The primary water source for a recovery unit condensing coil is

Which statement is NOT true of recycling and recovery equipment manufactured after November 15 1993?

A system does not have to be evacuated all the way to the required level when

Which action listed below is the proper method to reduce refrigerant loss from a purge unit on a CFC-11 chiller?

Identify the pressure corresponding to 32F for R-123:

What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube leaks?

Pressure relief valves must never be

If you are going to be removing oil from a low-pressure system, you should heat the oil because

After recovering the liquid refrigerant you must

EPA regulations require that any appliances containing more than 50 pounds of refrigerant, except for commercial and industrial process refrigeration, must be repaired when the leak-rate exceeds ______ of the charge per year.

If you are using a recovery machine manufactured BEFORE November 15 1993, you must evacuate any low-pressure appliance to ______ before making a major repair.

On low-pressure chillers, moisture typically enters the refrigerant system through

Refrigerant-11 at a pressure of 17 inches Hg vacuum has a saturation temperature of

The lowest access point on a low-pressure centrifugal air-conditioning unit is the

A rupture disc on a recovery vessel for low-pressure refrigerants relieves at

According to ASHRAE Guideline 3-1996, if the pressure in a system rises from 1 mm Hg to a level above ______ during a standing vacuum test, the system should be checked for leaks.

During chiller evacuation, water is circulated to

When charging an R-410a water chiller, you must first charge with vapor to a pressure of at least ______ before switching to liquid charging.

If you leak test a low-pressure chiller with nitrogen in excess of 10 psig you could cause the ______ to fail.

ASHRAE Standard 15-1994 requires that each machinery room must activate an alarm and mechanical ventilation before refrigerant concentrations exceed

Which repair WOULD NOT fall under the EPA definition for major maintenance, service, or repair?

Refrigerant is added to a centrifugal machine through the

What is meant by the term “high efficiency purge unit”?

The primary purpose of a purge unit on a CFC-11 chiller is to

If you are using a recovery machine manufactured AFTER November 15 1993, you must evacuate any low pressure appliance to ______ before making a major repair.