Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）
1、Buoys which only mark the left or righ
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）AFlashingBQuick flashingCComposite group flashingDEqual interval (isophase)
2、With （）, the corrosion problems are mu
With （）, the corrosion problems are much reduced in a central cooling system.Ano equipment in contact with sea waterBless equipment in contact with fresh waterCmore equipment in contact with sea waterDless equipment in contact with sea water
3、Life preservers must be marked with th
Life preservers must be marked with the（）.Astowage space assignedBvessel's nameCvessel's home portDmaximum weight allowed
4、How many life buoys（）on board with sel
How many life buoys（）on board with self-igniting light?Athere existBthere isCthere areDare there
5、A cargo hose is marked with the（）.
A cargo hose is marked with the（）.Amaximum working pressureBbursting pressureCsafety relief valve settingDmaximum temperature
6、Safety shackles are fitted with（）.
Safety shackles are fitted with（）.Aa threaded boltBa round pin，with a cotter pinCa threaded bolt，locknuts，and cotter pinsDround pins and locknut