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● 안녕하세요 ? 국내외 회원님들. 2020년도 들어 많은것이 변화하여 때늦은 교재 업그레이드//개정판 20편, 미환경청 요구 사항으로 미환경청 공기청정법 냉매회수 냉매취급자격증 시험 문제 전면 교체및 교재가 바뀌였읍니다.
● 앞서 공부하시라 요약부분 별도 올려드리고, 감독기관의 초벌격인 개정판 올려드리던중 , 사용하던 테블렛 사용에 문제발생으로 체계적인 번역이 올려지지 않아, 외부적인 문제에 관여하지 않고 다시한번 , 순서적으로 최근 시험보실 회원, 비회원. (* 비영어권및 원어민 포함. ) 여러분들 편의를 감안하여 2편을 재번역하여 올려보려 합니다.
● 최근 6개월간 시험을 치루는데 같은 경향의 문제가 제출되기에 (* 시험문제 시리즈 70' s. )같은 내용으로 올려 보려합니다.
● 특히 최근 재시험보시는 미주 비회원님들 앞서 받으신 자격증 사본/copy가 필요하기에 잘보관하셨다가 제출하여 주셔야 합니다.
(* 다른기관에서 시험보신후 재시험 보시는 비회원에 한하여 기존하는 자격증 사본을 제출하여 주시면 인증하여 재시험 결과에 따라 진행하도록 필요 한 타입만 시험볼수 있도록 감독기관에서 요구하는 사항이기도 합니다. )
● 시험통과 점수는 여전히 70%통과를 기준으로 여전히 100문제중 1번에서 25번문제 (* core/기초. )통과를 하셔야 나머지 타입 I. (* Small appliances : 5파운드미만. )., 타입II. (* High Pressure Appliance )., 타입III. (* Low Pressure Appliance //Commercial Refrigeration. )., 70% 통과를 인정하여 줍니다.
(* 각 카테고리 /타입. 25문제중 18개이상 맞으셔야 통과하십니다. )
● 플랫폼 정리 관계로 원문 문제 먼저 올려드리고, 재편집 차원에서 한글번역분 나중에 올려드리는 순서로 진행하려 보려합니다.
● 시대변화에 맞추어 스마트폰 사용, 테블렛 사용, 렙탑사용을 감안하여 부족한 사항아래 옮겨진 교재번역과 업그래이드 연습문제 제공으로 자습형태를 빌려 공부하시는데 도움이 되었으면 좋겠습니다.
● 모든 세미나 시행시에 각자 디지털 개인장비. (* 스마트폰, 테블렛, 렙탑 ) 지참 사용 하시는것을 기초로 하며 파워포인트를 (* PPT . )중심으로 진행될 예정이기에 적극적인 번역기 사용 참여 (* Google Translator. )를 부탁드려 봅니다.
● 진행하는 보조기사는 여러분들의 많은 관심과 참여 그리고 질문을 환영하기에 댓글 형식으로 올려주시면 성의껏 답변드리겠습니다.
■■■ Core Section:
1) What does ozone in the stratosphere above the earth consist of ?
(* 대기상층권의 오존은 어떻게 구성되여 있을까요. ? )
a. Molecules containing 2 oxygen atoms.
b. Molecules containing 3 oxygen atoms.
c. Molecules containing 4 oxygen atoms.
d. Molecule containing 5 oxygen atoms.
(* b ) p.51.//p.49.
2) Which elements of a CFC or HCFC molecule causes ozone depletion ?
(* CFC'S 혹은 HCFC에 속하여 있는 어떤분자가 오존 파괴의 원인이 되나요 ? )
a. Fluorine
b. Chlorine.
c. Carbon.
d. Hydrogen.
(* b )p.51 ~ 53.// p.49.
3) What characteristics of CFCS and HCFC'S make them more likely to reach the stratosphere then most other compounds containing Chlorine?
(* CFC'S 나 HCFC 계통에 함유된 염소분자 (* Chlorine. )이 다른 분자보다 대기 상층권에서 더많이 도달 성형하는 이유는 ? )
a. They do not dissolve in water or easily break down in the atmosphere.
b. They are lighter than other Chlorine compounds, making it easier for them to reach the stratosphere when released.
c. They are stored under pressure, causing them to jet upward when released.
d. They are attracted to ultraviolet radiation.
(* a ) p.49 ~ 51.
4) Which of the following refrigerants has the lowest global warming potential ?
(* 지구온난화 현상에 제일 작은 역할을 하는 냉매종류는. ? )
a. R-134a.
b. R-407C.
c. R-410A.
d. R-600a.
(* d) p.28.
5) Which of the following gases is used as the baseline Measurement for global warming potential ?
(* 지구온난화 현상의 기본적인 원인은어느 개스를 중심으로 하나요. ? )
a. Ammonia.
b. Carbon Dioxide.
c. CFC-12.
d. Propane.
(* b )p.56 // T-4-2.
6) Which type of refrigerant typically has the lowest global warming potential ?
(* 제일 낮은 지구온난화 현상에 영향을 주는 냉매는. ? )
a. HCFCs.
b. HFOs.
c. HFCs.
d. All are equal.
(* b ) p.56.
7) What is the state of the refrigerant entering the compressor of a refrigeration system ?
(* 냉동에서 압축기/compressor 로 흡입되여 들어갈때의 냉매상태는 ? )
a. Low pressure liquid.
b. Lower pressure vapor.
c. High pressure liquid.
d. High pressure vapor.
(* b. ) p.4~6.
