Core
An ozone molecule is made up of....
What is 3 oxygen molecules
EPA section 608 certification must be renewed every how many years
What is none
Pressure relief valves must not be (in series, parallel, vertically, horizontally)
What is in series
After recovering the liquid refrigerant what must then be recovered
What is vapor refrigerant
Halons were completely phased out by what year
What is 1994
A refillable refrigerant cylinder must never be filled more than what percent of its capacity by weight
What is 80%
A drop in replacement refrigerant substitute for R-12 in a small appliance
What is none
The evaporation temperature of R-410a at 100 psig is
What is 30 degrees
During chiller evacuation water is circulated to prevent
What is freezing of water
If using a recovery machine after this date you must evacuate the unit to 0 psig
What is November 15, 1993
Blended refrigerants leak from a system in uneven amounts due to different
What is vapor pressures
What is the maximum allowable factory charge of refrigerant for Type I appliances?
5lbs
When under a deep vacuum the motor winding of a hermetic refrigeration compressor will be damaged if
What is energized
Maximum test pressure for a leak testing a low pressure centrifugal how many psig
What is 10
when was the Montreal protocol put in place
September 16th, 1987
Refrigerant that enters the expansion of throttling device is in what state of matter
What is liquid
At high temperatures (for example open flames and glowing metal surfaces) R-12 and R-22 can decompose to form
phosgene gas
When inspecting a system for leaks one of the first things to leak for
What is traces of oil
The PRIMARY purpose of a purge unit on a CFC-11 chiller is to remove
What is noncondensables
Recovery equipment used for the service or repair of small appliances must be certified by an EPA-approved laboratory if the recovery equipment was manufactured after
November 15 1993
When using nitrogen to pressurize a system you should always charge through a...
What is pressure regulator
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
A system can be evacuated to only atmospheric pressure when leaks in the appliance...
What is make evacuation to the prescribed level unattainable
What should Mr.Varley get the class for breakfast?
What is Breakfeast Sandwhich
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