Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

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• A diesel engine fails to start because of water in the fuelIn order to start the engine, you should （）?

  A . turn engine with jacking gear B . drain filters and strainers and bleed off water at each injection pump C . use ether to start the engine with blow-down valves open D . blow through the cylinders and fuel lines with a drying agent

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• If the diesel engine fuel injection timing is changed to delay the start of injection until the pistons are at top dead center, the engine will（）

  A . backfire through the air intakes B . develop less power under load C . have high firing pressures D . lift its cylinder relief valve

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

  A . low exhaust back pressure B . high lube oil temperature C . insufficient cranking speed D . excessive fuel atomizatio

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• If a diesel engine fails to start，one of the likely causes is （）

  A . low compression temperature B . low ambient air pressure C . high lube oil pump pressure D . high fuel oil booster pump pressure

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• A diesel engine may fail to start due to （）

  A . low air charge temperature B . high cranking speed C . excessive fuel dilution of lube oil D . high compression pressure

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• A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）

  A . has little or no internal friction B . has a lower effective compression ratio C . operates with scavenge air under a positive pressure D . operates without energy absorbing intake and exhaust stroke

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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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• When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）

  A . starting air pressure B . scavenge air pressure C . over-speed trip D . banjo oiler line

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• When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）

  A . an obstruction in an cylinder B . water accumulation in some engine cylinders C . low starting air pressure D . low scavenge air pressure

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• A diesel engine may be hard to start if the （）

  A . air intake is restricted B . engine is cranked too fast C . vibration dampener is faulty D . exhaust back pressure is low

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• Immediately after any diesel engine is started, the engineer should check the （）

  A . crankcase pressure B . lube oil pressure C . saltwater pressure D . exhaust temperature

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• Cold weather starting of a diesel engine may be made easier by（）

  A . decreasing the compression ratio B . using a special fuel having a high ignition temperature C . increasing the starting air supply D . heating the jacket water

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• What preventative maintenance should be done frequently to diesel engine starting air receivers?（）

  A . Drain the accumulated moisture B . Test the relief valves C . Watch the temperature to prevent fluctuations in pressure D . Clean the interior to remove oil and foreign matter

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• Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）

  A . higher speed required B . flywheel-effect C . lower starting temperatures D . higher compression pressure

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• The following preparations are essential for any （） of marine diesel engine before it may be started.

  A . doing B . make C . turn D . operating

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• Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

  A . cooling water B . compressing air C . compressed air D . cylinder oil

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• Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）

  A . increase in starting air pressure B . increase in lube oil viscosity C . compression expansion device D . jacket water heater

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• The timing of diesel engine air starting valves is controlled by（）

  A . the air start valve timing gears and rods B . a cylinder check valve C . individual cams and valve gear D . an air manifold poppet valve

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• Diesel engine air start system check valves are opened by （）

  A . an air start cam B . cylinder compression pressure C . starting air pressure D . valve spring

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• If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the （）.

  A . compression pressures are below normal B . lube oil is diluted with fuel oil C . cranking speed is too low D . exhaust system is partially restricted

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• Before starting a diesel engine, you should always（）

  A . check the pyrometer readings B . check the crankcase oil level C . check the fuel oil strainers D . clean the fuel system

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• The main purpose of starting the diesel engine on air briefly is（）

  A . to inspect if the cylinder has the water leakage B . to expel out the residual water/gas/oil from the cylinder C . to check if fuel supply is normal D . A and B

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• Diesel engine air start valve timing is controlled by（）

  A . engine operating speed B . an air manifold C . a hydraulic distributor D . individual cams and valve gear

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• Which of the following should always be checked prior to starting a diesel engine?（）

  A . Air filters B . Fuel oil strainers C . Crank case oil level D . Pyrometer reading

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