8) Why are HFO Refrigerants less flammable than hydrocarbon refrigerant ?
(* HFO 냉매가 탄화수소 냉매에 비하여 가연성이 낮은 이유는. ? )
a. They contain Chlorine.
b. They contain bromine.
c. They contain fluorine.
d. They contain carbon.
(* c )p.27.
9) Which of the following refrigerants is an HFO ?
(* HFO 냉매에 속하는 냉매 ? )
a. R-1234yf.
b. R-123.
c. R-134a.
d. All three are HFOs.
(* a )p.27~ 28.
10) Which type of refrigerant has the highest ozone depletion potential (* ODP ) ?
(* 다음 냉매중 오존파괴 가능성이 제일 높다라고 알려진것은 ? )
a. HCFCs.
b. HFCs.
c. CFCs.
d. HFOs.
(* c ) p.51.
11) Which type of refrigerant is the most harmful to Stratospheric Ozone ?
(* 어느 종류의 냉매가 대기상층권에서 해로울까요 ? )
a. CFCs.
b. HCFCs.
c. HFCs.
d. HFOs.
(* a) p.51.
12) What is being done in the U.S. to stop damage to the Stratospheric Ozone Layer ?
(* 미주에서는 대기상층권의 오존을 보호하기 위하여 어떤조치를 취할까요 ? )
a. Using natural gas instead of coal to generate electricity.
b. Phasing out the use of Chlorofluorocarbon and Hydrofluorocarbons.
c. Enforcing strict Emission requirements on incinerators.
d. Increasing the energy efficiency of air conditioners.
(* b )p.24 : p.62~63.
13) Which of the following is NOT a violation of the Clean Air Act or EPA'S regulations ?
(* 다음과 같은 답변중 공기청정법이나 미환경청 조례 위반이 아닌것은 ? )
a. Failing to keep required records.
b. Failing to meet required records.
c. Knowingly releasing CFC, HCFC, or HFC refrigerants while repairing appliances.
d. Knowingly recovering an exempt refrigerant.
(* d ) p.68: p.82.
14) Under EPA'S regulations, what standard must reclaimed refrigerant meet before it can be resold ?
(* EPA조례에 의하면 재환수하여 재사용/판매하려면, 그 표준은 ? )
a. AHRI 700.
b, EPA. 700.
c. ASHRAE 700.
d. UL 700.
(* a )p. 82~ p.95.
15) For an appliance that uses a CFC, HCFC, or HFC refrigerant, which of the following violates the prohibition on venting. ?
(* CFC, HCFC, HFC 사용 공조기의 냉매 대기 배출 위반사항은 ? )
a. Accidental releases associated with timely repair of an appliance.
b. Refrigerants emitted when cutting a line without properly Evacuating the appliance.
c. Refrigerants emitted in a catastrophic failure of an appliance.
d. Refrigerants emitted when connecting or disconnecting low loss hoses to charge or service an appliance.
(* b )p.94.
16) Chlorofluorocarbon (* CFC'S. ), Hydrochlorofluorocarbons (* HCFC'S. )and Hydrofluorocarbons. (* HFC'S. ) have which of the following in common ?
(* CFC'S, HCFC, 그리고 HFC 냉매의 공통점은 ? )
a) They deplete the Stratospheric Ozone Layer.
b) They contain Chlorine.
c) They must be recovered before opening or disposing of appliances.
d) They have the same saturation pressure at 70°F.
(* c )p.82.
17) What synthetic lubricant is presently used with ternary Blends containing HCFC'S. ?
(* 세가지 냉매가 섞인 HCFC에 사용하는 오일의 종류는 ? )
a. Alkylbenzene.
b. Glycol.
c. Ester.
d. Castor oil.
(* a )p.45/28.
18) What units does a compound pressure gauge for the low side of the system measure pressure in. ?
(* 저압게이지에서 보여주는 두가지 압력은 ? )
a. Psia.
b. Torrs and microns.
c. Psig and inches of mercury.
d. Psia and microns.
(* c )p.3
19) Which process applies to cleaning refrigerant for immediate reuse by oil separation and single or multiple passes through devices, like replaceable core filter driers, which reduce moisture and acidity. ?
(* 회수냉매를 새로히 사용할수 있도록오일을 정제하거나, 여러개의 필타 사용으로 습기나 산성성분을 줄이려고 하는 작업은 ? )
a. Recycling.
b. Recovering.
c. Reclaiming.
d. Restoring.
(* a )p.82.
20) Which of the following leak detection methods is considered to be the most effective for locating the general area of a small leaks ?
(* 냉매의 작은 누설검증시 무엇이 제일 보편적인 방법일까요 ? )
a. Standing vaccum test.
b. Electronic or ultrasonic tester.
c. Halide torch.
d. Audible sound.
(* c ) p.115.
21) What should a technician do if they discover that some R -410A was added to an R-22 system ?
(* 만약에 실수로 R-410A 회수탱크에 R-22를 섞엇다 가정하면, 어떠한 과정을 거쳐야 할까요 ? )
a. Vent the refrigerant since it cannot be reclaimed.
b. Recycle the refrigerant.
c. Recover the mixture in a separate recovery tank.
d. Recover and use in another system.
(* c )p.89 // p.107.
22) Which factor does NOT affect the speed of evacuation ?
(* 진공작업 스피드와는 사실이 아닌것은. ? )
a. The size of the equipment being evacuated.
b. The ambient temperature.
c. The amount of moisture in the system.
d. The brand of micron gauge used.
(* d )p.76.
