The quadrantal spheres are used to().
- Aremove deviation on the intercardinal headings
- Bremove deviation on the cardinal compass headings
- Cremove heeling error
- Dcompensate for induced magnetism in vertical soft iro
The quadrantal spheres are used to().
1、Oil water separators are used to ensur
Oil water separators are used to ensure that ships don’t discharge oil when () bilge water.Ato pump offBbeing pumpedCpumping outDit pumping out
2、The exhaust boilers are used to recove
The exhaust boilers are used to recover some of () carried in the exhaust gas from the main engine.AwaterBoilCheatDsteam
3、Flame screens are used to().
Flame screens are used to().Acontain flammable fumesBprotect firefighters from flamesCprevent flames from entering tanksDkeep flames and sparks from getting out of an engine's exhaust system
4、Logbooks are used to record the events
Logbooks are used to record the events occurring when().Athe ship is in a harborBthe ship is at anchorageCthe ship is underwayDall of the above
5、() are used to limit the pressure in a
() are used to limit the pressure in any particular portion and mainly control the pressure after the valve.ARelief valvesBCheck valvesCSafety valvesDReducing valve
6、()are used to digest the sewage to pro
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.Aanaerobic bacteriaBaerobic bacteriaCair bubblesDdisinfection chemical