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7 Cards in this Set
- Front
- Back
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The primary difference between direct and indirect refrigeration systems is the: 1) Location of the medium being cooled 2) Type of heat transfer medium 3) Evaporator pressure 4) Compressor location 5) Type of refrigerant |
Location of the medium being cooled |
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The brine pump: 1) Circulates the refrigerant through the evaporator 2) Circulates the brine through the cooling circuits 3) Maintains the brine level in the cooling circuit 4) Pumps brine through the condenser cooling circuits 5) Is used to remove heat from the condenser |
Circulates the brine through the cooling circuits |
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Raising the condensing point (saturation temperature) of the refrigerant vapour above the temperature of the cooling medium is the function of the: 1) Absorber 2) Evaporator 3) Refrigerant 4) Condenser 5) Compressor |
Compressor |
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The heat given up by the brine in the evaporator must equal the heat: 1) Gained by the condenser 2) Picked up by the receiver 3) Produced by the compressor 4) Picked up by the refrigerant 5) Given up by the condenser |
Picked up by the refrigerant |
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The type of brine used for skating and hockey rink refrigeration systems is usually: 1) Calcium nitrate 2) Sodium chloride 3) Calcium chloride 4) Calcium carbide 5) Calcium sulphate |
Calcium chloride |
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Which of the following statements about the economisers is false? 1) The upper float chamber is connected to the bottom of the condenser 2) It is composed of two chambers 3) Liquid refrigerant levels in each chamber are controlled by float operated valves 4) It controls the flow of liquid refrigerant from the low pressure evaporator to the high pressure condenser 5) The economiser float chamber is connected via the motor to the second stage inlet of the compressor |
It controls the flow of liquid refrigerant from the low pressure evaporator to the high pressure condenser |
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Which of the following statements about a system that circulates warm brine back to a chiller tank is true? 1) The system is a direct refrigeration system 2) The evaporator cools the brine 3) The condenser in the system is located in direct contact with the material being refrigerated 4) The evaporator in the system is located in direct contact with the material being refrigerated 5)The brine or water is the refrigerant |
The evaporator cools the brine |
