單項(xiàng)選擇題Whether a ship is sailing before the wind or sailing in the rough sea, we must reduce the fuel injection of the main engine.For the former one, it aims to prevent the main engine being（）, while for the later one, it aims to prevent the main engine being（）.

A.overspeed；overload
B.overload；overspeed
C.over torque；overspeed
D.low mechanical efficiency；overload


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1.單項(xiàng)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

3.單項(xiàng)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

4.單項(xiàng)選擇題When ship is fouled, increasing the fuel injection for keeping the normal speed will cause the main engine （）

A.to work as overload characteristic
B.overspeed
C.over mechanical load only
D.over thermal load only

5.單項(xiàng)選擇題The fire of burning plastics is classified as （） fire.

A.Class A
B.Class B
C.Class C
D.Class D