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
单项选择题 Exhaust pyrometer readings provide an indication of the （）
单项选择题 Fuel oil discharged to the diesel engine cylinder is atomized at the （）
单项选择题 Cavitation erosion in the cooling water system of a diesel engine usually occurs at the pump impeller, and on the waterside of the （）
