【正文】 refighting agent is most effective at removing heat?A. FoamB. Dry chemicalC. Carbon dioxideD. Water spray答案：D20. A vessel is when she is not at anchor, made fast to the shore, or aground.A. making wayB. underwayC. dead in the waterD. a power driven vessel答案：B21. Horizontal fore or aft motion of a vessel is known as A. surgeB. pitch C. rollD. sway答案：A22. Where there are multiple accident victims, which injuries should be the FIRST to receive emergency treatment?A. Major multiple fracturesB. Eye injuriesC. Back injuries with spinalcord damageD. Airway and breathing difficulties答案：D23. The radio waves used for radar are very short, only long.A. a few centimetersB. a few feetC. a few metersD. a few fathoms答案：A24. The difference between the initial trim and the trim after loading is known as A. trimB. change of draftC. change of trimD. final trim答案：C25. The term of landfall means A. Land first sighted when vessel approaching from seawardB. In sight of an island during a ship on her voyageC. In sight of one another when vessel underwayD. Land last sighted when vessel leaving from a port答案：A26. is a full nautical record of a ship’s voyage, written up at the end of each watch by the officer of the watch.A. Sea ProtestB. Accident ReportC. Deck Log’D. Seamen’s Book答案：C27. Which approved lifesaving device is required for each person on board a motor vessel carrying passengers?A. Buoyant vestB. Ring life buoyC. Buoyant cushionD. Life jacket答案：D28. A man aboard a vessel, signaling by raising and lowering his outstretched arms to each side, is indicating A. all is clear, it is safe to approachB. all is clear, it is safe to passC. danger, stay awayD. a distress signal答案：D29. A relative bearing is always measured from A. the vessel’s headB. magnetic northC. true northD. the vessel’s beam答案：A30. High pressure ridge from Sevastopol to eastern Libya.A. reachingB. upgradingC. increasingD. extending答案：D31. Which general weather conditions should you expect to find in a low pressure system?A. Fair weather B. Scattered clouds at high elevationsC. Precipitation and cloudinessD. Gradual clearing and cooler temperature答案：C32. The best way to determine id a load is within maximum lifting limits is to use A. a load weight indicatorB. a boom angle indicatorC. prior experience with similar liftsD. material invoices for shipping weights答案：A33. As a last resort, a tourniquet can be used to A. hold a victim in a stretcherB. stop uncontrolled bleedingC. restrain a delirious victimD. hold a large bandage in place答案：B34. When will the floatfree emergency position indicating radiobeacon be activated after abandoning ship?A. Immediately after floating freeB. After about one hour when the salt water activates the batteryC. Only when keyed by radar of another vesselD. Only when daylight activates the photovoltaic cell答案：A35. A wire rope that has been overstrained will show A. a kink in the wire where the strain occurredB. a decrease in diameter where the strain occurredC. no visible effects of an overstrainD. a bulge in the wire where the strain occurred答案：B36. Which davit type can be operated by one man?A. SheathscrewB. RadialC. GravityD. Quadrantal答案：C37. A DECK, SPACE, AREA,ETC., NOT PERMITTED TO BE ENTERED FOR SAFETY REASONS defines A. Restricted areaB. Closed areaC. Forbidden placeD. Prohibited place答案：A38. Damage to cargo caused by fum