CFC Core
CFC Core
CFC Core
Core
CFC Core
100
Equal to or larger than vacuum pump inlet
When evacuating a system, the hoses should be
100
the size of the equipment being evacuated. the ambient temperature. the amount of moisture in the system.
What are factor(s) affects the speed of evacuation?
100
100,000
What is each chlorine atom in the stratosphere can destroy ____ ozone molecules.
100
increases in human skin cancer
What is one of the most serious results of damage to the ozone layer?
100
refrigerant liquid turns to a vapor.
What is a vapor compression refrigeration system, cooling occurs when
200
The vacuum indicator shows you have reached and held the required finished vacuum.
What is when a system is considered dehydrated
200
as far from the vacuum pump as possible.
What is to obtain an accurate vacuum readings during system evacuation, the system vacuum gauge should be located:
200
it can result in venting refrigerant to the atmosphere. the tank may explode, causing serious injury to people nearby. refrigerant in the tank may decompose, forming a toxic material.
What is never use an open flame to heat a refrigerant tank because:
200
attach DOT classification tags.
What is when transporting cylinders containing used refrigerant, the DOT requires that you:
200
is the process of removing refrigerant in any condition from a system and storing it in an external container without necessarily testing or processing it in any way.
What is recovering
300
Decrease in dehydration time
When dehydrating a system, the system can be heated to
300
free of rust and damage. color coded to indicate the contents. secure
What are refrigerant cylinders
300
liquid refrigerant between service valves.
What is after refrigerant liquid transfer between recovery unit and the system being emptied, you need to avoid trapping:
300
a refrigerant cylinder which is being returned for reclaiming.
What is the need to place a refrigerant label on:
300
the system may be leaking.
What is a system will not hold a vacuum after it has been evacuated
400
Acid will form
When moisture exists in an operating system, what is most likely to occur?
400
wear safety glasses wear protective gloves follow all safety precautions for the equipment
What is when operating refrigerant recovery or recycling equipment, the following precautions should always be followed
400
to meet safety requirements
What is containers designated "refillable" by DOT are used for transporting recovered pressurized refrigerant
400
With Type II certification, you are certified for all very high pressure refrigerants including CFC- 13 and CFC-503.
What is technicians receiving a passing grade on the Type II (medium-pressure, high-pressure and very high pressure) exam are certified to recover refrigerant during the maintenance, service, or repair of medium- and high-pressure equipment and very high pressure refrigerants, including:
400
According to the EPA, a _________ leak detection methods is considered to be the most effective for locating the general area of a small leak.
What is electronic or ultrasonic tester
500
the length of dehydration time.
What is the size (capacity) of the vacuum pump and the size of the suction line used will determine:
500
There is a relief valve in the downstream line from the pressure regulator.
What is whenever dry nitrogen from a portable cylinder is connected to a system, what item is of most importance in consideration of safety?
500
the design pressure on the equipment nameplate
What is to determine the maximum allowable pressure to use when checking a system, check:
500
in uneven amounts due to different vapor pressures.
What is non-Azeotropic refrigerants leak from a system:
500
All recovery equipment currently being made is required to have
What is an EPA approved certification label.
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