23) Which of the following is NOT a recommended Safety practice when operating refrigerant recovery or recycling equipment ?
(* 냉매회수 재활용시의 안전수칙이 아닌것은 ? )
a. Wear Safety glasses.
b. Wear protective gloves.
c. Follow all Safety precautions for the equipment.
d. Remain at least 5 feet away from any operating equipment.
(* d ) p.130.
24) Refrigerant Cylinders should be all of the following, EXCEPT ?
(* 냉매탱크의 원래 목적이 아닌것은 ? )
a. Be free of rust and danage.
b. Be filled to 95% of capacity.
c. Be labeled.
d. Be secure.
(* b )p.105.
25) When transporting cylinders containing used refrigerant, DOT requires that you :
(* 회수냉매/사용하던 냉매 운반시에 미교통부 요구 사항은 ? )
a. Use OSHA-APPROVED containers.
b. Attach DOT classification tags.
c. Ship by EPA certified carrier.
d. Do all of the above.
(* b ) p.99
■■■ Type I. (* Small Appliance. )
문제 26번에서 50번까지는 타입 I (* 작은 공조기, 냉매 충전 5파운드까지. )을 다룰수 있는 자격증을 이야기 합니다.
26) Which of the following are included in EPA's definition of a " small appliances ? "
(* EPA의 규정으로 " Small Appliance "의 정의는 ? )
a. Products manufactured, fully charged and hermetically sealed in a factory.
b. Products having 15 pounds or less of refrigerants.
c. Products with compressor under 1/2 horsepower.
d. Fully charged components ready for installation in a split system.
(* a ) p.72.
27) Which of the following is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration// freezers. ?
(* 어느 종류의 냉매가 새로운 가정용 냉장고, 혹은 냉장/냉동 혼용으로 사용할수 있다 인정 받았을까요. ? )
a. R-600a.
b. R-1234yf.
c. R-1234zd.
d. R- 170.
(* a ) p.28.
28) Which hydrocarbon refrigerant is approved for retrofit into existing household refrigerators ?
(* 이미 사용하던 가정용 냉장고를 재활용 사용하려 할때, HC 냉매 교체사용이 가능한가요 ? )
a. HC R-600a. 2 ounces or less.
b. Blended HC R-441A.
c. HC R-290. 1 lb. or less.
d. Hydrocarbons are not approved for retrofit application.
(* d )p.25.
29) Recovery devices for use with small appliances containing CFC's, HCFC's, and HFC's must meet which of the following requirements. ?
(* CFC, HCFC, 그리고 HFC가 포함된 작은 공조기 냉매회수 버정 용량과 요구사항은. ? )
a. Recovering 90% of the refrigerant when the compressor is operating or acheiving a 4-inch vaccum under the conditions of AHRI-740.
b. Recovering 80% of the refrigerant when the compressor is operating.
c. Recovering 95% of the refrigerant when the compressor is operating and achieving a 10 inches vaccum under the conditions of AHRI-740.
d. Recovering 75% of the refrigerant when the compressor is operating.
(* a )p.77 //6.1.
30) Who must certify recovery equipment used during maintenance, service, or repair of small appliances that use CFC's, HCFC's, and HFC's ?
(* CFC, HCFC, HFC 사용 작은 공조기관리, 수리교체시에 사용할 냉매회수기 제조 허가는 누가 할까요. ? )
a. An ASHRAE-APPROVED laboratory.
b. Recovery equipment for small appliances does not require apprval.
c. An AHRI- 740 standard laboratory.
d. An EPA-approved laboratory.
(* d. ) p.81 ~ 95 .
31) Equipment which is used to recover CFC, HCFC, and HFC refrigerant from small appliances for the purpose of disposal must meet what standard ?
(* CFC, HCFC, HFC사용 작은 공조기를 폐기처분 하려 할때의 회수 기준은 ? )
a. Recover 95% or the refrigerant whether or not the compressor is operative.
b. Recovering 80% of the refrigerant with an inoperative compressor and 90% of the refrigerant with an operative compressor.
c. Recover 90% of the refrigerant with an inoperative compressor and 80% of the refrigerant with an operative compressor.
d. Recover 75% of the refrigerant within 5 minutes.
(* b ) p.77.
32) The sale of CFC, HCFC, HFC, and HFO refrigerants to service or install refrigeration and Air conditioning equipment is ;
(* 냉동이나 에어컨 서비스에 필요한 냉매 CFC, HCFC, HFC, HFO 판매는. ? )
a. banned from use unless you have a recovery machine.
b. limited by law to HVAC Contractor's and/ or Mechanical Engineers.
c. allowed only if there is proof of need.
d. restricted to technicians who are EPA certified in refrigerant recovery.
(* d) p.64.
33) When servicing a small appliance found to be leaking, it is ;
(* 작은 공조기 냉매 누설시에. ? )
a. mandatory to repair the leak within 30 days.
b. mandatory to repair the leak only when the annualized leak rate exceeds 15% of the total charge.
c. not mandatory to repair the leak but it is recommended to do so whenever possible.
d. mandatory to recover all remaining refrigerant and dispose of the appliance.
(* c ) p.78
34 ) Which of the following best describes low loss fittings on refrigerant recovery devices used to recover CFCs, HCFCs, and HFCs ?
(* CFC, HCFC, HFC 냉매회수 하려 할때 , 회수기에 누설방지 밸브를 설치하려 할때의 설명은. ? )
a. They can be either manually closed or automatically closed when disconnected to prevent loss of refrigerant from hises.
b. They are used to connect the recovery device to an appliance and leak only small amounts of refrigerant during use.
c. They are used to connect the recovery device to an appliance and must be discarded after use.
d. They eliminate oil loss during recovery.
