Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate（）

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• In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）

  A . noise coming from that air starting valve B . continuous operation of the starting air compressor C . zero air pressure in the air starting system D . overheated starting air pipe to the cylinder head

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• During which condition should the operator of a pedestal crane shutdown operations?（）

  A . Bunkering B . High winds C . Potable water spill on deck

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• The exhaust gases for a new engine should be （） when the engine operates under full load.

  A . smoky B . a little bit dense C . visible D . almost invisible

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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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• In describing engine operation, what does the term “cycle” mean?（）

  A . The sequence of events that produce a power pulse B . One rotation of the engine crankshaft C . One stroke of a piston D . All of the above

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• （） is a precaution which contributes to avoiding trouble under normal operating conditions.

  A . Constant inspection B . Keeping constant load C . Remaining constant temperature D . Varying speed

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• White smoke exhausting from an operating diesel engine may indicate （）.

  A . a cracked liner B . burning lube oil C . an overloaded engine D . insufficient combustion air

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• 运行限值和条件 operating limits and conditions

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• What condition will result in the automatic shutdown of a diesel engine? （）

  A . High jacket water pressure B . High lube oil pressure C . Low lube oil pressure D . Excessive turbo charger speed

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

  A . Intake manifold B . Water-cooled exhaust system C . After-cooler D . Exhaust diffuser

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• The diesel engine valve subjected to most severe conditions of service is the （）.

  A . cylinder exhaust valve B . air starting valve C . air inlet valve D . cylinder relief valve

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• Operating conditions in the crank chamber are very （） those in the cylinder.

  A . the same as B . similar to C . separated from D . different from

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• Under manoeuvring condition the main engine may run on （）.

  A . gas oil B . marine diesel oil C . residue oil D . crude oil

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• Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.

  A . first stage B . second stage C . distillate cooler D . salt water feed heater

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• The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.

  A . to a great extent B . on a great extent C . on mainly D . on only

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• A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST （）.

  A . reduce the engine load B . increase the cooling water flow C . increase the lube oil pressure D . adjust the fuel rack

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• Which conditions will normally cause a SART to operate in the active mode?（）

  A . It will respond only to interrogation by 9-Ghz radar signals B . A SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters high C . A SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical miles D . All of the above

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• A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.

  A . slight acidity B . slight alkalinity C . excessive alkalinity D . excessive acidity

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• Proper operation of the main engine reduction gear set requires the operation to monitor （）

  A . the sump oil level B . oil flow sight glasses C . bearing temperatures D . all of the above

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• A four-stroke cycle, turbocharged, 1000 horsepower diesel engine has been operating under loadThe load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperatureIn response to this condition, you should:（）

  A . reduce load B . check your exhaust C . adjust cooling water temperature D . increase lube oil flow

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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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