Core
Type I
Type II
Type III
Dates
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
Halons were completely phased out by what year
What is 1994
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
If using a recovery machine after this date you must evacuate the unit to 0 psig
What is November 15, 1993
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
The Clean Air Act of what year began funding for the study and cleanup of air pollution
What is 1963
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
On what date did the Fourth Meeting of the Montreal Protocol was convened. In this meeting, the parties took a number of actions, including accelerating the phase-out schedule of CFCs, halons, carbon tetrachloride, and methyl chloroform, and added HCFCs and methyl bromide to the list of chemicals to be controlled under the Montreal Protocol.
What is November 25, 1992
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
When using recovery and recycling equipment before this date technicians must evacuate a unit that has 10lb charge of CFC-500 to 4 inches of Hg vacuum
What is November 15, 1993
M
e
n
u