(* a )
35) All appliances must be equipped with a service aperture or process stub which is used when adding or removing from the appliance. What is typically used on small appliances ?
(* 모든 공조기에는 냉매를 충전하거나 회수하려 할때 게이지 설치할수 있는 장소를 마련하여야 하는데 작은 공조기에는 어떤것을 ? )
a. A straight piece of tubing that is entered using a piercing access valve.
b. A line located 15 inches below the compressor.
c. A valve installed at the factory which has a 1/4 inches diameter and machine threads.
d. A service aperture or process stub is not present because small appliances are exempt from this requirement.
(* a ) p.74.
36) A standard vaccum pump designed specifically for evacuation and dehydration can ;
(* 진공작업및 제습작업을 위한 진공펌프의 역할은 ? )
a. be used alone as a self-contained (* Active. ) recovery device.
b. never be used as recovery device in combination with a pressurized container.
c. be used alone as a substitute for any recovery device.
d. be used alone as a system dependent ( passive. )recovery device.
(* b ) p.76.
37) What is the service procedure if the refrigerant in a recovery cylinder is suspected to be contaminated. ?
(* 냉매회수 탱크의 냉매가 상했다고 의심할때의 대처방법은. ? )
a. Take a pressure reading of the cylinder.
b. Weigh the cylinder.
c. Discard the refrigerant.
d. Dilute the refrigerant with Virgin refrigerants.
(* a ) p.73.
38) Before beginning a refrigerant recovery procedure, it is ALWAYS necessary to ;
(* 냉매회수를 시작하기전, 항상 하여야 할 사항은 ? )
a. allow the appliance to stabilize at room temperature.
b. know the type of refrigerant that is in the system.
c. remove the appliance to an outdoor location.
d. disconnect the appliance from its power source.
(* b ) p.72.
39) What should a technician do if the refrigerant in a recovery cylinder is suspected to be contaminated ?
(* 냉매회수 탱크의 냉매가 상했다고 의심할때의 대처 방법은 ? )
a. Turn refrigerant in for reclamation.
b. Weigh the refrigerant.
c. Discard the refrigerant.
d. Dilute the refrigerant with Virgin refrigerants.
(* a ) p.82.
40) Which of the following is a true statement regarding a refrigerant that can be used as a direct service " drop in " substitute for R-22 ?
(* R-22의 대체냉매를 곧바로 충전하여 사용할수 있는 정답은 ? )
a. R-134a used with a TEV.
b. R-410A used with a TEV that has MOP of 75 psig.
c. R-290 with a fixed orifice Metering device.
d. There is no such thing as a " drop in. " substitute.
(* d ) p.25.
41) If a reclamation facility receives a tank of mixed refrigerant, they may,
(* 만약에 재활용 냉매 회수 장소에서 서로 섞인 냉매 처리는 ? )
a. refused to accept the refrigerant or charge extra for processing it.
b. vent the refrigerant.
c. resell the refrigerant.
d. agree to separate the refrigerant, by the fracking process.
(* a )p.82.
42 ) A passive system -dependant recovery process for small appliances ;
(* 간접적인 냉매회수 방법//Passive recovery이란 ? )
a. still use a pump to recover refrigerant.
b. must use a Pressure relief device when recovering refrigerant.
c. captures refrigerant in a non-pressurized container.
d. can only be performed on a system with an operating compressor.
(* c ) p.73.
43) When recovering CFC, HCFC, HFC refrigerant into a non- pressurized container from a household refrigerators with an inoperative compressor it is ;
(* 가정용 냉장고의 콤푸가 고장난 경우, 압력이 없는 컨테이너에 CFC, HCFC, HFC냉매를 회수하려면. ? )
a. helpful to heat and strike the compressor with a rubber Mallets.
b. only necessary to recover as much refrigerant as will naturally flow out of the system.
c. not necessary to recover since the refrigerant is properly contaminated.
d. necessary to chase refrigerant from the oil with pressurized nitrogen.
(* a )p.74.
44) When installing any type of access fitting onto a sealed system ;
(* 밀폐시스템에 게이지 밸브 설치하려 할때의 주의 사항은 ? )
a. the fitting should be leak tested before proceeding with recovery.
b. it is not necessary to leak test and access fitting.
c. the fitting need not be leak tested until the total repair is completed.
d. the system must be pressurized with oxygen-free dry nitrogen before leak testing can be attempted.
(* a )p.75.
45) When R-410A is recovered from an appliance, it ;
(* R-410A 를 공조기로 부터 회수하려 할때 ; )
a. can be mixed with either R-32 or R-125 during the recovery process, since R-410A is a mixture of those two refrigerants.
b. can be mixed with R-134a but not R-22 during the recovery process.
c. need not be recovered since R-410A is not one of the refrigerant recovered by the Clean Air Act.
d. should be recovered into a recovery vessel that is clearly marked to ensure that mixing of refrigerants does not occur.
(* d ) p.78.
46) Which of the following are recommended Safety work practices when recovering refrigerants ?
(* 냉매화수 작업중 안전한 작업방법은. ? )
a. Wear Safety Eyewear and butyl-lined gloves when connecting/disconnecting hoses.
b. Wear a respirator when working with any refrigerant.
c. Wear cotton gloves when working with any compressed gas.
d. Ventilation is only necessary if oil, appearing as a white cloud or fog, is emitted during the recovery procedure.
