and Answers
After the installation of any type of system, or a major repair to a system, the unit
must be leak checked. The recommended procedure is to - Correct Answer
.pressurize the system with an inert gas (nitrogen) and leak check
Traces of oil around the sight glass inlet fitting of a refrigeration system might be an
indication of - Correct Answer A leak
A condition of excessive superheat at the evaporator outlet and the compressor inlet
of a A/C system could be an indication of - Correct Answer .
Low on refrigerant charge
Type II classification, as identified by the EPA, applies to what equipment? - Correct
Answer Split air conditioning systems with five (5) lbs. or more refrigerant charge
Front seating the three way suction service valve will close the _ - Correct Answer
Suction inlet to the valve
The required evacuation level for high pressure appliances using recovery
equipment manufactured before November 15, 1993 with a charge of less than 200
lbs. is - Correct Answer 0 inches Hg
The required evacuation level for recovery equipment manufactured after November
15, 1993 with an R-407C charge of less than 200 lbs. is - Correct Answer 0 inches
Hg
The required evacuation level for recovery equipment manufactured after November
15, 1993 with an R-12 charge of less than 200 lbs. is - Correct Answer 10 inches
Hg
industrial process refrigeration equipment (IPR) with an annual leak rate of ______
% requires repair under EPA regulations. - Correct Answer 30%
Comfort cooling chillers and all other equipment with an annual leak rate of ______
% requires repair under EPA regulations. - Correct Answer 10%
Recover time can be shortened by - Correct Answer a.All of the above
b.Recovering as much liquid as possibe in the initial stagec.
c.Cooling the recovery tank in ice waterd.
d.Using short hoses