4698908
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace más de 10 años
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Pregunta 1
Pregunta
In a two stage, duplex compressor refrigeration system, the condenser for the first stage is the ______ for the second stage.
Respuesta
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Eliminator
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Purger
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Receiver
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Evaporator
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Liquid cooler
Pregunta 2
Pregunta
The major components of a high-pressure ammonia system are:
Respuesta
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Compressor, condenser, oil purifier, high-pressure cutout, evaporator
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Compressor, condenser, expansion valve, high-pressure cutout, evaporator
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Compressor, condenser, expansion valve, oil purifier, evaporator
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Compressor, condenser, expansion valve, high-pressure cutout, expansion valve
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Compressor, condenser, expansion valve, liquid receiver, evaporator
Pregunta 3
Pregunta
A/An _____ is usually provided between the low-pressure discharge and high-pressure suction of a multi-stage refrigeration system.
Respuesta
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Condenser
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Receiver
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Purger
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Evaporator
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Intercooler
Pregunta 4
Pregunta
The standard refrigeration cycle is used to compare refrigerants and machines operating under comparable conditions. These standard conditions are:
Respuesta
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1030 kPa and atmospheric pressure
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30deg c condensing and -15 deg c evaporating
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30 kPa and atmospheric pressure
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-30deg C condensing and 15 deg c evaporating
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30 kPa and atmospheric temperature
Pregunta 5
Pregunta
A reciprocating refrigerant compressor may have both a/an ______ and a/an ______.
Respuesta
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Magnetic plug, integral air reciever
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Reverse osmosis membrane, emergency connecting rod
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Oil foam breaker, magnetic plug
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Oil foam plug, magnetic foam breaker
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Teflon drive coupling, reverse RPM indicator
Pregunta 6
Pregunta
There are _____ basic elements common to most compression refrigeration systems.
Respuesta
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2
-
3
-
4
-
5
-
6
Pregunta 7
Pregunta
Most modern refrigeration systems make use of the principle of absorbing heat by:
Respuesta
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Condensing refrigerant at low pressure
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High evaporating pressures
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The evaporation of a liquid, and then discarding the heat to the atmosphere
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Evaporation of brine
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High condensing temperature and pressure
Pregunta 8
Pregunta
The difference in enthalpy of ammonia as a fluid at saturation conditions at 1165.8 kPa abs and 236.2 kPa abs is found in the:
Respuesta
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hf column and is 208.9kJ/kg
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hf and hg columns and is 1311.6 kJ/kg
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hf column and is 114.905 kJ/kg
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hf column and is 0.508788 kJ/kg
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hg column and is 658.519 kJ/kg
Pregunta 9
Pregunta
The liquid receiver in a refrigeration system is a/an:
Respuesta
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Oil storage unit
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Storage vessel for liquid brine
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Contaminated liquid storage tank
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Surge vessel for refrigerant
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Pressure vessel
Pregunta 10
Pregunta
In a two-stage refrigeration system, the 1st stage compressor is also known as a _____ compressor.
Respuesta
-
Booster
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Standby
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Low volume
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Extraction
-
Refrigerant
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