(* a )p.79.
47) When using nitrogen in repairing a sealed refrigeration system, what should the nitrogen tank always be equipped with ?
(* 밀폐된 냉매 시스템에 질소 사용하려 할때, 반듯이 사용하여야 할 사항은 ? )
a. Regulator.
b. Float sensor.
c. Red top.
d. Hand valve.
(* a )p.78.
48) What acids can CFC, HCFC Refrigerants decompose into a high temperatures. (* e.g. open flames, glowing metal surfaces, etc ) ?
(* CFC, HCFC에 포함된 산성 성분이 높은 열에 닿을때 (* 불꽃, 달구어진 메탈. )생성되는 성분은 ? )
a. Boric and chronic acids.
b. Sulfuric and phosphoric acids.
c. Hydrochloric and Hydrofluoric acids.
d. Phosphoric and dodecylbenzensulforic acid.
(* c ) p.78.
49) What gas can CFC, HCFC Refrigerants decompose into at high temperatures, (* open flames. , glowing metal surfaces, ete,. ) ?
(* CFC, HCFC에 포함된 산성성분이 높은열에 닿을때 (* 불꽃, 달구어진 메탈. )생성되는 성분은 ? )
a. Hydrazine gas.
b. Phosegen gas.
c. Helium gas.
d. Tetraethyl gas.
(* b ) p.79.
50) If a large leak of refrigerant occurs such as from a filled cylinder in an enclosed area, what action should be taken when no self-contained breathing Apparatus is available ?
(* 대량의 냉매가 가득찬 탱크에서 , 혹은 밀폐된 공간에서 누설사고가 난 경우, 산소호흡기가 없다면 ? )
a. Use butyl lined gloves and try to stop the leak.
b. Use a leak detector to locate the leak and try to stop the leak.
c. Vacate and naturally ventilate the area.
d. Make sure the unit is de-energized, close the service valves and try to stop the leak.
(* c )p.79.
■■■ 타입 II.
(* 고압//고고압 공조 냉매취급자격증 51번 부터 75번까지 속하며 적어도 70%, 18문제이상을 맞아야 합니다. )
51) When first inspecting a hermetically system known to be leaking, you should look for ;
(* 누설이 의심되는 밀폐콤푸의 검증은 ? )
a. frost on the tubing.
b. puddles of refrigerant.
c. particles of filter driers core.
d. traces of oil.
(* d )
52) Which part of a belt-driven non- hermetic compressor is most likely to leak if the compressor has not been used for several months ?
(* 벨트로 가동되는 반밀폐 콤푸를 몇달동안 쓰지 않고 세워 놓았을 경우, 누설확율이 높은 부분은. ? )
a. Suction service valve.
b. Rotating shafts seal.
c. one or both of the king valve.
d. Head gasket on discharge side.
(* b )
53 ) When a trace gas becomes absolutely necessary, which of the available gases should be used to help locate leak. !
(* 누설검증시 질소개스 사용이 필요하다면, 같이 섞어 누설검증 할수 있는 경우는. ? )
a. Nitrogen with HCFC-22.
b. R-22 due to its Universal system compatibility and it's miscibility with various oils.
c. Nitrogen with a trace amount of the system's design refrigerant.
d. Nitrogen with HFC-R 410A.
(* c ) p.63.
54) Starting in 2019, what leak rate triggers the EPA requirements that commercial refrigeration system containing 50 pounds of or more of R-22 be repaired ?
(* 2019년도를 중심으로 R-22 사용 50 파운드 이상 사용 상업용 냉장고 년간 누설 허용량은 ? )
a. 10%.
b. 20%
c. 30%.
d. 35%.
(* b )p.125.
55) A chiller for comfort Cooling that contains 50 pounds or more of R-123 is leaking.
Starting in 2019, at what leak rate does the EPA requirements that the equipment being repaired. ?
(* 냉방을 위한 칠러에. R-123, 50파운드 이상 충전된 공조기는, 2019년이후에 누설허용량은 ? )
a. 5 %.
b. 10% .
c. 15% .
d. 20 %.
(* b ) p.125.
56) Which leak repair category does the EPA define as Air-conditioning appliances used to provide Cooling in order to control heat and/or humidity in occupied facilities including, but, not limited to, residential, office, and commercial buildings ?
(* EPA 가 규정하는 누설규제 문제에, 냉난방 가습을 제공하는 가정용, 오피스및 상업용 시설은 어느 카테고리에 속할까요 ? )
a. Commercial Refrigeration.
b. Industrial Process Refrigeration.
c. Comfort Cooling.
d. Ice making refrigeration.
(* c ) p.126.
57) Which leak repair category does the EPA define as the refrigeration appliances used in the retail food and cold storage warehouse sectors. ?
(* EPA에서 규정하는 소매상 식품점, 냉동식품 보관 창고는 어느 카테고리에 속할까요 ? )
a. Commercial Refrigeration.
b. Industrial Process Refrigeration.
c. Comfort Cooling.
d. Ice making refrigeration.
(* a ) p.127.
58) When recovery is first started, at what phase is the refrigerant removed to save recovery time. ?
(* 냉매를 회수 하려할때 시간절약을 하려고 하면. ? )
a. Recovery phase.
b. Recycle phase.
c. Liquid phase.
d. Vapor phase.
(* c )p.127.
59) Where must you connect a hose in order to recover liquid refrigerant ?
