CFC-12, CFC-11, and HFC-134a are code grouped as A-1 refrigerants

The refrigerant leaves the compressor as a ______:

The most efficient method of leak checking a charged low-pressure refrigeration unit is to pressurize the system by the use of controlled hot water or heater blankets:

The primary purpose of a purge unit is to remove non-condensables from the system

Typical design burst pressure for a rupture disc on a low-pressure centrifugal chiller system is set at :

The ASHRAE Guideline 3-1996 states that if the pressure in a system rises from 1 mm Hg to a level above ____ during vacuum testing, the system should be leak checked

The ARI-certified, tested refrigerant-to-air-emission ratio should be below ______ of refrigerant per pound of air purged:

To ensure the purge unit will perform to its published efficiency rating, verify the unit is ARI-certified to:

From Temperature and pressure chart, if you know the type of refrigerant and the _____, you can calculate the evaporation temperature in the evaporator

All recovery cylinders must be DOT approved and have a current hydrostatic test date stamped on them if they contain a refrigerant with a pressure above _____ at room temperature

Regardless of the recovery method used, all Type II or Type III certified technicians must have at least one recovery machine capable of achieving the required evacuation level

EPA regulations require that all commercial and industrial process refrigeration containing more than 50 lbs. of refrigerant be repaired when the annual leak rate exceeds _____