单项选择题
A.The domestic water B.Bilge water C.Oil transfer D.The ballast
（） connected to the moving tiller will bring the floati...
单项选择题（） connected to the moving tiller will bring the floating lever pivot and the lever into line at right angles to the screw shaft axis.
A.A cut-off lever B.A swivel block C.A cross-head D.A driving gear
Two rams of the hydraulic gear are linked at their oute...
单项选择题Two rams of the hydraulic gear are linked at their outer ends to （） by a crosshead and swivel block.
A.the piston rod B.the tiller arm C.the connecting rod D.the rudder
Excessively warm water leaving condenser may be caused ...
单项选择题Excessively warm water leaving condenser may be caused by（）
A.fouled tubes in shell and tube condenser B.too little or too warm condenser water C.air or non-condensable gas in system D.overcharge of refrigerant