(* 냉매를 액상으로 회수하려 할때, 호스를 어디에 연결하여야 할까요. ? )
a. The compressor suction valve.
b. The compressor discharge valve.
c. The liquid line.
d. The condenser inlet. .
(* c )p.127.
60) Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following ?
(* 냉매회수할때 기체 형태의 냉매회수는 무엇을 손해 볼것을 방지하려 할까요. ? )
a. water.
b. oil.
c. refrigerants.
d. Non-condensibles.
(* b ) p.88.
61) After liquid refrigerant has been recovered from the appliance, any remaining vapor is ;
(* 액상의 냉매회수 한후에 나머지 기체상태의 냉매는. ? )
a. purged to the atmosphere.
b. isolated in the appliance.
c. pumped into appliance receiver.
d. removed by the recovery system.
(* d )p.88.
62) Which of the following statement about recycling and recovery equipment used for stationery refrigeration is FALSE ?
(* 냉매회수및 환수기의 요구수준에 맞지 않는것은 ? )
a. It must be tested by an EPA -approved third party.
b. Purchases of such equipment must be reported to the EPA.
c. It must be equipped with low-cost fittings.
d. Equipment design to recover flammable refrigerant must meet a specific. U.L. Safety standard.
(* d ) p.129.
63) 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 follow ?
(* R-404A 냉매 40파운드 공조기의 콤푸를 띠여 내기 위한 작업은 ? )
a. Simply remove the compressor and cap the ends,
b. Evacuate the isolated section of the system to atmospheric pressure, then removed the compressor.
c. Evacuate the isolated section of the system to 0 psig and if system pressure does not rise after a few minutes, remove the compressor.
d. Evacuate the isolated section of the system to 5 incest of vaccum and when the system's pressure rises out of the vaccum, remove the compressor.
(* c ) p.91.
64) What should be done after reaching the required recovery vaccum on an appliance ?
(* 냉매회수 및 환수하려 할때 요구사항, 진공에 다다르면 그이후의 작업은 ? )
a. Immediately disconnect the recycling or recovery equipment, and open the system for service.
b. Wait for at least a few minutes to see if the system pressure rises.
c. Break the vaccum with nitrogen and open the system for service.
d. Pressurize the system with nitrogen and perform a leak check.
(* b ) p.92.
65) What is the state of the refrigerant leaving the receiver in a refrigeration system ?
(* 공조기 수액기를 통하여 나올때의 냉매 형태는. ? )
a. Low pressure liquid.
b. Low pressure vapor.
c. High pressure liquid.
d. High pressure vapor.
(* c ) p.7.
66) Identify the best method to charge a system that has both an air-cooled condenser and evaporator with a name plate charge of 80 pounds.
(* 공냉식 응축기와 기화기 네임 플레이트에 80 파운드라 표시되여 있을때 , 가장 적당한 충전방법은. ? )
a. Vapor charge through the suction service valve.
b. Liquid charge through the discharge service valve.
c. Liquid charge through the suction service valve.
d. Liquid charge through the liquid -line service valve.
(* d )
67) What is the easiest way to check the type of refrigerant used in a 60 ton packaged rooftop unit ?
(* 60톤 일체형 냉매의 종류를 쉽게 알수 있는 방법은 ? )
a. Look at the name plate.
b. Use your service gauge set and P/T chart.
c. Ask the owner.
d. Measure the condenser pressure.
(* a )
68) Which of the following should be replaced it a system is opened for servicing ?
(* 공조기 수리 교체 작업시에 반듯이 교체하여야 할 품목은 ? )
a. Filter-Drier.
b. Thermostat.
c. Metering device.
d. Crankcase heater.
(* a ) p.88.
69 ) What level of vacuum should be pulled when Evacuating a vapor Compression system to assure all moisture has been removed ?
(* 공조기 콤푸의 수분제거시의 잔공범위는 ? )
a. 2 mm Hg.
b. 1 mm Hg.
c. 1000 microns.
d. 500 microns.
(* d )p.116.
70) What area of a refrigeration system does oil foaming usually occur ?
(* 공조기 가동중 오일에 거품이 생기는 것을 볼수 있는 곳은 ? )
a. Condenser.
b. Evaporator.
c. Compressor.
d. Expansion devices.
(* c ) p.43.
71) What is the components directly following the condenser in a refrigeration system using a thermal expansion valve ?
(* 공조기 배관/냉매의 흐름중에 팽창밸브 사용시에 응축기 다음에 있어야할 부품은 ? )
a. Receiver.
b. Compressor.
c. Accumulator.
d. Evaporator.
(* a) p.7~8.
72) What would be the approximate refrigerant pressure of an R- 410A machine at (* 80°F )
room temperature while the machine is idle ?
(* 공조기가 가동하지 않고 서있는 동안, R-410A /실내온도 화씨80도/섭씨 26.7도의 경우 압력은. ? )
a. 143 psig.
b. 212 psig.
c. 238 psig.
d. 260 psig.
(* c )
73) What is the deep vaccum usually measured in ?
(* 진공의 단위는 ? )
a. psig.
b. psia.
c. inches of Hg.
d. microns.
(* d )p.118.
74) 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 ?
(* 어느 종류의 냉매가 기계실 냉매누설 경보기 없이 계속하여 환풍기가 ASHRAE-15 규정에 의하여 가동하여야 하는 냉매는 ? )
a. R-134a.
b. R- 404A.
c. R- 410A.
d. R-717.
(* d ) p.130.
75) When could a reciprocating compressor be damaged if energized. ?
