单选题 1分

The separating effect of oil separator is not very good, the reason may be _____ 。

  • A. too little seal water
  • B. improper gravity disc
  • C. oil discharging pump not working very well
  • D. low water level of the working water

你可能感兴趣的试题

1 单选题 1分
  • A.insufficient fuel delivery through that nozzle
  • B.fuel leakage into the nozzle drain line
  • C.fuel leakage before and after injection
  • D.erosion and cratering of the nozzle orifices
3 单选题 1分
  • A.there are separate switches for the motor and the control
  • B.the contactors and relays are mounted on a non-conducting panel
  • C.the resistor banks are composed of individual series-connected units
  • D.the auxiliary contacts have a high resistance connection
5 单选题 1分
  • A. the system is manned manually
  • B. the system is controlled automatically
  • C. the system is situated remotely from the operator
  • D. all the above