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单选题
923、螺旋桨调速器是通过螺旋桨轮毂上的螺距改变机构,通过增加或减少螺旋桨的螺距来调节发动机或螺旋桨转速的装置
A
Propeller governor is through the propeller hub of the propeller pitch changing machine, adjusts the speed of the propeller or engine by increasing or decreasing the propeller gap.
B
Propeller governor is a device that adjusts the speed of the engine or propeller by increasing or decreasing the clearance of the propeller through the clearance changing4mechanism/on the propeller hub
C
Propeller governor is the device that regulates the rpm of the engine or propeller by increasing or decreasing the propeller pitch, through a pitch change mechanism in the propeller hub.
答案解析
正确答案：C
解析：
解析:machine 机械装置; device 装置:。propeller pitch 桨距; propeller hub 桨毂。gap=clearance 间隙。选项 A 中”the propeller hub of the propeller pitch…桨距上的桨毂…”与题干中”桨毂上的桨距…”相反,排除。
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