单项选择题
Air trapped in the hydraulic fluid of a steering system may be indicated by（）
A.the steering pumps overspeeding B.a jammed open relief vale C.a constantly occurring improper rudder response D.excessive ram pressure
单项选择题 The purging of air from an elector-hydraulic steering gear unit is necessary when（）
单项选择题 If a severe leak develops in the electro-hydraulic steering gear unit is necessary when（）
单项选择题 A power failure in the hydraulic system of a compact type steering gear would cause the rudder to（）
