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Refrigeration machine operator

Refrigeration machine operator

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3B2 chapter 10 (Questions on ABSA) Exam Questions and Answers

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    3B2 chapter 10 (Questions on ABSA) Exam Questions and Answers

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  • what are the main natural types of cooling - Answer--Cooling with ice -Evaporitive cooling -Free cooling -Freezing mixtures The first principle of refrigeration is based on - Answer-laws of thermodynamics The second law of thermodynamics states that heat cannot pass from a _______ body to a _______ body without ? - Answer--cold -hot -external source of energy what are the characteristics of a conventional refrigeration cycle - Answer--Transfer of heat from a colder substance t...
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A/C Service and Refrigeration Exam Questions with Correct Answers

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    A/C Service and Refrigeration Exam Questions with Correct Answers

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  • flash-gas - Answer-The presence of ___________ in the liquid lines reduces the efficiency of the refrigeration cycle, leads several expansion systems to work improperly and, increases superheating in vapor. A1 - Answer-According to ASHRAE refrigerant safety classification standard which designation would be the safest ? Attach DOT classification tags - Answer-When transporting cylinders containing used refrigerant, DOT requires that you ? CFC - Answer-What compound has the highest ozone...
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Refrigeration Test Exam Questions with Complete Solutions

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    Refrigeration Test Exam Questions with Complete Solutions

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  • Automatic expansion valves work with - Answer-Evaporator pressure closes valve spring pressure opens valve A faulty check in a pump will cause the most damage on - Answer-Startup If the T E V's sensing bulb falls off the suction line you will - Answer-Flood the evaporator A clogged condenser pump strainer can cause a loss of pressure causing - Answer-High condenser head pressure A solenoid valve is part of the pump down cycle - Answer-Thermostat solenoid valve and then the low press...
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Refrigeration RETA Exam Questions with Correct Answers

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    Refrigeration RETA Exam Questions with Correct Answers

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  • Safety Study Questions What is the purpose of an SOP? A. To break down the amount of work to be done in a given time. B. To read after the job is done. C. To provide guidance and specific steps necessary to safely operate the system. D. To provide a standard way to perform the job faster. - Answer-C. To provide guidance and specific steps necessary to safely operate the system. Where can a list of the proper PPE needed to safely perform a job task be found? A. SOPs and MPs B. Safety ...
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Ammonia Refrigeration Final Exam Questions with Verified Answers

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    Ammonia Refrigeration Final Exam Questions with Verified Answers

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  • Convection is the transfer of ____ - Answer-heat through a material or substance Radiation is the ____ - Answer-projection of heat like the heat radiated by the sun or by an open flame T or F: Heat is always on the move, traveling only in one direction and always from hot to cold - Answer-false What are two methods of heat transfer? - Answer-conduction and convection What are two basic forms of refrigeration systems? - Answer-direct expansion and gravity flooded T or F: Conduction...
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Power Engineering 3B2 Chapter 11 Exam Questions with Correct Answers

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    Power Engineering 3B2 Chapter 11 Exam Questions with Correct Answers

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  • When the pressure difference across a capillary tube is increased: a. The flow of refrigerant increases. b. The flow of refrigerant decreases. c. The pressure of the refrigerant increases. d. The pressure of the refrigerant decreases. e. There is no change in the flow rate. - Answer-a The king valve on an ammonia vapor compression system serves as a: a. Refrigerant control valve. b. Valve to connect the ammonia drum when charging the system. c. Brine control valve. d. Master isolati...
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Commercial Refrigeration Exam II Questions with Latest Update

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    Commercial Refrigeration Exam II Questions with Latest Update

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  • 5% - Answer-If converting from mineral oil to POE oil, what is considered to be the industry standard for residual mineral oil content? Refractometer Oil conversion test kit - Answer-When converting to POE from mineral oil, what can be used to determine residual mineral oil content? Global warming potential (GWP) - Answer-Some refrigerants are now being phased out due to their HCFC - Answer-Which currently used refrigerant category is quickly disappearing due to its ozone depletion p...
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Unit 9 - Chapter 4 - Refrigeration Operation and Maintenance Exam Questions with Correct Answers

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    Unit 9 - Chapter 4 - Refrigeration Operation and Maintenance Exam Questions with Correct Answers

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  • Pressure gauges - Answer-Indicate the conditions inside a refrigeration system. Show evaporator and condenser pressures, they indicate saturation temps. Does CSA B52 require permanently installed pressure gauges on any refrigeration system? - Answer-No, it does not require them. But ammonia systems usually have permanently installed gauges. One to the high side and one to the low side. What should pressure gauges in a refrigeration system be equipped with? - Answer-Pulsation dampeners to p...
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Unit 9 - Chapter 3 - Refrigeration System Control and Operation Exam Questions and Answers

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    Unit 9 - Chapter 3 - Refrigeration System Control and Operation Exam Questions and Answers

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  • Human Machine Interface (HMI) - Answer-Designed to allow operators to receive operational data and alarms on a screen or a series of screens allowing to make changes to set points or operational expectations. Refrigeration plan capacity must always equal the __________. - Answer-Cooling Load. Control systems respond to: - Answer-Temp, Pressure and Humidity. Temperature-Actuated Control (Thermostat) - Answer-Electric controls can be used for starting and stopping a compressor. A thermost...
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NYC Refrigeration Exam Questions Exam Questions and Answers

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    NYC Refrigeration Exam Questions Exam Questions and Answers

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  • 58-Cooling tower water requires the addition of chemical additives in order to. - Answer-Reduce the formation of scale and algae 59-In the picture below describe equipment function - Answer-Remove non condensables from condenser 60-The Viscosity of lubrication oil is described by a number. A low viscosity number describes an oil that - Answer-Flows easily 61- The most likely reason for a refrigeration engineer to use a psychomotor is to measure - Answer-Relative humidity level of the at...
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