Most propellers on merchant vessels ar

1、Aboard damaged vessels，the MOST import

Aboard damaged vessels，the MOST important consideration is preserving（）.Abilge pumping capacityBreserve buoyancyClevel attitudeDinstability

2、Fire detecting systems on merchant ves

Fire detecting systems on merchant vessels may be arranged to sense （）.AsmokeBrate of temperature riseCionized particlesDall of the above

3、In most cases，when a large merchant ve

In most cases，when a large merchant vessel enters shallow water at high speed the（）.Amaneuverability will increaseBspeed will increaseCbow will squat farther than the sternDvessel will rise slightly，on a level plane

4、The（）has a built-in world map; most ar

The（）has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm.AchartplotterBC-MAP NTCC-CardsDPPI

5、The propeller is pushed on to the tube

The propeller is pushed on to the tubeshaft taper and made tight by（）Aa mechanical sealBkeyway and keyCa nutDshrinkage

6、A vessel is equipped with twin propell

A vessel is equipped with twin propellers，both turning outboard with the engines half ahead. If there is no wind or current and the rudders ...