{"product_id":"washington-dc-master-refrigeration-air-conditioning-mechanical-limited-book-package","title":"Washington DC Master Refrigeration \u0026 Air Conditioning Mechanical Limited Book Package","description":"\u003ch1 style=\"color: #d32f2f;\"\u003eWashington DC Master Refrigeration \u0026amp; Air Conditioning Mechanical Limited Book Package\u003c\/h1\u003e\n\n\u003cp\u003ePrepare for the \u003cstrong\u003eWashington DC Master Refrigeration \u0026amp; Air Conditioning Mechanical Limited examination\u003c\/strong\u003e with a focused book package designed around the mechanical-code and HVACR subjects covered on the current District of Columbia exam. This package includes the \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e and \u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e for study of refrigeration theory, air-conditioning systems, piping, equipment, airflow, controls, refrigerants, safety, maintenance, and repair.\u003c\/p\u003e\n\n\u003cp\u003eThe District of Columbia regulates refrigeration and air-conditioning mechanics through the \u003cstrong\u003eBoard of Industrial Trades\u003c\/strong\u003e. The limited master credential applies to qualifying refrigeration and air-conditioning work involving equipment below the District's limited-license horsepower threshold.\u003c\/p\u003e\n\n\u003cp\u003eThe current PSI examination is identified as \u003cstrong\u003e322 Washington DC Master Refrigeration and Air Conditioning Mechanic Limited\u003c\/strong\u003e. It covers refrigeration and air-conditioning theory, system types, terminology, piping, compressors, condensers, evaporators, chillers, cooling towers, heat pumps, appliances, conditioned-air systems, ductwork, electrical fundamentals, controls, refrigerants, operating procedures, safety, maintenance, and repairs.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e provides the mechanical-code foundation for preparation. It includes requirements affecting refrigeration systems, mechanical appliances, ventilation, duct systems, combustion air, piping, condensate disposal, equipment installation, and other mechanical-system requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e supports the technical side of preparation with detailed HVACR material covering refrigeration cycles, system components, heat transfer, electrical controls, refrigerants, service procedures, troubleshooting, air-conditioning systems, and equipment operation.\u003c\/p\u003e\n\n\u003cp\u003eThe Washington DC Master Refrigeration and Air Conditioning Mechanic Limited examination is an \u003cstrong\u003eopen-book test\u003c\/strong\u003e. Candidates should prepare not only by learning HVACR concepts but also by practicing efficient reference navigation so they can locate applicable mechanical-code requirements within the available testing time.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Details\u003c\/h2\u003e\n\n\u003cp\u003eThe current examination is identified as \u003cstrong\u003e322 Washington DC Master Refrigeration and Air Conditioning Mechanic Limited\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe examination contains \u003cstrong\u003e70 multiple-choice questions\u003c\/strong\u003e and provides candidates with a \u003cstrong\u003e3-hour time limit\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe current examination content outline is:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eTheory, System Types, Terminology, and General Requirements – 16%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRefrigerant and Condensate Piping – 18%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eEvaporators, Compressors, Condensers, Chillers, Cooling Towers, Heat Pumps, Heating and AC Appliances – 15%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eConditioned Air, Supply, Return, Makeup, Combustion Air, Air Ducts, Dampers, and Insulation – 15%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eElectrical Fundamentals and Controls – 9%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eRefrigerants – 10%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eOperating Procedures, including Safety – 9%\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMaintenance and Repairs – 8%\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigerant and Condensate Piping\u003c\/strong\u003e is the largest individual category at 18%. Theory, System Types, Terminology, and General Requirements represent 16%. Major HVACR equipment and Conditioned Air\/Duct Systems each account for another 15%.\u003c\/p\u003e\n\n\u003cp\u003eThe exam therefore requires broad knowledge rather than concentration on one single subject. Candidates should understand refrigeration theory and equipment operation while also being able to work with mechanical-code provisions affecting piping, ducts, ventilation, combustion air, appliances, and refrigeration systems.