Core
Type 1
Type 2
Type 3
Misc
100
An ozone molecule is made up of blank
What is 3 oxygen atoms
100
EPA section 608 certification must be renewed every how many years
What is none
100
Pressure relief valves must not be (in series, parallel, vertically, horizontally)
What is in series
100

After recovering the liquid refrigerant what must then be recovered

What is vapor refrigerant

100

What color is a recovery tank

Grey Body with Yellow Top

200
A refillable refrigerant cylinder must never be filled more than what percent of its capacity by weight
What is 80%
200
A drop in replacement refrigerant substitute for R-12 in a small appliance
What is none
200
The evaporation temperature of R-410a at 100 psig is
What is 30 degrees
200
During chiller evacuation water is circulated to prevent
What is freezing of water
200

What is the term for the legal amount of refrigerant that can be vented

De minimis 

300
Blended refrigerants leak from a system in uneven amounts due to different
What is vapor pressures
300
A recovery cylinder half full of recovered R-500 at normal room temp 75 degrees will be pressurized to how many psig
What is 96.8 psig
300
When under a deep vacuum the motor winding of a hermetic refrigeration compressor will be damaged if
What is energized
300
Maximum test pressure for a leak testing a low pressure centrifugal how many psig
What is 10
300

If a unit holds 144 ounces of refrigerant, what is the conversion to pounds?

What is 9 pounds

400
Refrigerant that enters the expansion of throttling device is in what state of matter
What is liquid
400
A recovery cylinder which is half full of recovered R-410A at 90 degrees F in the absence of non-condensables will be pressurized to how many psig
What is 277 psig
400
When inspecting a system for leaks one of the first things to leak for
What is traces of oil
400
The PRIMARY purpose of a purge unit on a CFC-11 chiller is to remove
What is noncondensables
400

What refrigerant number is propane?

R-290

500
When using nitrogen to pressurize a system you should always charge through a
What is pressure regulator
500
When using a passive system dependent recovery process you should access both the high and low side of the system for the refrigerant recovery if
What is the compressor does not run
500
A system can be evacuated to only atmospheric pressure when leaks in the appliance...
What is make evacuation to the prescribed level unattainable
500
When charging a R-410a water chiller you must first charge with vapor to a pressure of atleast how many psig before switching to liquid charging
What is 120 psig
500

What does GWP stand for

Global Warming Potential

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