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

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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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• Small crack in the crankshaft bearing surface of a diesel engine are an indication of（）

  A . corrosion fretting B . insufficient lubrication C . abnormal wear D . fatigue failure

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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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• A substantial increase in crankcase pressure could be an indication of （）

  A . excessive lube oil pressure B . the proper seating of new rings C . a worn cylinder liner D . a malfunctioning cylinder relief valve

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• The cetane rating of diesel fuel is an indication of the（）

  A . ignition quality of the fuel B . calorific value of the fuel C . flash point of the fuel D . rate of fuel consumptio

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• In a diesel engine cooling water system, a pH of 60 indicates a/an （）.

  A . slightly acidic condition B . slightly alkaline condition C . overtreatment of water D . neutral condition of water

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• A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）

  A . worn valve seats B . worn main bearing C . excessive valve clearance D . weak rocker arm spring

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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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• 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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• Water accumulation in the cylinder of a secured engine is an indication that the （）

  A . soft water pump was not secured along with the engine B . jacket water thermostat has failed C . cylinder liner may be cracked D . raw water pump is over-speeding just prior to engine shutdow

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• On a turbo-charged, medium-speed diesel engine, which of the following problems is an indication of a restricted air intake passage?（）

  A . Engine is hard to start B . Engine misses C . Surges at governed RPM D . Coolant temperature is too low

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• What is the best indication of the loading of a diesel engine?（）

  A . Oil temperature B . Manifold pressure C . Exhaust gas temperature D . Fuel consumptio

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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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• 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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• Distortion of the spray pattern of a nozzle or injector may be indicated by a/an（）

  A . high firing pressure B . overload of that particular cylinder C . smoky exhaust D . cooling water temperature rise

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• The cetane number of a diesel fuel oil indicates its（）

  A . Viscosity B . acid content C . heating value D . ignition quality

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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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• A knocking sound from one cylinder of an operating air compressor indicates （）.

  A . a defective or broken high pressure un-loader B . a loose valve plate C . excessive overload D . no compressio

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• A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）

  A . combustion gas blow-by B . excessive lubrication C . properly functioning rings D . insufficient cylinder cooling

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• An increase in load on a diesel engine results in （） of speed of the crankshaft.

  A . a reduction B . an increase C . an outing D . a downward

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• Sparking at the brushes of a running motor could be an indication of （）.

  A . normal operation B . a dirty commutator C . increased brush capacity D . water vapor absorptio

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• A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）

  A . loss of additives from the lube oil B . carbon deposits in the lube oil C . excessive centrifuging D . excessive fuel dilutio

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• Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）

  A . To test the starting system B . To remove air bubbles from the jacket water C . To ensure that the lube oil system delivers pressure D . To ensure foreign material (water etc) is not present in the cylinder

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• A quick and rapid motion of a ship in a seaway is an indication of a(n) （）.

  A . large GM B . high center of gravity C . excessive free surface D . small GZ

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