When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

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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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• Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.

  A . within the space concerned B . outside the space concerned C . the throttle station D . within the fire room

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• Which of the listed conditions can be used to determine if lube oil has been diluted by fuel? （）

  A . Viscosity is decreased B . Octane number is altered C . Pump speed is decreased D . Blower’s speed is decreased

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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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• 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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• When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）

  A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

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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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• 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 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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• Heavy fuel oils when spilled are（）.

  A . more harmful to sea life than lighter oils B . easier to clean up than lighter refined oils C . less harmful to sea life than lighter oils D . not a real threat to marine life

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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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• When fueling has been completed（）.

  A . the fuel tank fill pipe should be left open to allow vapors to vent from the tank B . the engine should be started immediately to prevent vapor lock in the fuel line C . all hatches should be opened and all compartments should be ventilated D . open the fuel line and drain a small amount of gasoline into the bilge to clear the line of sediment

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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 comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）

  A . the amount of lube oil additives increase B . piston speeds increase C . injection pressure decrease D . engine speeds decrease

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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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• If fuel oil were being discharged from the waster outlet of a fuel oil disk type centrifuge, operated as separator, you should（）

  A . remove the discharge ring B . re-prime the purifier C . the centrifuge to its proper speed D . install an additional discharge ring

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• Which of the following problems may occur when using fuel oil with a high sulphur content?（）

  A . Injection lag B . Lube oil dilution C . Pre-ignition D . Corrosio

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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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• 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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• When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.

  A . air from contacting the oil vapors B . permitting re-ignition boiling of the heated oil C . spontaneous combustion below the oil surface D . toxic fumes from escaping to the surface

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• Your vessel has just finished bunkering and has a small list due to improper distribution of the fuel oil. This list will cause（）.

  A . a decrease in reserve buoyancy B . a decrease in the maximum draft C . the vessel to flop to port or starboard D . None of the above

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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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