单选

You are on a cargo vessel carrying portable tanks of dangerous cargoes in bulk.Which statement is TRUE ()_.

A.If the tanks are pumped out while remaining on board，each hose connection must have a minimum of three bolts
B.If the tanks are off loaded，no more than two tanks may be lifted together in a hoist
C.When transferring sulfuric acid，you must display a red flag by day whether at anchor or moored
D.All electrical equipment within 10 feet horizontally must be explosion proof or intrinsically safe

试题出自试卷《大副航海英语船员考证题库试卷(1)》

参考答案

查看试卷详情

相关试题

A flashing light is a light that ().
- A.flashes at regular intervals at a frequency of 120 flashes or more per minute
- B.is yellow in color
- C.is visible over an arc of the horizon of not less than 180° nor more than 225°
- D.All of the above
点击查看答案
Allowances may be made for the expansion and contraction in piping by the use of expansion joints or ().
- A.Unions
- B.Retractable flanges
- C.Union bulkhead fittings
- D.Bends or loops in the line
点击查看答案
You see a vessel displaying three lights in a vertical line.The highest and lowest lights are red and the middle light is white.She is also showing a white light at the stern，which is lower than the forward light.It could be a ().
- A.Survey vessel
- B.Vessel not under command
- C.Vessel aground
- D.Pilot vessel with port side to you
点击查看答案
For optimum stability during jacking operations，mat ballast tanks or spud cans should be ().
- A.empty
- B.fully ballasted
- C.partially ballasted
- D.sealed
点击查看答案
A vessel will NOT show sidelights when ().
- A.underway but not making way
- B.making way，not under command
- C.not under command，not making way
- D.trolling underway
点击查看答案
A mercurial barometer at sea is subject to rapid variations in height(”pumping”)due to the pitch and roll of the vessel.To avoid this error，measurements of atmospheric pressure at sea are usually measured with a(n)().
- A.Syphon barometer
- B.Cistern barometer
- C.Aneroid barometer
- D.Fortin barometer
点击查看答案
()is where the crew eat their meals.
- A.the funnel
- B.the messroom
- C.the galley
- D.the satellite antenna
点击查看答案
If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit，you should ().
- A.inflate the life raft on deck
- B.roll the life raft over the side
- C.go to another life raft station
- D.get a saw and cut the life raft free
点击查看答案
The term flood current refers to that time when the water ().
- A.is flowing towards the land
- B.is moving towards the ocean
- C.level is not changing
- D.level is rising because of heavy rains
点击查看答案
Fighting a fire in the galley poses the additional threat of ().
- A.contaminating food with extinguishing agent
- B.spreading through the engineering space
- C.loss of stability
- D.a grease fire in the ventilation system
点击查看答案