After stopping oily water separator, sea water should b

单项选择题

After stopping oily water separator, sea water should be permitted for （） minutes,（）should be closed after stopping pump to reduce oxidation corrosion of inner wall.

A.15；inlet value
B.15；inlet and outlet value
C.30；inlet value
D.30；inlet and outlet value

相关考题

单项选择题 Before the oily water separator put into operation, it should be （）

单项选择题 The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is （）

单项选择题 The pressure difference of the gauge on the oily water separator increases greatly, the reason is（）

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船舶电气与船舶安全