单选

What is NOT a distress signal ().

A.A continuous sounding of the fog horn
B.Firing a gun every minute
C.Five or more short rapid blasts on the whistle
D.A square flag and ball flown from the mast

试题出自试卷《大副航海英语考试题(1)》

参考答案

查看试卷详情

相关试题

For the purpose of training and drills，if reasonable and practicable，rescue boats on board must be launched with their assigned crew ______.
- A.once a week
- B.once a month
- C.once a year
- D.twice a year
点击查看答案
The height of tide is the ().
- A.Depth of water at a specific time due to tidal effect
- B.Difference between the depth of the water and the area's tidal datum
- C.Difference between the depth of the water and the high water tidal level
- D.Difference between the depth of the water at high tide and the depth of the water at low tide
点击查看答案
The horizontal fore-and-aft movement of a vessel is called ().
- A.yaw
- B.sway
- C.heave
- D.surge
点击查看答案
Index error of a sextant is primarily caused by ().
- A.Improperly correcting the other errors in a sextant
- B.The horizon glass not being parallel to the horizon mirror
- C.The horizon glass not being parallel to the index mirror
- D.Human error in taking a celestial observation
点击查看答案
Which of the following statements regarding low expansion foam and its application is INCORRECT ().
- A.Foam should not be used on electrical fires
- B.One kilo of low expansion foam solution produces much more foam
- C.Foam is only efficient when it covers the top of burning combustibles
- D.A stream of foam should be deflected off the deck in order to best agitate the fire
点击查看答案
You can expect frontal activity when two air masses collide and ().
- A.their barometric pressures and temperatures are the same
- B.there are differences in how they track along the jet stream
- C.there are no significant differences between their temperatures and moisture content
- D.there are significant differences between the temperature of each air mass
点击查看答案
The pilot motor launches are ______ blue，with the PILOT in whit
- A.furnished
- B.painted
- C.prepared
- D.provided
点击查看答案
Timber can be stowed ().
- A.Only on deck
- B.Only in holds
- C.In forecastle，bridge and poop
- D.Both on deck and in holds
点击查看答案
Vertical partitions providing strength and compartmentation on a ship are called ().
- A.decks
- B.bulkheads
- C.joiner work
- D.walls
点击查看答案
Which devices may be used as part of an internal communication system on a towing vessel ().
- A.Sound-powered telephones
- B.Portable radios
- C.Either fixed or portable equipment
- D.All of the above
点击查看答案