\u003c\/p\u003e\n\n\u003cp\u003eWith 180 minutes available for 70 questions, candidates have an average of approximately \u003cstrong\u003e2.6 minutes per question\u003c\/strong\u003e. Efficient reference navigation and familiarity with common HVACR calculations can help candidates manage the exam effectively.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eOpen Book Test\u003c\/h2\u003e\n\n\u003cp\u003eThe Washington DC Master Refrigeration and Air Conditioning Mechanic Limited examination is an \u003cstrong\u003eopen book test\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe current PSI examination bulletin identifies the \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e as an approved reference. It also lists \u003cstrong\u003eModern Refrigeration and Air Conditioning, 2004\u003c\/strong\u003e among the approved exam-room references for examination 322.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e included in this package is intended as a comprehensive HVACR study resource. Candidates should use the specific edition listed by PSI when selecting books to bring into the examination room.\u003c\/p\u003e\n\n\u003cp\u003eThe 2012 International Mechanical Code is particularly important for questions involving refrigeration piping, mechanical equipment, ductwork, ventilation, combustion air, condensate, appliances, equipment clearances, and other installation requirements.\u003c\/p\u003e\n\n\u003cp\u003eOpen-book testing requires familiarity rather than simple access to the books. Candidates should practice determining whether a question calls for a mechanical-code lookup or technical HVACR knowledge before beginning a search.\u003c\/p\u003e\n\n\u003cp\u003eFor example, a question about the operation of a compressor may rely primarily on refrigeration theory, while a question involving refrigeration-system installation, piping, equipment location, or ventilation may require the International Mechanical Code.\u003c\/p\u003e\n\n\u003cp\u003eReference books are subject to PSI examination-center rules and inspection. Candidates should organize their approved references before exam day and practice using them during timed study sessions.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eLicensing Steps\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eDistrict of Columbia Board of Industrial Trades\u003c\/strong\u003e regulates refrigeration and air-conditioning mechanics and contractors. Candidates seeking a Master Refrigeration and Air Conditioning Mechanic Limited credential must satisfy the experience, certification, examination, and application requirements that apply to the limited master category.\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfirm that the limited master credential matches your intended scope.\u003c\/strong\u003e The District defines limited refrigeration and air-conditioning work according to equipment horsepower.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete the required qualifying experience.\u003c\/strong\u003e A Master Mechanic Limited applicant must document at least five consecutive years of qualifying refrigeration and air-conditioning experience immediately before applying.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMake sure the experience is within the limited scope.\u003c\/strong\u003e The qualifying work must involve refrigeration and air-conditioning systems below the limited-license horsepower threshold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eObtain CFC certification.\u003c\/strong\u003e District law requires proof of chlorofluorocarbon certification for the Master Mechanic Limited credential.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDocument your employment.\u003c\/strong\u003e Qualifying experience must be verified in writing by a licensed master mechanic.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGather application documents.\u003c\/strong\u003e Current Board information identifies employment verification and CFC certification among the documents applicable to refrigeration applicants.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSubmit the licensing application.\u003c\/strong\u003e Apply through the District's occupational and professional licensing process.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSchedule the examination.\u003c\/strong\u003e Washington DC refrigeration and air-conditioning trade examinations are administered through PSI.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrepare with the applicable references.\u003c\/strong\u003e Study the 2012 International Mechanical Code and comprehensive HVACR material according to the published exam outline.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTake examination 322.\u003c\/strong\u003e The current exam contains 70 multiple-choice questions and provides three hours.