Refrigeration system - Study guides, Class notes & Summaries

Commercial Refrigeration Ch.7 (Refrigeration System Troubleshooting) with Complete SolutionsCommercial Refrigeration Ch.7 (Refrigeration System Troubleshooting) with Complete SolutionsCommercial Refrigeration Ch.7 (Refrigeration System Troubleshooting) with Complete SolutionsWhat is the first thing a technician needs to know about the system he is trying to troubleshoot? - ANSWER - How the system is supposed to operate. What are eight pieces of information needed to diagnose a system problem?...

RI Journeyman's Refrigeration License Exam Questions With Verified Solutions. The temperature scale that freezes water at 32 deg. and boils water at 212 deg. is known as the ___________ scale - answerFahrenheit The temperature scale that freezes water at 0 deg. and boils water at 100 deg. is known as the __________ scale. - answerCentigrade The definition of specific heat is _______________________ - answerthe amount of heat required to raise 1 lb of a substance 1 deg. F. The definition...

On an R-22 system, line diameters and lengths are typically specified for a vapor pressure drop that does not exceed what? CORRECT ANSWER 6-7PSI or 6F What is the primary purpose of using flux when soldering copper or brass parts? CORRECT ANSWER Prevent Oxidation The water that results from a defrost cycle of an air to air heat pump(runoff) must? CORRECT ANSWER Drain off and away from the outdoor coil. Why must the runoff be drained off and away from the outdoor coil? CORRECT ANSWER Exc...

1. Before charging a new system with refrigerant, what should be done Answer:?: Pres- surize with nitrogen (classified as an inert gas) and leak 2. Which refrigerant can be used for leak detection as a trace gas and pres- surized with nitrogen Answer:?: R-22 3. What tools can you use to find general area of leaks and pinpoint leaks? a. Soap bubbles. b. Look for oil residue c. Electronic or ultrasonic leak detector will provide the general area of the leak d. Refrigerant dye Answer...

Commercial Refrigeration Ch 11 (Walk-in System Sizing and Installation) with Complete SolutionsCommercial Refrigeration Ch 11 (Walk-in System Sizing and Installation) with Complete SolutionsCommercial Refrigeration Ch 11 (Walk-in System Sizing and Installation) with Complete SolutionsCommercial Refrigeration Ch 11 (Walk-in System Sizing and Installation) with Complete Solutions Four inches of urethane insulation is equivalent to how many inches fiberglass insulation? - ANSWER - 10 inches Why...

On low pressure chillers, moisture typically enters the refrigerant system through air leaks from areas with gaskets or fittings The maximum test pressure for leak testing a low pressure centrifugal is: 10 psig Leak test and repair the chiller to reduce refrigerant loss from a pruge unit on CFC-11 chiller ... A hydrostatic tube test kit is used to: determine if a tube leaks Commercial and industrial process refrigeration systems must be repaired when the leak rate...

FDNY Z51 RMO Questions and Answers 100%Verified Graded A+ already passed!! the efficiency of the refrigerant cycle is affected by the operation of the condenser. Of the following, a more efficient centrifugal compressor operation results from - correct answer lowering the condenser pressure In most semi hermetic compressors, the suction vapor is used for - correct answer cools the motor The amount of refrigerant that flows through the orifices of an economizer is determined by the - corre...

Commercial Heating and Cooling-(Unit 37 Management of Refrigerants and Refrigeration systems) with Complete SolutionsCommercial Heating and Cooling-(Unit 37 Management of Refrigerants and Refrigeration systems) with Complete SolutionsCommercial Heating and Cooling-(Unit 37 Management of Refrigerants and Refrigeration systems) with Complete Solutions high-pressure appliance - ANSWER - A refrigeration or air conditioning system that has a refrigerant charge over 5 lb, has a boiling point between ...

Acceptable Risk The average rate of loss that is considered tolerable for a given activity. Accident An unplanned event or sequence of events that results in an undesirable consequence. An occurrence where property damage, material loss, detrimental environmental impact or human injury occurs. Accidental Release An unanticipated emission of a regulated substance or other extremely hazardous substance into the ambient air. Action Items A column in the What-If/Checklist Wo...

EPA 608 Type 2 Test Questions With Answers Technicians maintaining, servicing, repairing or disposing of high pressure or very high-pressure appliances, except small appliances and MVAC, must be certified either as a Universal Technician or a ______ ___. - CORRECT ANSWER Type 2 After the installation of any type of system, the unit should be pressurized with _____ and _____ checked. - CORRECT ANSWER nitrogen leak Nitrogen is an ______ gas. - CORRECT ANSWER...