单选题 1分

Hydraulic machinery failures are commonly caused by contamination of the hydraulic fluid and_______

  • A.?????fluid friction
  • B.??????fluid turbulence
  • C.?????component misalignment
  • D.?????pressure purges

你可能感兴趣的试题

1 单选题 1分
  • A.5 volts, the output changes 10 volts
  • B.10 volts, the output changes 5 volts
  • C.2 volts, the output changes 10 volts
  • D.10 volts, the output changes 2 volts
4 单选题 1分
  • A..shut off the main starting valve
  • B. Stop the fuel oil booster pump and shut off the correspondence valves
  • C. Stop the sew water pump immediately and shut off the correspondence valves
  • D. Stop the jacket water pump immediately and shut off the correspondence valves
5 单选题 1分
  • A.circuit breakers , low
  • B.circuit breakers, high
  • C.Exciters , low
  • D.Exciters ,high