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete the remaining licensing requirements.\u003c\/strong\u003e Follow the District's instructions after satisfying the examination and application requirements.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eThe individual Master Refrigeration and Air Conditioning Mechanic Limited credential should be distinguished from a \u003cstrong\u003eRefrigeration and Air Conditioning Contractor Limited license\u003c\/strong\u003e. A contractor credential is a separate business-related license with its own requirements.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eState Requirements\u003c\/h2\u003e\n\n\u003cp\u003eWashington DC is a federal district rather than a state, but refrigeration and air-conditioning work is regulated through the \u003cstrong\u003eDistrict of Columbia Board of Industrial Trades\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eDistrict law distinguishes between regular and limited master refrigeration and air-conditioning mechanics. A \u003cstrong\u003eMaster Mechanic Limited\u003c\/strong\u003e applicant must establish at least \u003cstrong\u003efive consecutive years of qualifying experience immediately preceding the application\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe experience must involve installing, maintaining, repairing, and replacing refrigeration and air-conditioning equipment systems \u003cstrong\u003eless than 25 compressor horsepower or the equivalent tons of refrigeration in the aggregate\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe qualifying experience must be \u003cstrong\u003everified in writing by a master mechanic\u003c\/strong\u003e. This verification establishes that the applicant has performed the type and duration of HVACR work required for the limited master credential.\u003c\/p\u003e\n\n\u003cp\u003eDistrict law also requires a Master Mechanic Limited applicant to have \u003cstrong\u003eproof of chlorofluorocarbon certification\u003c\/strong\u003e. Current District licensing instructions identify CFC certification as an applicable requirement for master refrigeration and air-conditioning applicants.\u003c\/p\u003e\n\n\u003cp\u003eThe District's current refrigeration licensing instructions describe limited mechanical work as work performed on equipment at or below \u003cstrong\u003e25 compressor horsepower\u003c\/strong\u003e. Candidates should understand this limited classification when choosing between the limited and regular master licensing pathways.\u003c\/p\u003e\n\n\u003cp\u003eThe Board of Industrial Trades requires refrigeration applicants to submit applicable documentation such as CFC certification and employment verification. General application requirements also include a passport-style photograph, government-issued identification, and payment information for applicable fees.\u003c\/p\u003e\n\n\u003cp\u003eWashington DC Refrigeration and Air Conditioning licenses currently expire on \u003cstrong\u003eSeptember 30 of even-numbered years\u003c\/strong\u003e. Renewal is handled separately from the initial licensing and examination process.\u003c\/p\u003e\n\n\u003cp\u003eThe individual master mechanic credential is not the same as a \u003cstrong\u003eRefrigeration and Air Conditioning Contractor Limited\u003c\/strong\u003e license. Businesses performing contracting work must separately satisfy the District's contractor requirements.\u003c\/p\u003e\n\n\u003cp\u003eCurrent District trade-contractor requirements include proof of business registration or a Certificate of Good Standing, a designated DC-licensed master tradesperson, and the applicable refrigeration and air-conditioning bond.\u003c\/p\u003e\n\n\u003cp\u003eWashington DC currently identifies a \u003cstrong\u003e$5,000 company bond\u003c\/strong\u003e and a \u003cstrong\u003e$5,000 designated master bond\u003c\/strong\u003e for refrigeration and air-conditioning contracting. Those contractor requirements are separate from the individual examination and master mechanic licensing requirements.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eReference Books\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe mechanical-code reference identified for the current Washington DC Master Refrigeration and Air Conditioning Mechanic Limited examination. It covers ventilation, exhaust systems, duct systems, combustion air, appliances, refrigeration systems, piping, condensate disposal, mechanical equipment, and related installation requirements.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eA comprehensive HVACR study resource covering refrigeration theory, heat transfer, compressors, evaporators, condensers, heat pumps, refrigerants, electrical fundamentals, controls, air-conditioning systems, airflow, troubleshooting, maintenance, safety, and service procedures.