Hvac refrigeration - Study guides, Class notes & Summaries

Boma hvac Exam Questions With Verified Solutions What happens when room temperature soda is poured into a glass of ice ? - answerThe ice melts because it is absorbing heat from the soda . The compressor in a refrigeration system - answerpumps the refrigerant throughout the system To control ice build - up on a heat pump outdoor coil in the heating cycle a ______ is used . - answerpressure differential switch The total pressure of a confined mixture of gases is the sum of the pressures of...

HVAC S.T.A.R EXAM QUESTIONS AND ANSWERS 100% PASS The evaporator in a refrigeration system: - Correct Answer ️️ -Is the component where refrigerant boils and absorbs heat. The purpose of the compressor is to change ___________. - Correct Answer ️️ -Low- pressure, low-temperature vapor to a high-pressure, high temperature vapor A common refrigerant leak detection device is the: - Correct Answer ️️ -Halide torch. Copper-plating of compressor parts is: - Correct Answer ️️ -Ca...

Residential HVAC Installation Exam Questions with Correct Answers Clearance tolerances are such that the ordinary clean refrigerant oil can be used satisfactorily in a vacuum pump. - Answer-false The maximum recommended pressure for leak testing is 150 psig on the low-pressure side of the system. - Answer-true Noncondensable gases ____. - Answer-are undesirable in a refrigeration system To pull a vacuum means to ____. - Answer-lower the pressure in a refrigeration system below atmosp...

HVAC Journeyman License Study Guide with Complete SolutionsHVAC Journeyman License Study Guide with Complete SolutionsHVAC Journeyman License Study Guide with Complete SolutionsHVAC Journeyman License Study Guide with Complete Solutions Exception - ANSWER-Where equipment and appliance replacements or repairs must be preformed in an emergency situation, the permit application shall be submitted within the next working business day of the department of mechanical inspection. 106.2 Permits not ...

HVAC Unit 29 Troubleshooting and Typical Operating Conditions for Commercial Refrigeration Review Questions and AnswersHVAC Unit 29 Troubleshooting and Typical Operating Conditions for Commercial Refrigeration Review Questions and AnswersHVAC Unit 29 Troubleshooting and Typical Operating Conditions for Commercial Refrigeration Review Questions and Answers What is the first thing a technician should know before beginning troubleshooting? - ANSWER - Knowing the correct operating pressures for a t...

NATE CORE STUDY GUIDE(correct answers)to passWhich of the following is not the product of incomplete combustion: Oxides of nitrogen An oil trap is required at the base of the discharge line of the vertical riser is _____ or above 8 feet A diode allows current to flow in one direction: True 1 Watt = _____ Btu 3.41 Current in a closed circuit is limited by which of the following: resistance An oil separator is located in the _____: Discharge line ___...

HVAC TEST QUESTIONS Two locations where a cold air return should be installed - open area of a wall and low to the ground Which of the following is the law of thermodynamics? - heat moves toward a place with lower intensity Sensible heat describes - how hot something feels Latent heat is measured in - british thermal units What is the amount of heat energy required to evaporate 1 pound of water? - 970 btu In an air conditioning system and refrigeration system, what occurs in ...

November 14, 1994 - What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? Memorize it, ya'll. - 1987- Montreal Protocol July 1 1992- Violation to vent CFCs or HCFCs Nov 15 1993- Recovery/Recycling equipment must be certified and labeled by EPA AND Before this date recovery equipment needed to be capable of removing 80% of the refrigerant, w or wo compressor, or 4 in Hg After this date recovery equipment needs to be capable of ...

HVAC PRETEST BOMA EXAM QUESTIONS AND ANSWERS Two basic categories of chillers are the ___. a. Compression cycle and absorption b. purge and absorption c. absorption and lithium bromide d. purge and lithium bromide - ANS a. Compression cycle and absorption The five requirements for comfort are proper temperature, humidity, filtration, _____, and ventilation. a. circulation b. velocity c. . d. none of the above - ANS a. circulation The primary function of an expansion dev...

HVAC Final Exam Complete Questions & Answers(GRADED A+) Air Conditioning - ANSWER A process that involves heating, cooling, humidifying, dehumidifying, and cleaning air. Boiler - ANSWER Consists of a vessel or tank like container where heat is produced from the combustion fuels such as natural gas, fuel oil, coal, or electric resistance heating used to produce hot water or steam. Condenser - ANSWER Refrigeration cycle component rejects heat into the atmosphere Evaporator - ANSWER Ref...