单项选择题

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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单项选择题

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

单项选择题

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

单项选择题

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

The fire extinguishing action of CO2 comes mostly from （）.

相关考题

The fire extinguishing action of CO₂ comes mostly from （）.