EPA 608 Type 3 questions with solutions

EPA 608 Type 3 questions with Which of the foloowing repairs would n’l n’l n’l n’l n’l




ALWAYS be considered "major" under
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EPA's - answersreplacement of
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evaporator coil
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On low pressure chillers, moisture typically enters the refrigerant system
n’l n’l Under EPA's regulation's _______ is n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




through - answersair leaks from areas with gaskets or fittings
n’l used to pressurize a low pressure
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chiller for the purpose of opening the n’l n’l n’l n’l n’l n’l n’l




The maximum test pressure for leak testing a low pressure centrifugal is: - system for a non major repair? -
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answers10 psig
n’l answerswarming the refrigerant n’l n’l n’l n’l




Leak test and repair the chiller to reduce refrigerant loss from a pruge unit
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l If you are using a recovery machine
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on CFC-11 chiller - answers...
n’l n’l n’l n’l n’l manufactored AFTER 11-15-93 you
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must evacuate an low pressure
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A hydrostatic tube test kit is used to: - answersdetermine if a tube leaks
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l appliance to _______ before making a
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major repair. - answers25 mm of Hg
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Commercial and industrial process refrigeration systems must be n’l n’l n’l n’l n’l n’l n’l absolute
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repaired when the leak rate exceeds ____ of the charge per year. -
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answers35%
n’l After reaching the required recovery n’l n’l n’l n’l




vacuum on a chiller, you should - n’l n’l n’l n’l n’l n’l n’l




Refrigerant recovery typically start with liquid recovery it is faster. - answersWait for at least a few minutes n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




answers...
n’l to see if the system pressure rises, n’l n’l n’l n’l n’l n’l n’l




indicating that there is till refrigerant in a n’l n’l n’l n’l n’l n’l n’l n’l




A rupture disc on a recovery vessel for a low pressure refrigerants relieves liquid form or in the oil
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at: - answers15 psig
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The pressure corresponding to 32 F for n’l n’l n’l n’l n’l n’l




According to ASHRAE Guideline 3-1996, if the pressure in a system rises R-123 - answers20 inches of HG n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




from 1 mm Hg to a level above ____ during a standing vacuum test, the
n’l n’l n’l vacuum n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




system should be checked for leaks. - answers2.5 mm Hg
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When evacuating a system the use of n’l n’l n’l n’l n’l n’l




The primary water source for a recovery unit condensing coil is _____. -
n’l too large a vacuum pump can cause? - n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




answerslocal municipal water supply
n’l answerstrapped water to freeze n’l n’l n’l n’l n’l n’l n’l




When recharging a refrigeration system with R-11, what vaporpressure is Refrigerant-11 at a pressure of 17
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necessary in the shells before changing with liquid? - answers16.9" Hg
n’l inches HG vacuum has a saturation n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




vacuum
n’l temperature of: - answers35F n’l n’l n’l n’l




After recovering the liquid refrigerant you must: - answersrecover the
n’l n’l n’l n’l n’l n’l n’l n’l n’l During the evacuation of a system n’l n’l n’l n’l n’l




vapor refrigerant
n’l n’l containing large amounts of moisture
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you can prevent freezing of this
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According to the EPA there is approximately _____ refrigerant vapor left n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l moisture by increasing the pressure
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in an average 350 ton R-11 chiller at 0 psig pressure once all the R-11
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l with______gas - answersnitrogen
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liquid has been removed. - answers100 pounds
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ASHRAE standard 15-1994 requires n’l n’l n’l




Charging refrigerant liquid into a refrigeration system when it is under a 29 that each machinery room must n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




inch Hg vacuum can cause the: - answerssystem water to freeze
n’l n’l activate an alarm and mechanical
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ventilation beofre refrigerant n’l n’l n’l