(* 왕복운동 콤푸를 가동시키려 할때 잘못 고장날 이유는. ? )
a. When the discharge service valve is closed.
b. When the suction valve is open.
c. When the discharge valve is open.
d. When the demand for cooling is at a steady state.
(* a ) p.84.
■■■ 타입 III: 저압 (* 최근에는 대형 터보 포함 ) Low Pressure Appliance.
(* 문제 76번에서 100번을 다루며 70%를 통과하셔야 합니다. )
76) A hydrostatic tube test kit will,
(* 수압 누설 테스트 재료란. ? )
a. determine if a tube leaks.
b. blow all water out of tubes.
c. remove water from a machine.
d. vent refrigerant to the atmosphere.
(* a )p.125.
77) When leak testing a Low-pressure Centrifugal Centreville with nitrogen, what is the maximum test pressure. ?
(* 저압시스템에서 질소사용 누설검사시에 최고 압력 허용치는 ? )
a. 0 psig.
b. 10 psig.
c. 25. psig.
d. 50 psig.
(* b ) p.125.
78) Charged low pressure refrigeration machines may be most efficiently leak check by ;
(* 충전된 저압시스템 누설검사를 원활하게 하려면. ? )
a. adding dry nitrogen to increase the pressure.
b. adding refrigerant leak detection tracer dye.
c. adding heat with circulated hot water or Heating blankets.
d. operating the purge system to see how much air comes out.
(* c )
79) What should be done to reduce refrigerant loss from a purge unit on a R-123 chiller ?
(* R-123 사용하는 터보냉동 퍼장할때 최소한도의 누설감소를 위해서 할일은. ? ).
a. Leak test and repair the chiller.
b. Seal the purge unit discharge line.
c. Pipe purge unit back into the low side.
d. Pipe purge unit back into recovery unit.
(* a ) p.124 ~ 125.
80) Starting in 2019, EPA Regulations require that all chillers containing 50 or more pounds of ozone depleting refrigerant that are used for comfort Cooling be repaired when the leak rate exceeds ;
(* EPA 에서는 2019년부터 편의 냉방기 사용 냉매가 50파운드 이상 사용시의 년간 누설 허용량 ? )
a. 5% of the charge per year.
b. 10% of the charge per year.
c. 20% of the charge per year.
d. 30% of the charge per year.
(* b ) p.125.
81) Starting in 2019, EPA Regulations require that leaking industrial process refrigeration with ozone-depleting refrigerant be repaired ( or retrofitted or retired. )When the leak rate exceeds;
(* 2019년이후 공업용 냉동사스템이 년간 누설량을 넘을 경우, 수리 (* 개선/폐기. )할때의 허용량은. ? )
a. 5% of the charge per year.
b. 10% of the charge per year.
c. 20% of the charge per year.
d. 30% of the charge per year.
(* d ) p.125.
82) The EPA 's leak repair requirements apply to appliances with a charge size of ;
(* EPA 누설 수리 요구 사항은 충전무게가 얼마 ? )
a. 5 pounds or less.
b. 30 pounds or greater.
c. 50 pounds or greater.
d. 100 pounds or greater.
(* c ) p.125.
83) A typical setting for the high pressure cut-out control on a recovery unit used for Evacuating the refrigerant from a Low-pressure chiller is ;
(* 저압터보 냉동 회수기 사용시에 고압안전 셋팅은. ? )
a. 2 psig.
b. 5 psig.
c. 10 psig.
d. 15 psig.
(* c )p.125.
84) Refrigerant removal from a Low-pressure system starts with ;
(* 저압시스템의 냉매회수 시작은. ? )
a. Vapor removal.
b. liquid removal.
c. Vapor and liquid removal.
d. oil separation.
(* b. ) p.127.
85 ) What must be done after recovering the liquid refrigerant from a Low-pressure chiller ?
(* 저압 터보냉동 냉매액상 화수후에 할 일은 ? )
a. Recovered the vapor refrigerant.
b. Pressurize the system with nitrogen.
c. Separate the oil from the system.
d. Solvent flush the entire system.
(* a ) p.127.
86) After system serving , and recharging, why is refrigerant vapor re-introduced to the chiller before refrigerant liquid. ?
(* 시스템 수리후에, 냉매 재충전 할때, 액상 충전하기전, 기체로 충전하는 이유 ? )
a. Vapor charging increase pressure slowly, preventing failure of the rupture disk.
b. Vapor charging is faster than liquid charging.
c. Liquid charging is more difficult to control than vapor charging.
d. Liquid charged into a deep vaccum will evaporate and may lower the temperature freezing water in the heat exchanger tube bundle.
(* d ) p.129.
87) Charging liquid R-245fa into a Low-pressure refrigeration system under a vaccum greater than 18 inches Hg vaccum can cause the ;
(* R-245fa 냉매를 저압 터보냉동에 18인치 진공상태에 충전한다면. ? )
a. liquid to absorb excess moisture.
b. purge unit to operate.
c. system water to freeze.
d. system water to boil.
(* c ) R-245fa. = Pentafluoropropane. 0 psig. = 15.3 ° C. 14.6" vaccum. = -70°C.
88) However do you determine when enough vapor has entered the refrigeration system before you charge refrigerant liquid. ?
(* 무엇으로 냉매액상 충전하기전 , 충분한 기체가 충전되었다 볼수 있나요 ? ).
a. Refrigerant saturation temperature increase above 32 °F.
b. Recovery unit liquid level drops to a lower pressure.
c. Vapor is charged for 15 minutes and then liquid is added.
d. Recovery unit pressure drops to a lower pressure.
