单项选择题
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
相关考题
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单项选择题
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 -
单项选择题
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 -
单项选择题
If anything abnormal be found on the load change of main engine when the ship is entering in shallow waterway, before taking measuring the engineer on duty should （）
A.stop main engine immediately
B.ask the captain and the chief engineer’s permission for stopping the engine
C.initiatively inquire the bridge for the situation
D.stop engine and inform bridge
