Most hydraulic steering gears are fitted with relief valves which（）<br>A:function when the rudder is amidships<br>B:relieve excess whip pressure from the hydraulic oil system<br>C:protect the piping assembly from external rudder shock<br>D:relieve excessive telemotor pressure

Most hydraulic steering gears are fitted with relief valves which（）
A:function when the rudder is amidships
B:relieve excess whip pressure from the hydraulic oil system
C:protect the piping assembly from external rudder shock
D:relieve excessive telemotor pressure

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245403】个 (题库试题定时更新)