單項選擇題When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?（）

A.the power of main engine will be reduced
B.exhaust temperature will be increased
C.the speed of the ship will be reduced
D.the propulsion characteristic of propeller will keep unchanged


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3.單項選擇題While sailing under normal weather and sea condition, the basic parameter which is used to restrict the fuel injection of main engine is （）

A.power of main engine
B.turbine rotation speed
C.speed of main engine
D.exhaust temperature

5.單項選擇題When a ship is fully loaded, it needs to prevent the main engine to be（）.While a ship is fully empty, it needs to prevent the main engine to be（）.

A.overspeed；overload
B.overload；overspeed
C.over mechanical load；over thermal load
D.over torque；overspeed