Fuel is ignited in a diesel engine cylinder by （）
A . a spark plug
B . injectors
C . the heat of compression
D . increasing jacket water temperature
相似题目
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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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The lowest temperature at which fuel combustion becomes self-sustaining in the presence of a source of ignition, is defined as the （）
A . auto-ignition point
B . flash point
C . burning temperature
D . fire point
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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 ignition quality of diesel fuel is indicated by its（）
A . octane number
B . cetane number
C . viscosity in Saybolt seconds
D . air fuel ratio
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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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What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）
A . Spark plug
B . Heat of compression
C . Carburetor
D . Glow ping
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The ignition quality of a diesel fuel is indicated by the （）
A . cetane number
B . volatility point
C . viscosity index
D . octane number
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In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.
A . secure all sources of fresh air to the tank
B . begin transferring the fuel to other tanks
C . top off the tank to force out all vapors
D . station someone at the fixed CO
release control
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Which of the following statements is least likely to cause the ignition of fuel vapors?（）
A . Static electricity
B . An open running electric motor
C . Loose wiring
D . Explosion proof light
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In a diesel engine, when the fuel is injected into the cylinder,（）
A . the piston is just coming upward from the bottom dead center
B . the piston has moved about one-fifth of the way up
C . the piston has moved most of the way up and almost reached the TDC
D . the piston has just past the TDC
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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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In a common rail engine, the fuel is injected into cylinders（）
A . by injection pumps
B . at a time decided by the injection pump timing
C . by a signal opening the magnetic valves
D . at a time decided by the cam directly
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Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?（）
A . Viscosity
B . Sulfur content
C . Pour point
D . Cetane number
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Diesel fuel is relatively safe to handle due to its low volatility, but the fumes will self-ignite and continue to burn steadily if the fuel is heated to the （）.
A . flash point
B . auto-ignition point
C . volatility point
D . upper explosive limit
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The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.
A . boiling point
B . flash point
C . viscosity point
D . toxic point
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The lowest temperature at which the vapor formed from a liquid ignites and continues to burn steadily in the presence of an ignition source is called the（）.
A . flash point
B . fire point
C . upper explosive limit
D . lower explosive limit
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Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.
A . spark plugs
B . glow plugs
C . heat of compression
D . a magneto
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During working, when the piston is near the （）, the air ignites the fine spray of fuel.
A . TDC
B . DTC
C . BDC
D . BCD
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The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.
A . air bottle
B . air compressor
C . crank case
D . combustion chamber
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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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Late fuel injection in a diesel engine is indicated by low firing pressure with（）
A . high exhaust temperature
B . low exhaust temperature
C . fuel knock in each cylinder
D . mechanical knock in each cylinder
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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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What is LEAST likely to cause ignition of fuel vapors ________．
A.Static electricity
B.An open running electric motor
C.Loose wiring
D.Explosion proof lights
