Cleaner
Effective
Greater range
More cooling effect
第1题：
Carbon dioxide as a fire fighting agent has which advantage over other agents?
A.It causes minimal damage
B.It is safer for personnel
C.It is cheaper
D.It is most effective on a per unit basis
第2题：
______, as the chemical extinguisher agent, should be used for an electric fire.
A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical
第3题：
Which of the following is (are)an advantage of a dry chemical extinguisher over a carbon dioxide extinguisher？The dry chemical extinguisher：Ⅰ．Has a greater range．Ⅱ．Provides a heat shield for the operator．
A.Ⅰonly
B.Ⅱonly
C.Both Ⅰand Ⅱ
D.Neither Ⅰ nor Ⅱ
第4题：
Which of the following is an advantage that a USB mouse has over a PS/2 mouse?（）
第5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6题：
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
第7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8题：
Of all the extinguishing agents listed below，which one has the greatest capacity for heat absorption？
A.Water fog
B.Carbon dioxide
C.Dry chemical
D.Solid stream of water
第9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10题：
replaced in its proper location if weight loss is no more than 15%
replaced in its proper location if weight loss is no more than 25%
labeled empty and recharged as soon as possible
labeled empty and replaced in its proper location regardless of weight