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

If the Certificate of Inspection of a damaged tank barge has expired，which certificate may be issued to allow its movement to a repair facility? （）

Notwithstanding the provisions of this Regulation，the segregated ballast conditions for oil tankers less than 150 meters in length shall be to the（）of the Administration.

Individual wires，used in systems greater than 50 volts,（）.

How must each storage tank for helicopter fuel on a ship be marked?（）

Any oil tanker which is not required to be provided with segregated ballast tanks in accordance with this paragraph may，however，be qualified as a segregated ballast tanker （）it complies with the other requirements of paragraphs of this Convention.

During oil transfer operations，who is responsible for ensuring that the posted transfer procedures are followed?（）.

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.

Every new crude oil tanker of 20000 tons deadweight and above and every new product carrier of 30000 tons deadweight and above shall be（）with segregated ballast tanks.

For the purpose of（）tank or hold washings from any vessel，an application shall be made to Harbor Authorities for approval.