Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）

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• Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）

  A . Low cooling water outlet temperature B . High lube oil pressure C . Low lube oil temperature D . Low starting air pressure

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• Which of the precautions listed should be observed when taking on diesel fuel?（）

  A . Secure all lighting to the main deck B . Provide a portable fan to blow away fumes C . Prohibit smoking in the area D . Display a black triangle during daylight hour

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• Which of the listed effects represents the purpose of heat treating steel?（）

  A . Develop ductility B . Improve machining qualities C . Relieves stresses D . All of the above

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• Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）

  A . Impeller B . Compressor C . After-cooler D . Exhaust differ

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• When the diesel is stopped, which of the following items is wrong?（）

  A . keep all systems in normally running B . the main engine is stand-by C . shut off the starting air bottle outlet valve D . pay attention to the changes of the system parameter

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• Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）

  A . Sensitivity B . Power C . Speed droop D . Compensatio

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• Which of the following statements is true concerning the cetane number rating of diesel fuel? （）

  A . The cetane number is obtained by comparing the fuel with cetane a colorless liquid hydrocarbon B . The higher the cetane number, the shorter the ignition lag C . The highest cetane number of fuel is 100 D . All of the above

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• If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）

  A . Fuel B . Lubricating C . Cooling D . Ignitio

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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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• Which of the processes listed consumes the greatest amount of power while producing the greatest amount of heat?（）

  A . Overcoming sliding friction B . Overcoming rolling friction C . Overcoming fluid friction D . Overcoming oil wedge frictio

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• Which of the petroleum products listed has the lowest flash point?（）

  A . Hydraulic oil B . Lubricating oil C . Diesel oil D . Refrigeration oil

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• Which of the following are characteristics of named access lists?（）

  A . Individual statements in a named access list may be deleted. B . They require a numbered range from 1000 to 1099. C . When created, they must be specified as standard or extended. D . They are created with the ip access-list command. E . The entire access list must be deleted before editing. F . They are applied with the ip name-group command.

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• Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）

  A . Control the amount of lube oil burned in the combustion chamber B . Transmit heat from the piston to the cylinder liner C . Prevent damage to ring groove inserts by acting as a heat dam D . Dissipate combustion chamber gas pressure by channeling it through the ring ga

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• Which of the listed statements is correct concerning the starting of centrifugal pumps?（）

  A . They should always be started with the discharge valve closed B . They should always be started with the discharge valve opened C . A priming pump is always required to flood the impeller suction D . They should always be started with the sealing line valves closed

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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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• In which of the listed refrigeration system components does superheating of the refrigerant take place?（）

  A . Expansion valve B . Evaporator C . Drier D . Receiver

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• Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）

  A . The expansion tank should be topped off B . The thermostatic water regulating valves should be manually opened C . The fuel filters should be changed D . The engine should be turned over slowly with the indicator cocks ope

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• Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）

  A . Electric B . Hydraulic C . Air D . All of the above

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• To shut down a diesel engine after it exceeds the set maximum speed，which type of device listed should be used?（）

  A . Speed limiting governor B . Over-speed governor C . Over-speed trip D . Over-speed relay

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• Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）

  A . Sludge B . Gasoline C . Fuel oil D . Lube oil

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• Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）

  A . Exhaust and scavenging B . Scavenging and compression C . Ignition and expansion D . Exhaust and compressio

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• Which of the following statements is true concerning the cetane number of diesel fuel?（）

  A . The cetane number affects the amount of injection lag B . The cetane number is an indication of the fuels viscosity C . Ignition lag is reduced with fuels having a high cetane number D . The cetane number is of little significance in the combustion proce

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• Which of the devices listed is common to all types of pumps?（）

  A . A power end and fluid end B . A propeller and educator C . A volute and impeller D . A turbine and pisto

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• Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil？ .

  A.Water discharging from the water outlet of the lube oil purifier B.Fuel oil discharging from the water outlet of the lube oil purifier C.Lube oil discharging from the water outlet of the lube oil purifier D.A change in the lube oil viscosity

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