HVACR Questions PDF
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These questions cover various aspects of HVACR, including topics like heating systems, ventilation, refrigeration cycles, and safety procedures. They represent multiple choice questions on technical concepts and demonstrate a practical examination approach.
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1. In a hydronic heatingsystem, the heat exchange medium is_____. A. ultraviolet light B. water C. ammonia D. air 2. In anelectric-resistance heatingsystem, electricity is used to heat_______. A. coils of heavy wire B. water C. natural gas D. a boiler 3. Ventilation is the process of_____. A....
1. In a hydronic heatingsystem, the heat exchange medium is_____. A. ultraviolet light B. water C. ammonia D. air 2. In anelectric-resistance heatingsystem, electricity is used to heat_______. A. coils of heavy wire B. water C. natural gas D. a boiler 3. Ventilation is the process of_____. A. adding humidity to the air B. using filters to remove toxic and noxious particles C. removing humidity from the air D. introducing fresh air into a building 4. The device that lowers the temperature of the refrigerant before it enters the evaporator is the_____. A. condenser B. expansion device C. compressor D. liquidator 5. The two heat exchangers in the mechanical refrigeration cycle are the_____. A. compressor and condenser B. evaporator and condenser C. compressor and metering device D. compressor and evaporator 6. Compared to the outdoorair, the refrigerant entering the condenser is_____. A. fresher B. the same temperature C. warmer D. cooler 7. Which of the following produces carbonmonoxide? A. Solar collectors B. Furnaces burning natural gas or propane C. Hot water baseboards D. Electric heat coils 8. A person must have EPA certification to_____. A. work on an HVACR system B. release CFC or HCFC refrigerant to the atmosphere. C. buy parts for an HVACR system D. buy or use refrigerant 9. Recovery is a process in which a refrigerant is_____. A. removed and stored B. converted to a different refrigerant C. remanufactured D. removed and cleaned of moisture and impurities 10. An important difference between codes and standards isthat_______. A. inspectors can only enforce codes during regular work hours B. codes are enforced by law C. builders charge more for codes then standards D. standards are rarely followed 11. Before starting work on abuilding, a contractor must apply for a______. A. permit B. permanent electrical connection C. certificate of occupancy D. tax waiver 12. A person who services chillers most likely works in whichsector? A. Commercial/industrial B. Government C. Residential/light commercial D. Manufacturing 13. Acompetency-based training program is one that requires the trainee to_____. A. have apart-time job in construction B. pass a written test C. demonstrate the ability to safely perform specified tasks D. spend 8 hours a day in the classroom 14. A student entering a Youth Apprenticeship program in 11th grade could complete how much of anNCCER-based program before graduating highschool? A. Two years B. One year C. Eighteen months D. Six months
