單項(xiàng)選擇題The fire extinguishing action of CO2 comes mostly from （）.

A.breaking the fire chemical chain reaction
B.smothering
C.cooling
D.isolating the heat from the fuel


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1.單項(xiàng)選擇題The amount of expansion space to be left in a fuel tank when fuel oil is being received, is determined by the （）.

A.quantity of fuel to be received
B.flash point of the fuel as it is received
C.fuel temperature as it is received
D.viscosity of the fuel being received

2.單項(xiàng)選擇題If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.

A.close the static leg filling valve
B.close the overflow tank falling valve
C.reduce the fuel oil pumping rate
D.stop the fuel oil pumping operation

3.單項(xiàng)選擇題After fuel tanks have been topped off, which of the listed procedures should be followed next?（）

A.The pressure-vacuum relief valve should be reset
B.The tanks should be made seaworthy to prevent contamination
C.The tanks should be sounded to make sure the levels are not rising
D.The tanks should be marked with a bull stamp on the manifold filling valve

4.單項(xiàng)選擇題The most critical part of the bunkering operations, which can result in an oil spill, is when the （）

A.hose joints are made up
B.tanks are being topped off
C.system is being lined up
D.pumping operation is first started

5.單項(xiàng)選擇題During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（）

A.Reduce the pumping rate by closing the deck filling valve
B.Close all overflow valves
C.Place 5 gallon containers under all flange connections in the fuel line
D.Reduce the pumping rate and sound tanks frequently as the level rises