单项选择题

The most common diesel engine fuel system problems are caused by （）.

A.incorrect adjustments
B.dirty fuel
C.broken fuel lines
D.excessive vibration

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单项选择题

The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）

A.quantity of air it takes in and retains in the cylinders during a given time period
B.proportion of trapped air that is utilized in the combustion process
C.thermodynamic efficiency of the engine cycle
D.all of the above

单项选择题

Dirt in a fuel oil system of a diesel engine can cause （）

A.damage to strainers
B.over-speeding of the engine
C.excessive cooling of the engine
D.injector damage

单项选择题

While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）

A.Manually trip the over-speed device
B.Interrupt the fuel flow to the engine
C.Disengage the safety interlock
D.Slide the camshaft to the neutral position