题目
A. 碳氢化合物
B. 碳氧化合物
C. 一氧化碳
D. 二氧化碳
第2题
A.Plants
B.Fingers
C.Completely
D.Good
第4题
As compared to carbon dioxide, dry chemical has which advantage? ______.
A.Cleaner
B.Effective on metal fires
C.Greater range
D.More cooling effect
第5题
Theoretical perfect combustion in a diesel engine yields by-products of_____.
A.aldehydes and carbon dioxide
B.water vapor and carbon monoxide
C.nitrogen and carbon monoxide
D.water vapor and carbon dioxide
第6题
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
第7题
amount of carbon dioxide as three average cars do in a year
A.Right
B.Wrong
C.Not mentioned
第8题
An advantage of a dry chemical over a carbon dioxide fire extinguisher is its ______.
A.greater range
B.effectiveness on all types of fires
C.cleanliness
D.All of the above
第9题
An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.
A.lack of toxicity
B.the multipurpose extinguishing ability
C.burn-back protection
D.cooling ability
第10题
In the event of fire in a machinery space,______.
A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failed
B.the fixed carbon dioxide system should be used immediately,as it is the most efficient means of extinguishment
C.water in any form should not be used as it will spread the fire
D.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
第11题
A carbon dioxide fire extinguisher should be recharged ______.
A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
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