective for locating the general area of a small leak.
What is an electronic or ultrasonic tester?
500
After 1995, any supplies of CFC refrigerant to service existing units in the USA can only come from:
What is recovery and recycling?
500
This may cause heart irregularities and/or unconsciousness
What is refrigerant vapors or mist being inhaled because:
500
As of this date refrigerant recovery devices must be equipped with low loss fittings, which are close automatically when disconnected to prevent loss of refrigerant from hoses.