The three basic components of a fire are chain reaction, heat, fuel, and ______.

试卷相关题目

• 1Fires involving combustible metals are classified as ______.

  A.class 'A' fires

  B.class 'B' fires

  C.class 'C' fires

  D.class 'D' fires

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• 2A tank has been sealed and unventilated(不通风的) for a long period of time. Which of the following conditions does this indicate、

  A.The tank is safe to enter.

  B.The tank is especially dangerous to enter.

  C.Carbon monoxide(一氧化碳) is present.

  D.Water vapor present when the tank was sealed has oxidized(使氧化).

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• 3After the order ' ______' is given, the air system is shut down, the turning gear put in.

  A.Finished With Engine

  B.Stop The Engine

  C.Stand-by Engine

  D.Slow-down Engine

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• 4Bridge orders must be ______and a record of any required changes in speed and direction should be kept.

  A.slowly carried away

  B.carried out with a period of delay

  C.promptly carried out

  D.paid by the captain

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• 5Before “stand by” is rung on the engine telegraph, it is usual to give the main diesel engine a brief trial ______ahead and astern.

  A.with power

  B.on power

  C.with air

  D.on air

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• 6CO2 extinguishes a fire by __________.

  A.a blanket of bubbles formed on the surface of the fire

  B.smothering

  C.isolating the heat from the fuel

  D.cooling

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• 7Seawater may be used for drinking water ______.

  A.at a maximum rate of two ounces(盎司) per day

  B.after mixing with an equal quantity of fresh water

  C.if gather during or immediately after a hard rain

  D.under no circumstance

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• 8Obviously, for a given fuel oil, its pour point is ______its cloud point.

  A.lower than

  B.higher than

  C.as same as

  D.better than

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• 9Now that the valve is not worth ______, I suggest it ______.

  A.to repair/renewing

  B.repairing/renewing

  C.to repair/ be renewed

  D.repairing/be renewed

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• 10When a vessel is in dry-dock, the vessel's engineers should ______.

  A.examine the condition of the propeller

  B.chip and paint all hull protection zincs

  C.install new docking plugs in all cofferdams

  D.inspect the hull for hogging or sagging

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