超星 - Basics of hydraulic valves

判断题

A4/3directionalcontrolvalvehasfourworkpositionsandthreeconnectingports.

A. 对
B. 错

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判断题

Adirectionalcontrolvalvecontrolsflowdirectionbyblockingorconnectingitsportsinternally

A. 对
B. 错

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单选题

Whatdoesthenumber“4/2”onadirectionalcontrolvalvemean?

A. 4positionsand2ways
B. 4positionsand2ports
C. 4waysand2positions
D. noneoftheabove

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单选题

Whichdescriptionmatchesthevalvesymbol?

A. Normallyclosed,4-way,2-position,hydraulicallyactuated
B. Normallyclosed,2-way,2-position,solenoidactuated
C. Normallyopen, 4-way,2-position,solenoidactuated
D. Normallyopen,2-way,2-position,hydraulicallyactuated

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