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

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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 of the actions listed should be taken FIRST to control an oil fire in a fuel oil tank?（）

  A . Commence draining that tank as quickly as possible B . Seal off all vents to that tank C . Activate the CO system to that tank D . Shut off the steam heating coil

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• Fuel oil tanks must be fitted with （） that can be closed rapidly and remotely in the event of an emergency such as a fire.

  A . stop valves B . non-return valves C . quick closing valves D . relief valve

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• Diesel engine fuel oil contamination often results in （）

  A . governor malfunctions B . fuel injection system malfunctions C . high cylinder lube oil temperatures D . low intake temperature

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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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• The burning of fuel oil in a diesel engine having a high sodium content, will cause （）

  A . corrosion and grooving of exhaust valves B . corrosion and gumming of the fuel injection pump C . salt deposits in the exhaust manifold D . slag deposits in the fuel injection equipment

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• Dirt in the fuel oil system of a diesel engine can cause （）.

  A . clogged filters B . poor combustion C . overloading of the diesel D . shock of fuel line

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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 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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• Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）

  A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

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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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• Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）

  A . grinding the spare plunger to the barrel B . replacing the plunger and the barrel C . highly polishing both the plunger and barrel D . replacing plunger only

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• Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）

  A . increased fuel consumption B . increased feed water consumption C . fuel pump failure D . combustion control system failure

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• Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce（）.

  A . cold corrosion of the nozzles B . fuel viscosity for better atomization C . carbon accumulation on the nozzles D . fuel detonation in the cylinder

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• The FIRST step to take in fighting an engine room fire resulting from a ruptured fuel oil service line, is to （）.

  A . evacuate all engine room personnel B . fight the fire with hand portable extinguishers C . activate the main CO bank D . stop the flow of leaking fuel oil

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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 having a low cetane rating could result in（）

  A . improved cold weather starting B . excessive fuel oil consumption C . reduced ignition lag D . smoother engine operatio

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• The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）

  A . clogged fuel injection pumps B . increased cylinder liner wear C . intake valve stem corrosion D . varnish deposit on pisto

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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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• 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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• 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

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• Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.

  A . notify the terminal superintendent B . place a large drip pan under the leak and ping the scuppers C . repair the hose with a patch D . replace the hose

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• When the heavy fuel oil is heated to achieve the viscosity of 10-15 cSt, may occurTo avoid this, a system is used in most occasions.

  A.boiling and cavitations; low temperature B.boiling and cavitations; pressurized C.leaking and boiling; low temperature D.leaking and boiling; pressurized

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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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