单项选择题

A.maintain a strict watch on the barge from the towing ……

While underway and towing an unmanned tank barge you are required to（）.

A.maintain a strict watch on the barge from the towing vessel
B.fly a red flag from the towing vessel
C.open the tops of all empty tanks on the barge
D.take hourly soundings of any loaded tanks on the barge

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热门试题

单项选择题While testing a cargo tank，your oxygen indicator reads 25% oxygen in the tank. You would then （）.

A.enter the tank safely
B.suspect the accuracy of the reading
C.ventilate the tank
D.test for nitrogen

单项选择题Which vessel in ocean service is not subject to Annex V of MARPOL 73 78? （）

A.A 20-foot sailing vessel
B.A 26-foot tug and tow
C.An uninspected 35-foot passenger vessel
D.A Navy Destroyer

单项选择题Which substance is NOT considered to be Oil under the pollution prevention regulations? （）

A.Petroleum and fuel oil
B.Sludge
C.Oil mixed with dredge spoil
D.Oil refuse and oil mixed with wastes

单项选择题Which step is NOT generally taken when gas-freeing a tank?（）.

A.Washing the tank interior with sea water
B.Application of degreasing solvents
C.Removal of corrosion products and sludge
D.Fresh air ventilation

单项选择题Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?（）

A.There shall be at least 3 ventilator ducts open to the atmosphere
B.At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge
C.At least one intake duct shall extend from the open atmosphere to the lower portion of the bilge
D.Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartments