When ship navigating in rough sea, the...

单项选择题When ship navigating in rough sea, the correct operation is （）

A.navigating with a low diesel engine speed
B.navigating with a stable diesel engine speed
C.increasing the efficiency of propeller
D.increasing fuel injection

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1.单项选择题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）

A.prevent the diesel engine surging
B.prevent governor from being damaged because of swing
C.reduce the probability of the crank shaft being torsional vibrated and resonated
D.prevent the main engine being overload or overspeed

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2.单项选择题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.单项选择题When a ship is entering to shallow water, ship resistance will be increased and the speed of main engine reduced.Due to the function of the governor, the main engine will（）

A.reduce fuel feeding
B.increase fuel feeding
C.keep original fuel feeding
D.be overspeed

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4.单项选择题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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5.单项选择题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

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6.单项选择题If keep the fuel injection of main engine unchanged when ship is fouled, that will causeⅠ.The speed of main engine to be reduced Ⅱ.Ship speed to be reduced Ⅲ.The resistance torque of propeller to be increased Ⅳ.Trim at stern to increase（）

A.Ⅰ + Ⅱ
B.Ⅰ ~ Ⅲ
C.Ⅰ ~ Ⅳ
D.Ⅰ + Ⅱ + Ⅳ

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7.单项选择题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

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8.单项选择题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

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9.单项选择题The fire of burning plastics is classified as （） fire.

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

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10.单项选择题The pistons are cooled by （） oil from the forced lubrication.

A.being given
B.giving
C.supplying
D.being supplied

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