A.releasing the boiler waterB.the explosion detecting a……

单项选择题When the dock is refilled with water after docking repair, the first work which should be done by engineers is （）

A.igniting boiler
B.releasing air in sea water system
C.starting generator
D.cut off shore power

单项选择题During the deck repair,（） should be measured firstly before tail shaft is drawn out.

A.the sinking of tail shaft
B.the clearance of stern bearing
C.the total flexure of both end bearing
D.main engine crankshaft deflection

单项选择题To ensure the quality of dock repair, C E should know very well （）

A.the repair standard of main docking repair item
B.the special tool for repair item
C.the skill of repairer
D.the status of docking repair equipment

单项选择题Which of the following items don’t belong to dock repair works?（）

A.making the repair list, booking spare parts and special tools for the dock repair
B.shutting off all of the SW valves to outboard
C.the sketches or diagrams used for the dock repair
D.cleaning up the oil tank and boiler before enter the dock

单项选择题Which of the following items don’t belong to dock repair works?（）

A.the SW outboard valves
B.the tailshaft LO stop valve
C.the drain valve of the boiler
D.propeller shaft sealing device