EPA EXAM VERSION D34
Which of the following statements about recycling and recovery
equipment is FALSE? - ANSWERS-Purchases of such equipment
must be reported to the EPA
You are changing out the compressor of a system containing 40
pounds of R-404A. In addition to isolating the compressor, which of
the following procedures should you follow? - ANSWERS-Evacuate
the isolated section of the system to 0 psig and if system pressure does
not rise after a few minutes, remove the compressor.
What should be done after reaching the required recovery vacuum on
an appliance? - ANSWERS-Wait for at least a few minutes to see if
the system pressure rises
Before making a major repair, technicians must evacuate an appliance
or component containing more than 200 pounds of R-410A to which
of the following levels? - ANSWERS-10 inches of Hg vacuum
When can appliances containing refrigerants be recovered to
atmospheric pressure? - ANSWERS-Leaks in the appliance make
recovery to the prescribed level unattainable
Which of the following repairs would always be considered "major"
under EPA's regulations? - ANSWERS-Replacement of an evaporator
coil
, When is it against EPA regulations to use system-dependent recovery
equipment? - ANSWERS-When the appliance contains over 15
pounds of refrigerant
What is the component directly following the condenser in a
refrigeration system using a thermal expansion valve - ANSWERS-
receiver
What would be the approximate refrigerant pressure of an R-410A
machine at (80°F) room temperature while the machine is idle -
ANSWERS-236 psig
During evacuation with large amounts of moisture it may be
necessary to increase pressure to counteract freezing with gas such as;
- ANSWERS-Nitrogen
For what refrigerant is an equipment room refrigerant detector NOT
required under ASHRAE Standard 15 provided the mechanical
ventilation system in the machinery is run continuously? -
ANSWERS-R-717
When could a reciprocating compressor be damaged if energized? -
ANSWERS-When the discharge service valve is closed
What will non-condensables in a refrigeration system result in? -
ANSWERS-Higher discharge pressure
Which of the following statements about recycling and recovery
equipment is FALSE? - ANSWERS-Purchases of such equipment
must be reported to the EPA
You are changing out the compressor of a system containing 40
pounds of R-404A. In addition to isolating the compressor, which of
the following procedures should you follow? - ANSWERS-Evacuate
the isolated section of the system to 0 psig and if system pressure does
not rise after a few minutes, remove the compressor.
What should be done after reaching the required recovery vacuum on
an appliance? - ANSWERS-Wait for at least a few minutes to see if
the system pressure rises
Before making a major repair, technicians must evacuate an appliance
or component containing more than 200 pounds of R-410A to which
of the following levels? - ANSWERS-10 inches of Hg vacuum
When can appliances containing refrigerants be recovered to
atmospheric pressure? - ANSWERS-Leaks in the appliance make
recovery to the prescribed level unattainable
Which of the following repairs would always be considered "major"
under EPA's regulations? - ANSWERS-Replacement of an evaporator
coil
, When is it against EPA regulations to use system-dependent recovery
equipment? - ANSWERS-When the appliance contains over 15
pounds of refrigerant
What is the component directly following the condenser in a
refrigeration system using a thermal expansion valve - ANSWERS-
receiver
What would be the approximate refrigerant pressure of an R-410A
machine at (80°F) room temperature while the machine is idle -
ANSWERS-236 psig
During evacuation with large amounts of moisture it may be
necessary to increase pressure to counteract freezing with gas such as;
- ANSWERS-Nitrogen
For what refrigerant is an equipment room refrigerant detector NOT
required under ASHRAE Standard 15 provided the mechanical
ventilation system in the machinery is run continuously? -
ANSWERS-R-717
When could a reciprocating compressor be damaged if energized? -
ANSWERS-When the discharge service valve is closed
What will non-condensables in a refrigeration system result in? -
ANSWERS-Higher discharge pressure
