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If liquid refrigerant accidentally comes in contact with the eyes, _____ immediately.
A.rub the eyes
B.irritate the eyes
C.wash the eyes with a heavy boric acid solution
D.obtain medical help
参考答案
更多 “ If liquid refrigerant accidentally comes in contact with the eyes, _____ immediately.A.rub the eyesB.irritate the eyesC.wash the eyes with a heavy boric acid solutionD.obtain medical help ” 相关考题
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Faulty expansion valveC
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a shortage of refrigerant in the systemB
air in the systemC
an accumulation of liquid refrigerant in the crankcaseD
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单选题An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.A
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prohibit flashing in the liquid lineC
reduce refrigerant volume in the systemD
reduce compressor discharge line loading
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单选题If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.A
too much refrigerant in the systemB
oil entrained in the refrigerantC
less than a full charge of refrigerant in the systemD
ice crystals forming in the refrigerant
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单选题A pressure drop through the refrigerant liquid line may cause （）.A
solenoid valve to seizeB
compressor to huntC
formation of flash gas in the liquid lineD
expansion valve to freeze open
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evaporatorB
compressorC
expansion valveD
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单选题The temperature of the refrigerant in the evaporator coil depends mostly upon the （）.A
refrigerant pressure in the evaporatorB
cooling water temperature to the condenserC
heat load in the refrigerator compartmentD
solenoid valve in the liquid line
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insufficient cooling water flow to the condenserB
a low refrigerant charge in the systemC
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high evaporator superheat
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单选题Moisture in the refrigerant may （）.A
freeze on the expansion valve seat and reduce the flow of liquid refrigerantB
emulsify the oil in the condenserC
freeze in the king valveD
clog the oil trap
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suction service valve as a vaporB
suction service valve as a liquidC
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vaporizes in the condenserB
reaches the compressor through the suction lineC
flashes in the liquid lineD
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The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivityC
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treat victim for shockC
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give victim stimulant
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increase the refrigerating effect, by decreasing the amount of flash gasB
allow the refrigerant to enter the throttling device in a saturated conditionC
increase the refrigerating effect by increasing the amount of flash gasD
minimize the temperature drop of the liquid as it passes through the solenoid valve to the outlet side
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单选题Sub-cooling is a method of reducing the temperature of the liquid refrigerant below its （）.A
freezing pointB
floc pointC
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lubricantB
coolantC
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单选题The purpose of the low pressure cut-out switch is to （）.A
maintain liquid refrigerant at the suction of the compressorB
maintain a preset suction pressure to the compressorC
start and stop the compressor at preset operating pressuresD
operate at minimum efficiency
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单选题If liquid refrigerant accidentally comes in contact with the eyes, （） immediately.A
rub the eyesB
irritate the eyesC
wash the eyes with a heavy boric acid solutionD
obtain medical help
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单选题A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.A
condition of the expansion valveB
moisture in the systemC
condition of the compressor suction valvesD
condenser temperature
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单选题A hygroscopic cargo is define as a cargo（）.A
capable of absorbing moisture in the form of a gasB
capable of giving off moisture in the form of a liquidC
that is shipped in a liquid ststeD
that will ignite in contact with water
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单选题The presence of bubbles in a refrigeration system liquid line may （）.A
promote refrigerant dehydrationB
be absorbed in the receiverC
cause low condensing pressureD
carry moisture and lead to corrosion
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