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

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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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• In a typical fuel system, the oil is stored in （） in the double bottom.

  A . setting tanks B . service tanks C . tanks D . drain tank

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• When the fuel oil is burning in the combustion chamber, it （）.

  A . gives up large amount of heat B . gives off large amount of heat C . gives up large amount of steam D . gives off large amount of steam

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• The ash content of a fuel oil is significant to the operating engineer because it （）

  A . is an indication of the amount of noncombustible material present in the oil B . indicates the quantity of energy released by burning a unit amount of the fuel C . is useful for determining proper atomization temperatures D . reflects the overall thermal efficiency of the fuel oil service system

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• What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）

  A . White B . Black C . Blue D . Clear

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• Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）

  A . Impurities B . Lube oil C . Gasoline D . Diesel fuel

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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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• When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（） Ⅰ.filtering Ⅱ.settling

  A . Ⅰ only B . Ⅱ only C . either Ⅰ or Ⅱ D . neither Ⅰ or Ⅱ

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• When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oil

  A . (1) only is correct B . (2) only is correct C . both (1) and (2) are correct D . neither (1) or (2) are correct

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• Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）

  A . electronic ignition system B . compression of air by the piston C . friction in the fuel injector D . fuel oil bearing system

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• Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.

  A . have nothing to do with B . having nothing to do with C . have much to do with D . having much to do with

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• Obviously, for a given fuel oil, its pour point is （） its cloud point.

  A . lower than B . higher than C . as same as D . better tha

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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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• The specific gravity of fuel oil is a （）.

  A . absolute value B . relative value C . constant value D . set value

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• The temperature of the fuel oil received during bunkering operations is critical in determining the（）

  A . expansion space to leave in a tank B . flash point at which the fuel will burn C . temperature to which the fuel must be heated D . rate at which the fuel can be pumped during transfer operatio

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• A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter

  A . Ⅰonly B . Ⅱonly C . eitherⅠorⅡ D . neitherⅠnor

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• Fuel oil discharged to the diesel engine cylinder is atomized at the （）

  A . turbocharger B . injection nozzle tip C . carburetor D . fuel oil pum

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• The fire of fuel oil is classified as（） fire.

  A . Class A B . Class B C . Class C D . Class D

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• If you detect oil in the water around your vessel while discharging fuel, the FIRST thing to do is（）.

  A . try to find out where the oil is coming from B . call the Master C . have the pump man check the discharge piping D . shutdown operatio

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• Fuel oil day tanks for diesel engines must be checked and cleaned and cleaned at regular intervals in order to remove（）

  A . sludge B . water C . micro-organism growth D . all of the above

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• Proper filtering and straining of fuel oil is important because the （）.

  A . fuel oil pump will over-speed if dirt is not removed B . fuel oil transfer pumps cannot tolerate small amounts of dirt in the oil C . fuel injectors may be damaged by foreign particles in the fuel oil D . dirty fuel will clog the intake air filter

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• The percentage of impurities in a specific fuel oil sample is determined by （）.

  A . settling in a fuel tank B . testing in a laboratory centrifuge C . burning in a calorimeter D . testing in a closed cu

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• In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

  A . a service tank B . a collecting tank C . a sump D . a settling tank

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• In purification, there is no fuel oil in the clean oil outlet.It could be caused by _____. I.too high temperature of the dirty fuel oil; II. too low temperature of the dirty fuel oil; III. Clogged filter

  A．I B．I．II．III C．II．III D．II

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