Poor combustion in a diesel engine can be caused by （）.

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• A fire starting by spontaneous combustion can be expected in which condition?（）.

  A . Paints，varnish，or other liquid flammables are stowed in a dry stores locker B . Inert cargoes such as pig iron are loaded in a wet condition C . Oily rags are stowed in a metal pail D . Clean mattresses are stored in contact with an electric light bul

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• Each cylinder in a two stroke cycle engine experiences combustion（）.

  A . once each crankshaft revolution B . twice each crankshaft revolution C . every other crankshaft revolution D . every fourth stroke

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• Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

  A . a shortened ignition delay period B . a lean fuel/air mixture C . excess fuel in the combustion chamber D . rapid vaporization of injected fuel droplet

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• A cast steel strong back is fitted in way of the combustion space to help absorb （）.

  A . flame temperature B . fuel oil C . air movement D . gas force

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• Theoretical perfect combustion in a diesel engine yields by-products of （）.

  A . aldehydes and carbon dioxide B . water vapor and carbon monoxide C . nitrogen and carbon monoxide D . water vapor and carbon dioxide

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• Combustion gases formed in the cylinder of a diesel engine are prevented from blowing past the piston by （）

  A . cylinder valves B . compression rings C . piston skirts D . oil ring

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• The most likely place for a fire to start through the process of spontaneous combustion is in （）.

  A . an electrical switchboard B . the pressure tanks C . the fuel oil tanks D . the oily rag bi

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• Black smoke exhausting from an operating diesel engine is an indication of poor combustion which may be caused by （）

  A . water in the fuel B . insufficient fuel for combustion C . clogged air intake passages D . burning lubricating oil

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• Combustion knock occurring in a diesel engine can be caused by （）

  A . low coolant temperature B . insufficient fuel C . high ambient temperature D . carbon buildup on the injector ti

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• Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）

  A . residual carbon deposits B . lube oil viscosity breakdown C . uneven heat expansion of the rings D . uneven heat expansion of the pisto

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• Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.

  A . class A B . class B C . class C D . class D

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• What is commonly used to create turbulence in a diesel engine combustion system?（）

  A . Shape of the piston crowns B . Increasing the compression ratios C . Increasing the piston crowns D . Increasing the turbocharger gear ratio

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• What determines the number of events occurring in a cycle of operation in an internal combustion engine?（）

  A . Crankshaft revolution B . Type of engine (diesel or gasoline) C . Distance a piston travels during a stroke D . Number of pisto

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• In order for combustion to occur inside a piping system such as a vapor collection header in a marine emmission control system，there must be（）.

  A . fuel B . oxygen C . ignition D . All of the above

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• Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）

  A . Atomization B . Metering C . Effective stroke D . Penetratio

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• Poor combustion in a diesel engine can be caused by （）.

  A . high compression pressure B . low intake air temperature C . low exhaust pressure D . high scavenge air temperature

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• Proper combustion in a boiler would be indicated by （）.

  A . yellowish flame B . golden yellow flame C . white flame D . brilliant white flame

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• A poor man has to ＿ many things which a rich man regards as almost necessities in life.

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• In World War II, the great soldier gave his life ____ a poor little boy.

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• Bill Gates has made a fortune by investing money in poor areas.

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• It is a contradiction that in such a rich country there should be so many poor people.

  A．pageant B．patronage C．paradox D．pendulum

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• Theoretical perfect combustion in a diesel engine yields by-products of_____.

  A.aldehydes and carbon dioxide B.water vapor and carbon monoxide C.nitrogen and carbon monoxide D.water vapor and carbon dioxide

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• It's often a mistake to______appearance: that poor-looking individual is anything but poor. In fact, he is a millionaire.

  A．go over B．go by C．go against D．go for

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• In a _____ of self-pity, he cried over his poor childhoo.

  A．burst B．thrust C．rush D．dash

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