單項選擇題

In the navigation（） cause the shafting over load easily.

A.the stopping engine suddenly
B.the sailing astern and changing direction suddenly
C.the sailing from the shallow water area to the deep water area
D.the ship’s trim too much

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單項選擇題

When the vessel on the full speed ahead, if full astern immediately （） the main engine start astern and fuel injection.

A.after the thrust power is zero
B.after the torsion is zero
C.surpass the critical point on the water turbo phase
D.after the speed is zero

單項選擇題

According to the Robinson Graph, suddenly astern maneuvering of main engine during navigating will cause（）

A.rapid reduction of ship’s friction force
B.shaft system over mechanical load
C.sharp growth of the torque of diesel engine
D.propeller torque change along J=0 curve