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

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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

單項選擇題

While a ship with twin screw is making a turn, in order to prevent overload, the duty engineer should （）

A.reduce the fuel feeding of main engine of inner propeller
B.reduce the fuel feeding of main engine of outer propeller
C.firstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propeller
D.reduce fuel feeding of two engines at the same time