正确答案: A

-10

题目：液压装置油温在( )℃以下，不允许启动。

解析：A

查看原题

举一反三的答案和解析：

[单选题]第二组：Magnetic pickup (MPU) sensors are devices which can be used in conjunction with electronic control modules for monitoring of parameters such as speed, direction of rotation and a variety of alarm conditions. MPU sensors are available in various sizes and types. Following are some guidelines for their selection on industrial engines. MPUs are located near a flywheel, camshaft or other type of gear with rotation relative to engine speed. The passing of the gear teeth through the MPU tip (pole) generates a voltage and frequency. This frequency is converted to a speed reference by a control module. It should be noted here that most MPUs will develop similar signals. However, the magnitude and strength of the signal is dependent on the size of the sensor in relation to the gear teeth, the clearance between the pole piece and the gear teeth, and various other factors. As a general rule of thumb, the following standards should be met:①Dimension of tooth top surface should be equal to or more than the pole piece diameter.

①②③

[单选题]环槽磨损后依具体情况不同可分别采用______等方法进行修复。Ⅰ.修理尺寸法；Ⅱ.光车＋镀铁；Ⅲ.恢复尺寸法；Ⅳ.换新活塞；Ⅴ.光车＋镀铬。

Ⅰ＋Ⅲ

[单选题]应及早采取行动，以避免紧迫局面的形成是________。

让路船的责任

[单选题]下述关于WoodwardPGA调速器结构特点中错误的是( )。

稳定性调节机构是用来调节补偿针阀开度与反馈指针刻度