An emergency sea anchor may be constructed by using ______.A.a boat bucketB.an air tank filled with waterC.an oar and canvas weighted downD.All of the above

You are on a multiple product tanker and carrying methyl acrylate，diethanolamine，and triethylamine. Which statement is TRUE?

A.Methyl acrylate may be loaded in a tank adjacent to diethanolamine but not triethylamine

B.The heating coils to the cargo tank loaded with methyl acrylate must be blanked off

C.Valve components made of aluminum，copper，or zinc may not be in contact with the cargoes

D.Each crew member working on deck must have an emergency escape breathing apparatus

When weighing anchor in a rough sea，how would you avoid risk of damaging the bow plating ________．

A.Heave it home as fast as you can

B.Heave it home intermittently，between swells

C.Leave the anchor under foot，until the vessel may be brought before the sea

D.Wait for a calm spot between seas，then house it

A person may operate an air compressor in which of the following areas on board a tank barge ________．

A.Pumproom

B.Generator room

C.A space adjacent to a cargo tank

D.A space two meters from a cargo valve

Coast Guard approved buoyant work vests ______．

A.may be substituted for 10 percent of the required life preservers

B.should be stowed adjacent to lifeboats and emergency stations

C.may be used by boat crews and line handlers during lifeboat drills

D.should be used when carrying out duties near a weather deck's edge

When removing the cap from a sounding tube on a ship，the sound of air escaping indicates the tank ______．

A.Is full

B.May be partially flooded

C.Level has dropped

D.Is completely flooded

材料:

At 0840 hrs，with the ship&39;s head on 180°，the UNISOL grounded on a rocky bottom，forward of the main engine on her starboard side．A spout of water mixed with oil about 60cm in diameter and 2.5-3m high above the engine room bottom plating was observed，and at which time the main engines seemed to slow down．

The engine room flooded rapidly and the water level soon reached the electro-magnetic couplings，stopping the main engine．In the meantime，on being apprised of the situation，the Master ordered the evacuation of the engine room，which was successfully carried out under the supervision of the 2/E engineer，and the engine room crew were mustered on the boat deck wearing life jackets．

Shortly thereafter，the emergency air cut-off to the engine room and the emergency fuel shut-off were actuated causing the main generator to stop at 0845 hrs．The emergency generator then started up automatically．The starboard anchor was dropped in an attempt to prevent further westward drift．The vessel was by this time being subjected to pounding on the rocks，eventually breaking her back at 0930 hrs after which the violent motion ceased. Evacuation of the vessel commenced at 1045 hrs using 2 SAR helicopters with a Buffalo fixed-wing aircraft in attendance，and was completed at 1220 hours．

问题：

The main engine was caused to stop by the loss of the function of ________．

A.engine room bottom plating

B.emergency fuel shut-off

C.emergency air cut-off

D.electro-magnetic couplings

The reason that the violent motion of the vessel ceased was that ________．A.the starboard anchor was dropped properly to prevent further westward drift

B.the winds and/or seas decreased in a considerable extent

C.the vessel was held fast on the grounding rocks

D.the vessel's back was broken

This report is most likely prepared by ________．A.the master of the vessel

B.the cargo owners of the vessel

C.the shippers of the vessel

D.the independent investigator of the accident

The crew were taken off the vessel by ________．A.air-planes

B.helicopters

C.an fixed-wing aircraft

D.the boat under the supervision of the 2/E engineer

请帮忙给出每个问题的正确答案和分析，谢谢！