Heavy fuel oils when spilled are（）.

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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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• If,during helicopter refueling operations,fuel is spilled on clothing,the person should first（）.

  A . see the medic immediately B . spray hinself with foam or CO C . complete his task and then see medic D . remove the clothing and wash

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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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• In discussing oil pollution, one important fact to remember is that the problem remains the same （） heavy （） light oil is spilled into the water.

  A . both；and B . whether；or C . neither；nor D . because；so

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• Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）

  A . Glazing of the cylinder liners B . Increase valve wear C . Excessive oil pumping D . Increase fuel consumptio

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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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• In cleaning up an oil spill, the use of chemical agents would （）.

  A . absorb the oil for easy removal B . remove the oil from the water C . disperse or dissolve the oil in the water D . not affect the oil

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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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• 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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• 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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• 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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• Small oil spills on deck can be kept from going overboard by（）.

  A . driving wooden plugs into the vents B . closing the lids on the vents C . plugging the scuppers D . plugging the sounding pipe

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• Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）

  A . filtering B . centrifuging C . depositing D . operating

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• Lubricating oil should be changed on a heavy duty diesel engine when（）.

  A . it gets dark in color B . a sample rubbed between fingers feels thin C . it has been in use for a specified interval D . it no longer supports combustio

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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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• An inland oil barge must have equipment available to remove an on-deck oil spill of at least（）.

  A . one barrel B . two barrels C . five barrels D . ten barrel

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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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• Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）

  A . prevent heat corrosion to internal components B . increase fuel delivery rate and economy C . prevent pre-ignition D . avoid carbonization of the nozzle ti

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• Heavy residual fuel oils are heated prior to centrifuging to （）

  A . reduce fuel weight B . increase specific gravity C . separate fuel from lube oil D . reduce fuel viscosity

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

  A . filter to remove the fuel oil B . use the settler to remove the fuel oil C . remove the fuel oil by centrifuging D . drain and then renew the lube oil supply

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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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