单项选择题
A.The expansion tank should be topped off
B.The thermostatic water regulating valves should be manually opened
C.The fuel filters should be changed
D.The engine should be turned over slowly with the indicator cocks open
单项选择题 The order “（） ” means “Maximum maneuvering engine revolution for ahead propulsion”.
单项选择题 Winch gears must be maintained in proper alignment to prevent （）.
单项选择题 You are unable to pump out the aft starboard engine room bilge well that is fouled, with one foot of water over the top of the bilge well, what actionshould be carried out?（）