When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.

Which portable fire extinguisher is normally recharged in a shore facility?（）

Which fire extinguishing agent can NOT be used on an ethylenediamine?（）

When water is used to fight a fire on board a ship，the effect of the weight of the water must be taken into account. How much sea water will increase the weight displacement by one ton?（）

When must a dry chemical fire extinguisher be recharged?（）

When possible，what should be the FIRST step in combating a fire on deck resulting from a cargo overflow or a leaking cargo line?（）

When loading or discharging dry mud or cement，crew members should use facial respirator masks and（）.

When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.

Where would you find the FCC authorization for transmitting on your ship’s EPIRB?（）

Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.