EPA 608 TYPE 3 TEST ACTUAL EXAM 210 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+<\/p>\n\n\n\n
EPA 608 TYPE 3 TEST 2023-2024 ACTUAL EXAM 210 The pressure corresponding to 32 F for R-123 – ANSWER- 20 inches of EPA regulations require that leaking commercial or industrial process When using recovery or recycling equipment that was made after 11-15-
QUESTIONS AND CORRECT DETAILED ANSWERS
WITH RATIONALES (VERIFIED ANSWERS)
|ALREADY GRADED A+
A system does not have to be evacuated all the way to the required level
when: – ANSWER- leaks in the appliance make evacuation to the
prescribed level unattainable
Which of the foloowing repairs would ALWAYS be considered “major”
under EPA’s – ANSWER- replacement of evaporator coil
Under EPA’s regulation’s is used to pressurize a low pressure
chiller for the purpose of opening the system for a non major repair? –
ANSWER- warming the refrigerant
If you are using a recovery machine manufactored AFTER 11-15-93 you
must evacuate an low pressure appliance to<\/em> before making a
major repair. – ANSWER- 25 mm of Hg absolute
After reaching the required recovery vacuum on a chiller, you should –
ANSWER- Wait for at least a few minutes to see if the system pressure
rises, indicating that there is till refrigerant in a liquid form or in the oil<\/p>\n\n\n\n
HG vacuum
When evacuating a system the use of too large a vacuum pump can
cause? – ANSWER- trapped water to freeze
Refrigerant-11 at a pressure of 17 inches HG vacuum has a saturation
temperature of: – ANSWER- 35F
During the evacuation of a system containing large amounts of moisture
you can prevent freezing of this moisture by increasing the pressure
with______gas – ANSWER- nitrogen
ASHRAE standard 15-1994 requires that each machinery room must
activate an alarm and mechanical ventilation beofre refrigerant
concentrations exceed: – ANSWER- the threshold limit valve and time
weighted average
The typical design burst pressure for a rupture disk on a low pressure
centrifugal air-conditioning system is set at_______ – ANSWER- 15 psi
Heat pumps that have been retrofitted from R22 to R407C should be
leak checked with: – ANSWER- pressurized nitrogen
When a new system has been assembled, the first thing to do is: –
ANSWER- pressurize the system with inert gas and leak check<\/p>\n\n\n\n
refrigeration equipment must be repaired when the leak rate
exceeds______ of the charge per year. – ANSWER- 35%
Prior to replacing the condenser coil in a high pressure system, the
refrigerant was recovered and stored in a refillable container. The
refrigerant: – ANSWER- can probably be charged back into the system
R-410A requires recovery tanks rated for at least: – ANSWER- 400 psig
to recover liquid refrigerant you must connect one hose to the –
ANSWER- liquid line
The primary water source for cooling the condenser of a water-cooled
recovery unit is: – ANSWER- local municipal water supply
After refrigerant liquid has been recovered from a system, any remaining
vapor is: – ANSWER- 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: – ANSWERfrom the liquid line entering the evaporator
the recovery of refrigerant from a system as a vapor only will minimize
the loss of: – ANSWER- oil<\/p>\n\n\n\n
93 you must evacute a system containing MORE than 200 pounds of
CFC-12 to before making a major repair. – ANSWER- 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 _<\/em><\/strong> before disposing of the system. –
ANSWER- 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: – ANSWER- 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 – ANSWER- \u2026
A system can be evacuated to only atmospheric pressure when: –
ANSWER- 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: – ANSWER- Evacuate the isolated section
of the system to atmospheric pressure and hold. If system pressure does
not rise, remove the compressor.
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