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What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．
A.Exposure to carbon dioxide for no more than 1 minute
B.Exposure to carbon dioxide for more than 10 minutes
C.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutes
D.None of the above
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更多 “ What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．A.Exposure to carbon dioxide for no more than 1 minuteB.Exposure to carbon dioxide for more than 10 minutesC.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutesD.None of the above ” 相关考题
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If the meter needle of the oxygen indicator cannot be set to zero，what should be done ________．A.Replace the batteriesB.Check the sampling tube for blockageC.Adjust the final reading by the amount the needle is displaced from zeroD.Replace the platinum filament
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You are testing a tank that contained gasoline by using a combustible gas indicator．Under testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．A.Less than the flammable rangeB.Within the flammable rangeC.Over the flammable rangeD.The explosimeter is defective and giving a false reading
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An oxygen indicator can be used to determine if there is ______.A.sufficient oxygen in a compartment to support lifeB.combustible gases presentC.hyfrogen gases presentD.All of the above
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Deficient oxygen content inside a chain locker can be detected with ______.A.litmus paperB.a combustible gas indicatorC.an oxygen breathing apparatusD.an oxygen indicator
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单选题The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.A
seawater contaminationB
frequent surface blowsC
dissolved oxygen deaerationD
frequent bottom blows
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单选题A combustible gas indicator is used to determine （）.A
if there is sufficient oxygen to support lifeB
the toxicity of flammable gases or vaporsC
the amount ofCO2 present in flue gasD
the presence of flammable gases or vapors in the air
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单选题Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to（）.A
flashing pointB
combustion pointC
auto-ignition pointD
lower explosive limit
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单选题If the meter needle of the oxygen indicator cannot be set to zero，what should be done? （）A
Replace the batteriesB
Check the sampling tube for blockageC
Adjust the final reading by the amount the needle is displaced from zeroD
Replace the platinum filament
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单选题Should a person be overcome due to lack of oxygen and high concentration of refrigerant, treat with（）.A
fresh waterB
fresh airC
salt waterD
artificial respiration
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单选题What can cause a lack of oxygen in a chain locker（）．A
AbsorptionB
OsmosisC
EvaporationD
Oxidation
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单选题What is required in addition to the heat，fuel，and oxygen of the fire triangle to have a fire?（）A
ElectricityB
Chain reactionC
PressureD
Smoke
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单选题Deficient oxygen content inside a chain locker can be detected with（）.A
litmus paperB
a combustible gas indicatorC
an oxygen breathing apparatusD
an oxygen indicator
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单选题Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.A
Orsat apparatusB
flame safety lampC
Halide torchD
combustible gas indicator
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单选题A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.A
purifiesB
combinationsC
concentrationsD
filters
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单选题An oxygen indicator will detect （）.A
the amount of oxygen in a spaceB
the presence of harmful amounts of carbon monoxideC
concentrations of explosive gasD
All of the above
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单选题After each reading of an oxygen indicator，the instrument should be purged with（）.A
CO2B
fresh airC
the tested compartment's airD
water
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单选题While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.A
enter the tank safelyB
suspect the accuracy of the readingC
ventilate the tankD
test for nitrogen
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单选题Deficient oxygen content inside a chain locker can be detected with（）.A
litmus paperB
combustible gas indicatorC
oxygen breathing apparatusD
oxygen indicator
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