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单选题
The process of supplying a diesel engine cylinder with air at a pressure greater than atmospheric is called（）.
A
engine displacement
B
super-aspirating
C
air injection
D
supercharging
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单选题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 intakesB
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单选题In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）A
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valve bridgeC
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单选题The purpose of compressing the air within the cylinder of a diesel engine is to （）A
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decrease injection lagC
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单选题If a four-stroke/cycle diesel engine is started by injecting air into the cylinder, the pistons receiving the charge of starting air must be（）A
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单选题Before engaging the turning gear and turning the diesel engine, which of the following operation should be done except（）A
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单选题The highest pressure in a diesel engine cylinder normally occurs （）.A
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after TDCD
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单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）A
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