18、fuel tank

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• The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.

  A . quantity of fuel to be received B . flash point of the fuel as it is received C . fuel temperature as it is received D . viscosity of the fuel being received

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• 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 compartment

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• Fire protection regulations for towing vessels require any fuel line subject to internal head pressure from fuel in the tank to（）.

  A . be fitted with a positive fuel shut-off valve located at the tank B . have a shut-off valve at the top of the tank C . have a gate valve easily accessible in the space where the tank is located D . have a drain cock at the lowest point in the fuel line

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• Each drilling unit equipped with helicopter fuel storage tanks must have the tanks installed as far as practicable from the（）.

  A . landing area and sources of vapor ignition B . main deck C . engine room D . drill floor

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• The sequence of parts in a generally used fuel oil supply system for a main engine is （） (1)tanks in the double bottom (2)centrifuges (3)service tank (4)settling tank (5)viscosity regulator

  A . (1)-(2)-(4)-(3)-(5) B . (1)-(4)-(2)-(3)-(5) C . (1)-(3)-(2)-(4)-(5) D . (1)-(5)-(4)-(2)-(3)

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• Before being used the fuel service tank should be drained of （）.

  A . soda solution B . mechanical impurities C . ballast D . water and residual

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• The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to （）.

  A . secure all openings to the tank B . discharge an initial charge of CO with a hand portable extinguisher C . direct a fire hose into the tank and energize the fire main D . spray the tank boundaries with a fire hose to promote cooling

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• In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.

  A . secure all sources of fresh air to the tank B . begin transferring the fuel to other tanks C . top off the tank to force out all vapors D . station someone at the fixed CO release control

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• When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）

  A . plugging gooseneck tank vents to prevent accident overflow B . maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow line C . sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fill D . maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the shi

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• Fuel oil tank vents are fitted with a screen which will stop（）.

  A . oil from flowing out of the tank vent B . air from entering the tank vent C . vapors from leaving the tank vent D . flames on deck from entering the tank vent

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• Gasoline fuel tank vents should terminate（）.

  A . in the engine compartment B . in the fuel tank space C . above or outside the hull D . at the most convenient locatio

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• If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.

  A . close the static leg filling valve B . close the overflow tank falling valve C . reduce the fuel oil pumping rate D . stop the fuel oil pumping operatio

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• The （） or balance tank collects the re-circulated fuel oil.

  A . overflowing B . sump C . bilge D . buffer

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• The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tank

  A . Ⅰonly B . Ⅱ only C . bothⅠand Ⅱ D . neitherⅠor Ⅱ

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• When preparing a ship for heavy weather，fuel oil day tanks should be（）.

  A . pumped overboard to calm the seas B . drained to the lower hull to reduce free surfaces C . filled to ensure that sufficient fuel oil is available during a lengthy emergency D . partially drained to increase free surfaces in order to reduce motio

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• Fuel oil is pumped by means of （） from the bunker tanks.

  A . a transfer pump B . a bilge pump C . a service pump D . a vacuum pum

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• If fuel is burned from only the starboard tanks, the ship will （）.

  A . go down by the head B . list to starboard C . trim by the stem D . list to port

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• Following a grounding, you can best determine that a SLACK fuel oil tank has been holed by （）.

  A . sounding the tank B . waiting for the vessel to list C . examining tank boundaries D . checking fuel oil strainer

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• Fuel oil is regularly transferred to the day tank in order to （）

  A . allow impurities to settle out of the fuel B . allow air to escape from the fuel C . make fuel available for immediate use D . all of the above

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• You are transferring fuel from the storage tanks to the day tanks by means of an electric fuel oil transfer pumpIf the pump motor catches fire, you would FIRST （）.

  A . secure the fuel manifold B . shut off power to the pump C . shut off the power ventilation D . spray water on the fire

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• During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）

  A . Reduce the pumping rate by closing the deck filling valve B . Close all overflow valves C . Place 5 gallon containers under all flange connections in the fuel line D . Reduce the pumping rate and sound tanks frequently as the level rise

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• If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）

  A . gas freed B . inerted C . filled with water D . all of the above as necessary

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• The fuel tank has a ( ) of 50 litres.

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