EPA Type 2 Questions and Answers
Already Graded A
Heat pumps that have been retrofitted from R22 to R407C should be leak checked with:
✔✔pressurized nitrogen
When a new system has been assembled, the first thing to d
...
EPA Type 2 Questions and Answers
Already Graded A
Heat pumps that have been retrofitted from R22 to R407C should be leak checked with:
✔✔pressurized nitrogen
When a new system has been assembled, the first thing to do is: ✔✔pressurize the system with
inert gas and leak check
EPA regulations require that leaking commercial or industrial process refrigeration equipment
must be repaired when the leak rate exceeds______ of the charge per year. ✔✔35%
Prior to replacing the condenser coil in a high pressure system, the refrigerant was recovered and
stored in a refillable container. The refrigerant: ✔✔can probably be charged back into the system
R-410A requires recovery tanks rated for at least: ✔✔400 psig
to recover liquid refrigerant you must connect one hose to the ✔✔liquid line
The primary water source for cooling the condenser of a water-cooled recovery unit is: ✔✔local
municipal water supply
After refrigerant liquid has been recovered from a system, any remaining vapor is:
✔✔condensed by the recovery system
With an air-cooled condenser on the roof of a building and the evaporator on the first floor,
recovery should first occur: ✔✔from the liquid line entering the evaporator
the recovery of refrigerant from a system as a vapor only will minimize the loss of: ✔✔oil
When using recovery or recycling equipment that was made after 11-15-93 you must evacute a
system containing MORE than 200 pounds of CFC-12 to ________ before making a major
repair. ✔✔15 inches of HG vacuum
When using recovery or recycling equipment that was made BEFORE 11-15-93 technicians must
evacuate a unit that has a normal charge of 10 pounds of CFC-500 to _____ before disposing of
the system. ✔✔4 inches of HG vacuum
To change the compressor on a system cantaining 40 pounds R-500 using a recycling machine
that was manufactured AFTER 11-15-93 you must isolate the compressor then: ✔✔evacuate the
isolated section of the system to 10 inches of vacuum and hold. If the system pressure does not
rise, remove the compressor.
Recycling and recovery equipment maufactured after 11-15-93 does not need an oil separator
✔✔...
A system can be evacuated to only atmospheric pressure when: ✔✔leaks in the appliance make
the evacuation to the prescribed level unattainable
To change the compressor on a system containing R-410A, you must isolate the compressor
then: ✔✔Evacuate the isolated section of the system to atmospheric pressure and hold. If system
pressure does not rise, remove the compressor.
System- dependent recovery equipment CANNOT be used when: ✔✔the appliance contains
over 15 pounds of refrigerant
Moisture is removed a system by: ✔✔using a filter drier
When a unit is opened for servicing the ______ should always be replaced ✔✔filter drier
The backseating of a suction shutoff valvee will close the: ✔✔guage port
When charging an R-12 refrigeration system that uses a water cooled condensor, you must first
charge with vapor to a pressure of at least _____ , before switching to a liquid charging. ✔✔35
psig
A compressor heater is used to: ✔✔reduce the amount of refrigerant in the lubricating oil
While R-410A is a high pressure refrigerant, it can be stored in the back of your service van as
long as: ✔✔the temperature inside the vehicle does not exceed 125 degrees F. This is the same
guidance given for R-22 and other common refrigerants.
For what refrigerant is an equipment room refrigerant monitor required under ASHRAE standard
15? ✔✔R-123
A reciprocating compressor should not be energized if the ✔✔discharge service valve has closed
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