A . to keep the boats covered at all times
B . not to leave steel or iron tools lying in or near these boats
C . to keep an electric charge on the hull at all times
D . to rinse these boats regularly with salt water
[单选题]The order to enter the lifeboats will be given from the().A . bridgeB . forward stationC . aft stationD . any hold in which the stevedores are working
[单选题]Aluminum pistons have () coefficient of thermal expansion compared with those of cast iron.A . higherB . lowerC . the sameD . none of the above
[单选题]On open lifeboats,the purpose of the wire stretched between the davit heads is to().A . keep the movement of the davits at the same speedB . keep the davits from slipping when they are in the stowed positionC . prevent vibration during lowering of th
[单选题]Stretchers are fitted in lifeboats to provide a().A . place for people to lie downB . means for rigging the sailC . place for rowers to brace their feetD . suitable means for water to drain below the footing
[单选题]The lifeboats and liferafts were()with the provisions of the regulations annexed to the Convention.A . put on boardB . installedC . fittedD . equipped
[单选题]An advantage of aluminum pistons, when compared to cast iron pistons is ().A . greater high temperature strengthB . better heat conductivityC . greater weight per cubic inchD . increased resistance to wear
[单选题]An aluminum piston has lower inertia and higher coefficient of () compared to that of cast iron.A . viscosityB . twisting momentsC . inertiaD . thermal expansio
[单选题]Most covered lifeboats will right themselves after capsizing if the().A . passengers are strapped to their seatsB . fuel tanks are not less than half fullC . sea anchor is deployed to windwardD . lower ballast tanks are filled with water
[单选题]What is the subject of the paragraph?()A . international tradeB . international transportC . international logisticsD . international economy
[名词解释] reperfusion damage