and Correct Detailed Answers Already Graded A+
During the evacuation of a system that contains large amounts of moisture it may
be necessary to increase pressure in the system with ________, to counteract the
freezing of the moisture. CORRECT ANSWER-Nitrogen.
When under a deep vacuum, the motor winding of a hermetic refrigeration
compressor? CORRECT ANSWER-Will be damaged if energized.
When using recovery or recycling equipment that was manufactured AFTER
November 15, 1993: you must evacuate a system containing MORE than 200
pounds of CFC-12 to _______ before making a major repair. CORRECT
ANSWER-15 inches Hg vacuum
When inspecting a system for leaks, you should look for? CORRECT ANSWER-
Traces of oil.
Refrigerant leaves the receiver of a system as a? CORRECT ANSWER-High
pressure liquid.
, A compressor heater is used to? CORRECT ANSWER-Reduce the amount of
refrigerant in the lubricating oil.
When a new system has been assembled, the first thing to do is? CORRECT
ANSWER-Pressurize the system with an inert gas & leak check.
After installation of a field-piped R-410A split heat pulp, the unit should first be?
CORRECT ANSWER-Pressurized with nitrogen then leak checked.
The EPA regulations require that any appliances containing more than 50 pounds
of refrigerant (except for commercial & industrial process refrigeration) must be
repaired when the leak rate exceeds _________ of the charge per year?
CORRECT ANSWER-15%
R-410A requires recovery tanks rated for at least? CORRECT ANSWER-400 psig
After refrigerant liquid has been recovered from a system, any remaining vapor
is? CORRECT ANSWER-Condensed by the recovery system.
Your recovery/recycling machine has R-502 refrigerant in it. You now have to
recover refrigerant from a unit with R-22. What must be done before the R-22