单项选择题
A fifteen-pound CO2 extinguisher（）.
A.contains 15 pounds of CO2
B.weighs 15 pounds when full of CO2
C.has 15 pounds of pressure at the nozzle
D.weighs 15 pounds when empty
点击查看答案&解析
相关考题
-
单项选择题
Records of tests and inspections of a cargo vessel’s fire extinguishing systems shall be（）on board until the vessel’s Certificate of Inspection expires.
A.consealed
B.detained
C.contained
D.kept -
单项选择题
Accumulations of oily rags should be（）.
A.kept in nonmetal containers
B.discarded as soon as possible
C.cleaned thoroughly for reuse
D.kept in the paint locker
