單項(xiàng)選擇題

In cleaning up an oil spill, the use of chemical agents would （）.

A.absorb the oil for easy removal
B.remove the oil from the water
C.disperse or dissolve the oil in the water
D.not affect the oil

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單項(xiàng)選擇題

Why is it necessary to warn engine room personnel before activating the fixed CO₂ system?（）

A.To make them aware there is a fire
B.To let them know they should leave the engine room
C.To prevent possible injury from frostbite
D.To make them aware that ventilation will automatically stop

單項(xiàng)選擇題

The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.

A.boiling point
B.flash point
C.viscosity point
D.toxic point

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In cleaning up an oil spill, the use of chemical agents would （）.

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Why is it necessary to warn engine room personnel before activating the fixed CO2 system?（）

The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.

Why is it necessary to warn engine room personnel before activating the fixed CO₂ system?（）