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eExam Room Approved Books\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe current PSI examination bulletin identifies the 2012 International Mechanical Code as an approved reference for examination 322.\u003c\/span\u003e\n\u003c\/li\u003e\n\n  \u003cli\u003e\n\u003cstrong\u003eModern Refrigeration and Air Conditioning, 2004\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThe current PSI examination bulletin identifies the 2004 edition of Modern Refrigeration and Air Conditioning as an approved exam-room reference for examination 322.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition is included in this package for study and technical review.\u003c\/strong\u003e Candidates should follow PSI's current approved-reference listing when selecting the edition they bring to the testing center.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eTest Information and Study Materials\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eTheory, System Types, Terminology, and General Requirements\u003c\/strong\u003e account for 16% of the examination. Candidates should review refrigeration cycles, heat transfer, pressure-temperature relationships, sensible and latent heat, superheat, subcooling, system classifications, HVACR terminology, and general mechanical principles.\u003c\/p\u003e\n\n\u003cp\u003eUnderstanding how the refrigeration cycle works provides a foundation for many other examination topics. Candidates should understand what happens to refrigerant as it moves through the compressor, condenser, metering device, and evaporator.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigerant and Condensate Piping\u003c\/strong\u003e represents \u003cstrong\u003e18%\u003c\/strong\u003e, making it the largest examination category. Review refrigerant pipe materials, routing, sizing concepts, supports, insulation, joints, equipment connections, condensate drains, traps, and mechanical-code provisions affecting piping installations.\u003c\/p\u003e\n\n\u003cp\u003eCandidates should understand both the technical reason for proper refrigerant piping and the mechanical-code requirements governing installation. Incorrect piping can affect oil return, refrigerant movement, equipment performance, and condensate disposal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEvaporators, Compressors, Condensers, Chillers, Cooling Towers, Heat Pumps, Heating and AC Appliances\u003c\/strong\u003e account for \u003cstrong\u003e15%\u003c\/strong\u003e. Review component operation, equipment relationships, installation considerations, heat-transfer principles, and common service conditions.\u003c\/p\u003e\n\n\u003cp\u003eStudy compressor operation and common compressor types, evaporator heat absorption, condenser heat rejection, heat-pump operation, and the role each component plays in the refrigeration cycle.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eConditioned Air, Supply, Return, Makeup, Combustion Air, Air Ducts, Dampers, and Insulation\u003c\/strong\u003e also represent \u003cstrong\u003e15%\u003c\/strong\u003e. Candidates should understand supply and return air, ventilation, makeup air, combustion air, duct materials, duct installation, dampers, insulation, and airflow principles.\u003c\/p\u003e\n\n\u003cp\u003eMechanical-code navigation is particularly useful in this area because many duct, ventilation, and combustion-air questions are tied directly to code requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eElectrical Fundamentals and Controls\u003c\/strong\u003e represent 9%. Review voltage, current, resistance, motors, transformers, relays, contactors, capacitors, thermostats, switches, control circuits, safety controls, and HVACR wiring diagrams.\u003c\/p\u003e\n\n\u003cp\u003eCandidates should be comfortable tracing a basic control circuit and recognizing how an electrical component affects system operation. A failed control device can create symptoms that resemble a refrigeration or airflow problem.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigerants\u003c\/strong\u003e account for 10%. Review refrigerant properties, pressure-temperature relationships, refrigerant states, charging principles, recovery concepts, safety, and system performance.\u003c\/p\u003e\n\n\u003cp\u003eTechnical refrigerant knowledge connects directly with compressor, evaporator, and condenser operation. Candidates should understand how changes in pressure, temperature, superheat, subcooling, and charge affect system performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOperating Procedures, including Safety\u003c\/strong\u003e represent 9%. Review startup and shutdown procedures, evacuation, charging, leak testing, recovery, pressure hazards, electrical safety, safe tool use, and appropriate personal protective equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaintenance and Repairs\u003c\/strong\u003e account for 8%. Candidates should understand preventive maintenance, troubleshooting methods, airflow issues, refrigerant problems, electrical faults, component failures, coil condition, filter condition, and general HVACR service procedures.