(* a. ) p.129.
89) What should you do after reaching the required recovery vaccum on a Low-pressure appliance ?
(* 요구하는 회수 진공범위에 도달하면, 다음 과정은 ? )
a. immediately disconnect the recycling or recovery equipment, and open the system for service.
b. Wait for at least a few minutes to see if the system pressure rises before charging.
c. Break the vaccum with nitrogen and open the system for service to begin charging liquid.
d. Pressurize the system with nitrogen and perform a leak check.
(* b ) p.129.
90) Which of the following action would always be considered " major. " under EPA's regulations ?
(* 환경청의 규정상 " major//대공사. " 란. ? )
a. Replacement of an evaporator coil.
b. Replacement of a filter driers.
c. Replacement of a switch.
d. Replacement of a purge unit.
(* a) p.112.
91) When should an appliance NOT be evacuated all the way to the prescribed level ?
(* 공조기 진공회수를 정하여진 레벨로 하지 않아도 되는 경우는 ? )
a. When performing a major repair followed by a minor repair.
b. When the repair is followed by an evacuation of the appliance to the environment.
c. When leaks in the appliance make evacuation to the prescribed level unattainable.
d. When the appliance is being disposed of at a later date.
(* c) p.112.
92) What is the primary purpose of a purge unit on a Low-pressure chiller ?
(* 저압 터보냉동에서 퍼징이란 ? )
a. Remove refrigerant from the system.
b. Condense air out of the system.
c. Condense water out of the system.
d. Remove non-condensibles from the system.
(* d ) p.124
93) Where does the purge unit on a Centrifugal system take its suction ?
(* 터보냉동의 퍼징 유닛 장소는. ? )
a. Top of the condenser.
b. Compressor oil sump.
c. Top of the evaporator.
d. Suction elbow.
(* a ) p.124.
94) What is meant by the term " high efficiency purge unit. ? "
(* 고효율 퍼징 유닛이란. ? )
a. Purge units that discharge a high percentage of refrigerant with the air they remove.
b. Purge units that discharge a low percentage of refrigerant with the air they remove.
c. Purge units that consumers less than 5 watts of electrical power.
d. Purge units which contain less than 50 lbs of refrigerant.
(* b) p.124.
95.) ASHRAE Standard 15-2013 requires the use of room sensors and alarms to detect ;
(* ASHRAE15-2013. 요구사항인 센서와 경보는 무엇을 기준으로. ? )
a. refrigerant leaks.
b. high levels of ozone.
c. refrigerants contamination.
d. excessive oxygen levels.
(* a ) p.129.
96 ) ASHRAE Standard 15-2013 requires the use of room sensors and alarms to detect ;
(* ASHRAE 15-2013의 센서와 경보는 무엇을 찾아서 ? )
a. A 1. refrigerants.
b. B 2 refrigerants.
c. A2 refrigerants.
d. all refrigerant Safety groups.
(* d ) p.129.
97) When does ASHRAE Standard 15 - 2013 require that each machinery room activate an alarm and mechanical ventilation ?
(* ASHRAE 15-2013 요구사항으로 기계실 센서나경보및 환기는 무엇을 기준으로. ? )
a. When the TLV-TWA. (* Threshold Limit Value. - Time Weighted Average ) is exceeded.
b. When the UTL . (* Upper Threshold Limit. ) is exceeded.
c. When the COP. (* Coefficient of Performance. ) drops 5% of the original value.
d. When the EEL. (* Emergency Exposure Limit. ) is exceeded by 10%.
(* a )p.129
98) Which of the following Safety precautions should be adhered to for Low-pressure systems. ?
(* 저압시스템의 작업시 안전사항은 ? )
a. Use gloves and safety goggles when working with liquid refrigerant.
b. Reset the water freezestat after recharging.
c. Shut down the compressor before removing the gauge from the low side of the system.
d. Use a refrigerant leak detector before entering the mechanical room.
(* a. ) p.130.
99) Which of the following statements about R-123 3rd is FALSE. ?
(* R-123 3rd 냉매를 설명하는것중 사실이 아닌것은. ? )
a. It is a SNAP approved replacement for Low-pressure Centrifugal compressor systems.
b. It is being considered for applications where R-123 might have been used.
c. It is suitable for Air-conditioning application server where Cooling water is used. (* large chiller applications )
d. It is mildly flammable.
(* d. ) P/T chart.
100 ) What must a system owner do, once the threshold leak rate has been exceeded on any Low-pressure system using an ozone-depleting refrigerant ?
(* 저압 터보냉동에서 오존파괴 냉매사용 규정량 초과 누설시에 소비자로서 할 의무사항은. ? )
a. Retire the appliance the following year.
b. Repair all of the leaks and submit a report about the repair to the EPA.
c. Immediately mothball the appliance until it is retrofitted.
d. Repair the appliance enough to bring the leak rate below the threshold, retrofit, or retired the appliance.
(* b. )p.63~ 68.
■■■■ end of type III section.
■■■■ 이상으로 70 시리즈 개정된 연습문제 올려보았읍니다. 금년 하반기에는 좀더 새롭고 업그레이드 된 70 시리즈 후속 문제가 재편집되여 나올것으로 추진되고 있기에 새로운 프로그램 소개및 재훈련 교육 프로그램 기대하여준비하여 보려 합니다.
■■■■ 냉매회수는 공조인의 의무사항입니다.
■■■■ 냉매취급자격증 소자는 공조인의 의무사항입니다.
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