On the all-purpose nozzle，the position of the valve when the handle is all the way forward is（）.

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.

Chemical Tankers are generally referred to the cargo ships constructed or adapted and used for the carriage of（）.

In order to reduce the accumulation of static electricity while loading petroleum products，you should（）.

Protective clothing must be worn while sampling hazardous cargo on a tanker，and as a minimum includes（）.

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（）.

Each fireman’s outfit and its spare equipment on a tanker must be stowed in a(n)（）.

Oil may NOT be transferred unless（）.

Of the following，the most important consideration for a tanker is（）.

Litmus paste is used in order to determine（）.