\u003c\/p\u003e\n\n\u003cp\u003eA practical troubleshooting approach can make technical questions easier. Begin with the reported symptom, identify possible causes, determine what measurements or observations would confirm those causes, and then select the appropriate corrective action.\u003c\/p\u003e\n\n\u003cp\u003eFor example, inadequate cooling may result from restricted airflow, improper refrigerant charge, dirty coils, compressor problems, failed controls, duct leakage, or a metering-device issue. Candidates should learn how system readings and symptoms help distinguish among those possibilities.\u003c\/p\u003e\n\n\u003cp\u003eBecause the examination is limited to three hours, candidates should practice working through questions under timed conditions. Try to answer straightforward technical questions efficiently and reserve longer reference searches for code-specific or calculation-based problems.\u003c\/p\u003e\n\n\u003cp\u003eWhen reviewing missed practice questions, determine whether the error involved theory, an incorrect code section, misunderstanding a component, improper troubleshooting logic, a refrigerant concept, or an electrical-control issue. Studying the reason behind an incorrect answer is generally more valuable than simply memorizing the correct choice.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow 1 Exam Prep Helps You Reach Your Goal\u003c\/h2\u003e\n\n\u003cp\u003e1 Exam Prep supports Washington DC Master Refrigeration \u0026amp; Air Conditioning Mechanical Limited candidates through organized study guidance, HVACR-focused review, practice-oriented preparation, mechanical-code navigation, calculation practice, and troubleshooting-focused study.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e provides the mechanical-code foundation for exam preparation. Working directly with this code helps candidates become familiar with requirements involving refrigeration systems, piping, ventilation, ducts, appliances, combustion air, condensate disposal, and mechanical equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e provides technical study material covering refrigeration theory, system components, electrical fundamentals, controls, refrigerants, heat pumps, air-conditioning systems, maintenance, troubleshooting, and service procedures.\u003c\/p\u003e\n\n\u003cp\u003eA structured study approach can prioritize preparation according to the official exam weighting. Refrigerant and Condensate Piping deserves significant attention at 18%, followed by Theory and General Requirements at 16%, equipment at 15%, and conditioned-air and duct subjects at 15%.\u003c\/p\u003e\n\n\u003cp\u003eRefrigerants, Electrical Fundamentals and Controls, Operating Procedures and Safety, and Maintenance and Repairs should also remain part of a complete preparation schedule.\u003c\/p\u003e\n\n\u003cp\u003e1 Exam Prep focuses on helping candidates strengthen HVACR knowledge, improve reference-navigation skills, develop troubleshooting ability, and build an organized study routine without guaranteeing a particular examination score or licensing outcome.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow many questions are on the Washington DC Master Refrigeration and Air Conditioning Mechanic Limited exam?\u003c\/h2\u003e\n\n\u003cp\u003eThe current examination contains \u003cstrong\u003e70 multiple-choice questions\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow much time is allowed for the exam?\u003c\/h2\u003e\n\n\u003cp\u003eCandidates receive a \u003cstrong\u003e3-hour time limit\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs the Washington DC Master Refrigeration and Air Conditioning Mechanical Limited exam open book?\u003c\/h2\u003e\n\n\u003cp\u003eYes. The current examination is an \u003cstrong\u003eopen book test\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhich mechanical code is used for the examination?\u003c\/h2\u003e\n\n\u003cp\u003eThe current PSI examination bulletin identifies the \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e as an approved reference.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs Modern Refrigeration and Air Conditioning included in the package?\u003c\/h2\u003e\n\n\u003cp\u003eYes. This package includes \u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e as a comprehensive HVACR study resource.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhich edition of Modern Refrigeration and Air Conditioning is approved for the exam room?