航海英語液體散貨運(yùn)及有關(guān)規(guī)則單項(xiàng)選擇題每日一練(2019.01.14)

來源：考試資料網(wǎng)

1 Existing crude oil tankers may，（）being provided with segregated ballast tanks or operating with a cargo tank cleaning procedure using crude oil washing，operate with dedicated clean ballast tanks in accordance with the specified provision of the Regulation.

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2 A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.

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3 Each fire pump on a tanker must have a pressure gauge located at（）.

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4 On a vessel carrying grades A，B，C or D cargoes，enclosed spaces where sources of vapor ignition are normally present shall NOT be segregated from cargo tanks by（）.

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5 In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.

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