A system does not have to be evacuated all the way to the required level
n’l concentrations exceed: - answersthe
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when: - answersleaks in the appliance make evacuation to the prescribed threshold limit valve and time weighted
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level unattainable
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, The typical design burst pressure for a rupture disk on a low pressure
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l Recycling and recovery equipment n’l n’l n’l




centrifugal air-conditioning system is set at_______ - answers15 psi
n’l n’l n’l n’l n’l n’l n’l n’l n’l maufactured after 11-15-93 does not
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need an oil separator - answers...
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Heat pumps that have been retrofitted from R22 to R407C should be leak
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checked with: - answerspressurized nitrogen
n’l n’l n’l n’l n’l A system can be evacuated to only
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atmospheric pressure when: -
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When a new system has been assembled, the first thing to do is: - n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l answersleaks in the appliance make
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answerspressurize the system with inert gas and leak check
n’l n’l n’l n’l n’l n’l n’l n’l n’l the evacuation to the prescribed level
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unattainable
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EPA regulations require that leaking commercial or industrial process
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refrigeration equipment must be repaired when the leak rate
n’l n’l n’l n’l n’l n’l n’l n’l n’l To change the compressor on a system
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exceeds______ of the charge per year. - answers35%
n’l n’l n’l n’l n’l n’l n’l n’l containing R-410A, you must isolate
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the compressor then: -
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Prior to replacing the condenser coil in a high pressure system, the
n’l n’ l n’l n’l n’l n’l n’l n’l n’l n’l n’l answersEvacuate the isolated section
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refrigerant was recovered and stored in a refillable container. The
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l of the system to atmospheric pressure
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refrigerant: - answerscan probably be charged back into the system
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l and hold. If system pressure does not
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rise, remove the compressor.
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R-410A requires recovery tanks rated for at least: - answers400 psig n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




System- dependent recovery n’l n’l




to recover liquid refrigerant you must connect one hose to the -
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l equipment CANNOT be used when: -
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answersliquid line
n’l n’l answersthe appliance contains over
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15 pounds of refrigerant
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The primary water source for cooling the condenser of a water-cooled
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recovery unit is: - answerslocal municipal water supply
n’l n’l n’l n’l n’l n’l n’l n’l Moisture is removed a system by: - n’l n’l n’l n’l n’l n’l




answersusing a filter drier
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After refrigerant liquid has been recovered from a system, any remaining
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vapor is: - answerscondensed by the recovery system
n’l n’l n’l n’l n’l n’l n’l n’l When a unit is opened for servicing the n’l n’l n’l n’l n’l n’l n’l




______ should always be replaced -
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With an air-cooled condenser on the roof of a building and the evaporator
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l answersfilter drier
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on the first floor, recovery should first occur: - answersfrom the liquid line
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entering the evaporator
n’l n’l n’l The backseating of a suction shutoff
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valvee will close the: - answersguage
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the recovery of refrigerant from a system as a vapor only will minimize the
n’l n’l n’l n’l n’l n’l n ’l n’l n’l n’l n’l n’l n’l port
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loss of: - answersoil
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When charging an R-12 refrigeration n’l n’l n’l n’l




When using recovery or recycling equipment that was made after 11-15-n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l system that uses a water cooled
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93 you must evacute a system containing MORE than 200 pounds of
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l condensor, you must first charge with
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CFC-12 to ________ before making a major repair. - answers15 inches of
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l vapor to a pressure of at least _____ ,
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HG vacuum
n’l n’l before switching to a liquid charging. -
n’l n’l n’l n’l n’l n’l n’l




answers35 psig
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When using recovery or recycling equipment that was made BEFORE 11- n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




15-93 technicians must evacuate a unit that has a normal charge of 10
n’l A compressor heater is used to: - n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




pounds of CFC-500 to _____ before disposing of the system. - answers4 answersreduce the amount of
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l




inches of HG vacuum
n’l refrigerant in the lubricating oil
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To change the compressor on a system cantaining 40 pounds R-500
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l While R-410A is a high pressure n’l n’l n’l n’l n’l




using a recycling machine that was manufactured AFTER 11-15-93 you
n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l refrigerant, it can be stored in the back
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must isolate the compressor then: - answersevacuate the isolated
n’l n’l n’l n’l n’l n’l n’l n’l n’l of your service van as long as: -
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section of the system to 10 inches of vacuum and hold. If the system
n’l n’ l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l n’l answersthe temperature inside the
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pressure does not rise, remove the compressor.
n’l n’l n’l n’l n’l n’l n’l vehicle does not exceed 125 degrees
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2/ 6 ’l
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