The use of sinking and dispersing chemical agents for removal of surface oil is ______.A.the most common method used in the United StatesB.too expensive for common useC.generally safe to sea lifeD.authorized only with prior approval of the Federal On-Scen

Coalescence(聚合) is the breakdown of surface tension between oil droplets in an oil/water mixture, which causes them to join and ______in size.

A.expand

B.extract

C.increase

D.decrease

Oil slick caused by spillage of oil from tanker ship is ______.

A.a drop of oil

B.the emulsion of oil at sea surface

C.the weathered oil

D.the oil floating on the surface of the sea water

In cleaning up an oil spill, the use of chemical agents would______.

A.absorb the oil for easy removal

B.remove the oil from the water

C.disperse or dissolve the oil in the water

D.not affect the oil

Which of the following may be used in cleaning up an oil spill without the permission of governmental authorities ________．

A.Straw and Skimmers only

B.Skimmers and Chemical dispersants only

C.Straw and Chemical dispersants only

D.Straw，Skimmers and Chemical dispersants

Fueling results in the collection of waste oil in drip pans and containers. Which is an approved method of disposing of the waste oil?

A.Draining it overboard when the vessel gets underway

B.Placing it in proper disposal facilities

C.Adding sinking agents and discharging it into the water

D.Mixing it with dispersants before draining it overboard

International Certificate of Fitness for the Carriage of Dangerous Chemicals in Bulk shall be carried on board by ______．

A.chemical tankers constructed on or after 1 July 1986

B.chemical tankers constructed before 1 July 1986

C.All chemical tankers

D.oil tankers of 150 gross tonnage and above

The most common type of containment device for spilled oil on the water is the use of _____.

A.straw

B.booms

C.skimmers

D.chemical dispersants