Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）<br>A:The reservoir would become vapor bound<br>B:The valve would be placed in hydraulic lock<br>C:The spring loaded relief ports would open<br>D:The buffering chambers would be unable to function

Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）
A:The reservoir would become vapor bound
B:The valve would be placed in hydraulic lock
C:The spring loaded relief ports would open
D:The buffering chambers would be unable to function

出自：海船船员证

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