单项选择题

A change in engine speed is required before a governor is able to make a corrective movement of fuel rackThis aspect of governing is commonly expressed as a percent and is known as （）

A.governor sensitivity
B.governor promptness
C.speed droop
D.isochronous governing

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Exhaust pyrometer readings provide an indication of the （）

A.effectiveness of water-cooled exhaust elbows
B.distribution of the load between engine cylinders
C.amount of fuel penetration into the engine cylinders
D.indicated horsepower of the engine cylinders

单项选择题

Fuel oil discharged to the diesel engine cylinder is atomized at the （）

A.turbocharger
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C.carburetor
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Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the （）

A.fuel nozzle holders
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C.engine cylinder liners
D.low temperature and a low viscosity