单项选择题
A.exclusion of all sand and solid matter B.cleaning with clean fresh or sea water C.examination for fractures and pitting D.All of the above
It should be noted（）the use of synthetic mooring ropes ...
单项选择题It should be noted（）the use of synthetic mooring ropes able to produce sparks by their manipulation is absolutely forbidden on board petroleum tankers and LPG or LNG carriers，or any vessels carrying inflammable substances.
A.that B.which C.who D.these
If you have a liquefied flammable gas barge in tow，whic...
单项选择题If you have a liquefied flammable gas barge in tow，which is NOT required of you with respect to the barge and its cargo? （）
A.Make periodic inspections of bilges B.Keep the barge under constant surveillance C.Have a properly certificated tankerman or at least one licensed officer on board the towing vessel D.Verify ullage readings
Gasoline vapor tends to collect（）.A.above the floor pla...
单项选择题Gasoline vapor tends to collect（）.
A.above the floor plates of the bilges B.above the carburetor level C.at the lowest point of the bilge areas D.at no particular level
