4699066
Beschreibung
Quiz von TRAVIS CANNING, aktualisiert more than 1 year ago
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Erstellt von TRAVIS CANNING
vor etwa 8 Jahre
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Frage 1
Frage
Suction pressure too low might be due to:
Antworten
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System load too high
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Not enough condenser cooling water
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Receiver level too high
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Receiver level too low
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Faulty or closed expansion valve
Frage 2
Frage
When changing ammonia systems, frost on the drum bottom indicates:
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Too much refrigerant
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The ambient temperature is too high
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Refrigerant drum is empty or very nearly empty
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Refrigerant drum is still full
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Pressure is too high
Frage 3
Frage
A low-pressure control in a refrigerating system can be used for:
Antworten
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Condenser pressure control
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Starting and stopping the compressor
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Purging non-condensable gases
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Keeping the receiver pressure from getting too high
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Evaporator pressure control
Frage 4
Frage
In an indirect ammonia system using brine and water-cooled condenser, the discharge pressure is controlled by:
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The load on the brine
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Regulating the expansion valve
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Regulating the cooling water to the condenser
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Using a pressure release valve
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The amount of ammonia refrigerant used
Frage 5
Frage
Where public occupancy is a concern when using Safety Group 2 refrigerants the safest systems are:
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Direct refrigeration
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Indirect systems
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Any available system
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Automatic refrigeration
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The C/S/A approved refrigeration systems
Frage 6
Frage
The most efficient method of condenser cooling is
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Air cooled
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Water cooled
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Latent heat cooled
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Diffusion cooled
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Cooled by another refrigeration unit
Frage 7
Frage
Before changing a new refrigeration installation:
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It should be filled with water first
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The entire refrigerant containing system must be thoroughly tested for performance
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It should be filled with refrigerant and tested for performance
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The entire refrigerant containing system must be completely filled with water and hydrostatically tested
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It should be filled with hydrogen and tested
Frage 8
Frage
In a indirect ammonia vapour compression system using brine, the suction pressure is controlled by:
Antworten
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The load on the brine
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The flow of the cooling water to the suction side of the compressor
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Throttling the metering valve
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An equalization valve
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The flow of the condensing water to the condenser
Frage 9
Frage
Refrigeration application uses could include:
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Heating methods in industry
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Gas distillation process
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Refrigerant oil purification
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Air conditioning humidifying
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Air conditioning or gas dehydration
Frage 10
Frage
The capillary tube has a
Antworten
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Very small diameter
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Medium sized diameter
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Large diameter
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Convergent-divergent cross-section
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Concaved cross sectional area
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