A、a heater
B、a pre-heater
C、an exhaust gas boiler
D、the coal burning boiler
更多“At normal sea going, we use （） instead of donkey boiler.”相关的问题
A、Sailors keep uplook at sea. B、Sailors keep outlook at sea. C、Sailors keep lookout at sea. D、Sailors keep lookup at sea.
A、A.to provide a solution of lowering pollution at sea B、B.to specify minimum standards for the members composing the watch at sea C、C.to specify minimum standards for ships considering their safety D、D.to tell the company how to go about running their business
A、the same, whether at sea, or during maneuvering B、adjusted during each hour of operation while at constant RPM C、higher at sea than while maneuvering D、lower at sea than while maneuvering
A、maximum power at a normal load B、maximum power and load under normal conditions C、half speed and normal temperature D、normal operating temperature without a load
A、A.be damaged B、B.work normally regardless of harmful conditions C、C.not wok though it is not in a bad condition
A、after its arrival at the destination B、during the ship's voyage at sea C、before they come to the dock D、during the time when the loading or diacharging is going on
A、A.run as fast as the boat will go and keep the sea on the stern B、B.secure the engine，put sea anchor over the bow，put out the oars，use sweep oar and back onto beach C、C.go in under oars and put out the sea painter D、D.put the sea broadside and let the boat drift ashore
A、A.Each compulsory vessel must carry at least two licensed GMDSS Radio Operators at all times while at sea B、B.Each compulsory vessel must carry at least two licensed Radio Operators at all times while at sea and may elect to carry a GMDSS Radio Maintainer as well C、C.Communications involving safety of life at sea do not have to be logged as long as the compulsory vessel was not involved in such communications D、D.While at sea，adjustments to，and the maintaining of，GMDSS equipment may be performed by the GMDSS Radio operator as long as the work is supervised by an onboard licensed GMDSS Radio Maintainer
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