Distilled water from an evaporator may be discharged into a potable water tank （）.
1、Water fog from an all-purpose nozzle m
Water fog from an all-purpose nozzle may be used to（）.Afight an electrical fireBfight a magnesium fireCeliminate smoke from a compartmentDAll of the above
2、To（）sanitary water from any vessel，an
To（）sanitary water from any vessel，an application shall be made to Harbor Authorities for approval.AdischargeBrecircleCloadDtake i
3、The distance from the still water leve
The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.Aair gapBfreeboardCpenetrationDwater depth
4、Cracks may be prevented from developin
Cracks may be prevented from developing at the corners of welded plating inserts by（）.Asquaring the cornersBrounding the cornersCplug welding the cornersDslot welding the corner
5、When（）clean ballast water from any ves
When（）clean ballast water from any vessel，an application shall be made to Harbor Authorities for approval.AdischargingBrecirclingCloadingDtaking i
6、The valve that prevents water from bac
The valve that prevents water from backing out of the boiler into the feed line is the（）.Abottom-blow valveBskin valveCfeed-check valveDfeed-stop valve