\u003c\/h2\u003e\n\n\u003cp\u003eThe current PSI bulletin specifically identifies \u003cstrong\u003eModern Refrigeration and Air Conditioning, 2004\u003c\/strong\u003e as an approved exam-room reference for examination 322. The 22nd Edition included in this package is intended for study and technical review.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat is the largest examination category?\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eRefrigerant and Condensate Piping\u003c\/strong\u003e is the largest category at \u003cstrong\u003e18%\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat is considered limited refrigeration and air-conditioning work in Washington DC?\u003c\/h2\u003e\n\n\u003cp\u003eDistrict licensing information identifies limited work as refrigeration and air-conditioning work performed on equipment at or below \u003cstrong\u003e25 compressor horsepower\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eHow much experience is required for a Master Mechanic Limited license?\u003c\/h2\u003e\n\n\u003cp\u003eDistrict law requires at least \u003cstrong\u003efive consecutive years of qualifying refrigeration and air-conditioning experience immediately before application\u003c\/strong\u003e, verified in writing by a master mechanic.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs CFC certification required?\u003c\/h2\u003e\n\n\u003cp\u003eYes. District law requires proof of \u003cstrong\u003echlorofluorocarbon certification\u003c\/strong\u003e for a Master Refrigeration and Air Conditioning Mechanic Limited applicant.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the examination cover electrical controls?\u003c\/h2\u003e\n\n\u003cp\u003eYes. \u003cstrong\u003eElectrical Fundamentals and Controls\u003c\/strong\u003e represent \u003cstrong\u003e9%\u003c\/strong\u003e of the current examination outline.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eDoes the exam cover air ducts and ventilation?\u003c\/h2\u003e\n\n\u003cp\u003eYes. Conditioned air, supply and return air, makeup air, combustion air, ducts, dampers, and insulation represent \u003cstrong\u003e15%\u003c\/strong\u003e of the examination.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWho regulates Washington DC refrigeration and air-conditioning mechanics?\u003c\/h2\u003e\n\n\u003cp\u003eLicensing is regulated through the \u003cstrong\u003eDistrict of Columbia Board of Industrial Trades\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWho administers the examination?\u003c\/h2\u003e\n\n\u003cp\u003eThe Washington DC Master Refrigeration and Air Conditioning Mechanic Limited examination is administered through \u003cstrong\u003ePSI\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhen do Washington DC Refrigeration and Air Conditioning licenses expire?\u003c\/h2\u003e\n\n\u003cp\u003eThese licenses currently expire on \u003cstrong\u003eSeptember 30 of even-numbered years\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eIs the Master Mechanic Limited license the same as a contractor license?\u003c\/h2\u003e\n\n\u003cp\u003eNo. The individual Master Refrigeration and Air Conditioning Mechanic Limited credential and the Refrigeration and Air Conditioning Contractor Limited credential are separate. A business performing contracting work must satisfy the District's applicable contractor requirements.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhat should I focus on when studying?\u003c\/h2\u003e\n\n\u003cp\u003eFocus on refrigerant and condensate piping, refrigeration theory, major HVACR equipment, duct systems, airflow, electrical fundamentals, controls, refrigerants, operating procedures, safety, maintenance, troubleshooting, and efficient navigation of the 2012 International Mechanical Code.\u003c\/p\u003e\n\n\u003ch2 style=\"color: #d32f2f;\"\u003eWhy choose the Washington DC Master Refrigeration \u0026amp; Air Conditioning Mechanical Limited Book Package?\u003c\/h2\u003e\n\n\u003cp\u003eThis package combines the \u003cstrong\u003e2012 International Mechanical Code\u003c\/strong\u003e with \u003cstrong\u003eModern Refrigeration and Air Conditioning, 22nd Edition\u003c\/strong\u003e to support mechanical-code study and comprehensive HVACR preparation. Together, the books provide a strong foundation for piping, refrigeration theory, equipment, air distribution, controls, refrigerants, safety, maintenance, troubleshooting, and open-book exam preparation.\u003c\/p\u003e\n\n","brand":"1 Exam Prep","offers":[{"title":"Default Title","offer_id":46530798321721,"sku":null,"price":445.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1789\/0861\/files\/DC-MASTERREFRIGERATION-BOOKS.jpg?v=1789660165","url":"https:\/\/1examprep.com\/products\/washington-dc-master-refrigeration-air-conditioning-mechanical-limited-book-package","provider":"1 Exam Prep","version":"1.0","type":"link"}