CO2 extinguishes a fire by __________.

试卷相关题目

• 1The three basic components of a fire are chain reaction, heat, fuel, and ______.

  A.carbon monoxide

  B.oxygen

  C.carbon dioxide

  D.any gaseous substance

  开始考试点击查看答案
• 2Fires involving combustible metals are classified as ______.

  A.class 'A' fires

  B.class 'B' fires

  C.class 'C' fires

  D.class 'D' fires

  开始考试点击查看答案
• 3A 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).

  开始考试点击查看答案
• 4After 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

  开始考试点击查看答案
• 5Bridge 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

  开始考试点击查看答案
• 6Seawater 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

  开始考试点击查看答案
• 7Obviously, 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

  开始考试点击查看答案
• 8Now 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

  开始考试点击查看答案
• 9When 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

  开始考试点击查看答案
• 10The additional mark ______in the Classification Certificate for Machinery represents the propulsion apparatus is remotely controlled on the navigating bridge control station, and engine room is watched by duty personnel.

  A.BRC

  B.MCC

  C.AUT-0

  D.AUT-1

  开始考试点击查看答案