An auxiliary diesel engine may fail to start due to（）

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• Auxiliary diesel engines can be automatically shut down as a result of （）

  A . low lube oil temperature B . low lube oil pressure C . high exhaust temperature D . high cooling water pressure

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• An indication of a diesel engine air intake being partially clogged, is （）.

  A . low firing pressure and low exhaust temperatures B . low firing pressure and normal exhaust temperatures C . high firing pressure and low exhaust temperatures D . high firing pressure and high exhaust temperature

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• If the turbocharger failed on an auxiliary diesel engine, which of the following conditions would probably occur?（）

  A . Full power cannot be developed B . The exhaust will contain black smoke C . Complete combustion will be impossible D . All of the above

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• In an auxiliary diesel engine, the reason for knurling the piston skirt is to（）

  A . improve skirt lubrication B . allow for expansion C . transmit forces evenly D . improve the piston seal

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• If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）

  A . a glazed surface on the spring B . nicks in the protective coating C . a build up of sludge deposits D . cracks in the surface of the spring

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• An electric heater built into some smaller diesel engines is used to （）.

  A . raise lube oil viscosity for easier starting in cold weather B . increase air inlet temperature C . increase compression ratio D . increase jacket water temperature for easier starting in cold weather

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• Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）

  A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

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• If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）

  A . check the air filter for obstruction B . check for an exhaust leak C . check the exhaust temperature D . secure the engine

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• A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）

  A . ignition lag B . engine horsepower C . lube oil system pressure D . specific fuel consumptio

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• An auxiliary reservoir for starting auxiliary engines should be kept at （）.

  A . low pressure at all times B . full pressure at all times C . low pressure at intermittence D . full pressure at intermittence

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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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• 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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• Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.

  A . open the bypass line B . cut in the lube oil cooler C . pressurize the lube oil system D . top off the expansion tank

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• An over-speed trip stops a diesel engine when the engine （）

  A . runs out of fuel B . has low lubricating oil pressure C . exceeds a set maximum speed D . has high cooling water temperature

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• When using a fuel with a higher than normal sulfur content in an auxiliary diesel engine, you should（）

  A . maintain higher than normal jacket water temperature B . change the lube oil more frequently than normal C . maintain a higher air-box temperature than normal D . maintain a higher air-box pressure than normal

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• Worn main bearing will cause the compression ratio of an auxiliary diesel engine to（）

  A . increase B . decrease C . remain the same D . increase on compression decrease on expansio

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• Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）

  A . later and close sooner B . sooner and close later C . sooner and close sooner D . later and close later

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• If an auxiliary diesel engine frequently stalls, the trouble may be caused by （）

  A . low exhaust back pressure B . air in the fuel system C . gasket blow-by or leakage D . incorrect assembly of idler spring

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• A turbocharged diesel engine will have an intake manifold pressure（）

  A . constantly decreasing as engine load increase B . constantly increasing as the amount of supercharging increases C . approximately equal to exhaust manifold pressure at all times D . approximately equal to atmospheric pressure at all time

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• Overspeed of the diesel engine driving an electric generator could cause（）.

  A . low voltage trip B . reverse power trip C . damage to windings D . excessive exhaust temperature

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• If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an （）

  A . cavitation erosion in the water jackets B . excess corrosion inhibitor in the coolant C . dirty jacket water cooler D . defective turbocharger

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• The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.

  A . two-stroke B . four-stoke C . long-stroke D . short-stroke

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• An electrically driven automatically operating auxiliary blower is provided for slow speed and （） of a low speed diesel engine.

  A . manoeuvring operations B . bad combustion C . cooling D . mooring trial

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