A、A.The tank is safe to enter
B、B.The tank is especially dangerous to enter
C、C.Carbon monoxide is present
D、D.Water vapor present when the tank was sealed has oxidized
更多“A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）”相关的问题
A、A.steel surfaces consume oxygen by rusting B、B.sealed tanks usually form a vacuum C、C.moisture condenses in the tank, displacing the oxygen D、D.most tank coatings give off poisonous vapors in the presence of moisture
A、No placard is required; the tank openings must be sealed B、Empty placard with corrosive placard C、Residue label with the UN number D、Black and white corrosive placard
A、sounding the tank B、waiting for the vessel to list C、examining tank boundaries D、checking fuel oil strainers
A、an air leak has developed in the tank B、the tank cooling system has malfunctioned C、the pilot cylinder discharge valve is leaking D、an excessive amount of insulation has been installed on the tank and piping
A、an air leak has developed in the tank B、the tank cooling system has malfunctioned C、the pilot cylinder discharge valve is leaking D、an excessive amount of insulation has been installed on the tank and piping
A、A new default gateway has been setup. B、A new Internet shortcut has been added. C、A new web browser has been installed and is now the default. D、A proxy server has been enabled.
A、the ship has been named B、the ship has been built C、the ship has been signed D、the ship has been registered
A、the search has found nothing B、the derelict has been found C、the derelict has been located D、the derelict has been sighted
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