单项选择题

In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （）

A.injection lag
B.ignition delay
C.compression
D.turbulence lag

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单项选择题

Fuel is ignited in a diesel engine cylinder by （）

A.a spark plug
B.injectors
C.the heat of compression
D.increasing jacket water temperatures

单项选择题

Vessels having main engines arranged for air starting are to be provided with at least （）

A.one automatic drain serving both containers
B.two air starting containers of approximately equal size
C.one control air container and one starting air container
D.one additional means of starting the main engine

单项选择题

Injectors for use with heavy fuel oil must be cooled by either water or light oil to （）

A.prevent heat corrosion to internal components
B.increase fuel delivery rate and economy
C.prevent pre-ignition
D.avoid carbonization of the nozzle tips