单项选择题
A class B fire is most successfully fought by（）.
A.preventing oxygen from reaching the burning material
B.cooling the burning material below its ignition temperature
C.using the extinguishing agent to make the burning material fire-resistant
D.using the extinguishing agent to absorb the heat
点击查看答案&解析
相关考题
-
单项选择题
A Certificate of Inspection issued to a small passenger vessel describes（）.
A.the mimimum fire extinguishing equipment，lifejackets，survival and rescue craft she must carry
B.the name of the managing operator
C.any special conditions or restrictions on her operation
D.All the above -
单项选择题
A carburetor is required to have a safety device called a(n)（）.
A.pressure release
B.backfire flame arrestor
C.automatic shut off
D.flow valve -
单项选择题
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
