A dark exhaust from a running diesel e...

单项选择题A dark exhaust from a running diesel engine can be caused by （）

A.late ignition
B.water in the fuel
C.high compression temperature
D.starting valve stuck open

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1.单项选择题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）

A.White
B.Black
C.Blue
D.Clear

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2.单项选择题Combustion knock will most likely occur as a result of using a fuel with（）

A.low ignition quality
B.a high volatility
C.low ignition delay
D.a high cetane number

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3.单项选择题High exhaust temperatures from all of cylinder of a turbocharged, four-stroke/cycle diesel engine can be caused by an（）

A.inoperative turbocharger
B.inadequate fuel supply
C.overload on one cylinder
D.unequal load distribution

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4.单项选择题One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the （）

A.governor sensitivity
B.exhaust temperature
C.fuel injection pressure
D.speed of the can shaft

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5.单项选择题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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6.单项选择题A diesel engine fails to start due to excessive water in the fuelBefore the engine can be started, the water should be removed from the（）

A.fuel lines
B.lube oil filter
C.crank case pump
D.rocker arm reservoir

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7.单项选择题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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8.单项选择题As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?（）

A.Compression ratio
B.Fuel/Air ratio
C.Compression pressure
D.Lube oil pressure

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9.单项选择题Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）

A.test the starting system
B.remove condensation from the cylinders
C.check the compression
D.check for proper lube oil pressure

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10.单项选择题In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）

A.turn the flywheel
B.reduce friction
C.overcome inertia
D.ignite the fuel

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