A.vapor to oxygen
B.the flammable limit concentration
C.the autoignition concentration
D.the lower explosive limit concentration
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A.fuel oil
B.wood
C.celluloid
D.electrical insulation
A.preventing oxygen from reaching the burning material
B.cooling the burning material below its ignition temperature
C.using the extinguishing agent to make the burning material fire-resistant
D.using the extinguishing agent to absorb the heat
A.the mimimum fire extinguishing equipment，lifejackets，survival and rescue craft she must carry
B.the name of the managing operator
C.any special conditions or restrictions on her operation
D.All the above
A.pressure release
B.backfire flame arrestor
C.automatic shut off
D.flow valve
A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection
最新試題
On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.
A fire in electrical equipment should be extinguished by using（）.
Automatic fire dampers in ventilation systems are operated by use of（）.
If，during helicopter refueling operations，fuel is spilled on clothing，the person should first（）.
Before a tank is to be crude oil washed，the oxygen content in the tank must be measured at a position（）.
Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.
Backfire flame arrestors are installed on（）.
During the required periodic abandon ship drill aboard a ship，each person not assigned duties in the muster list is（）.
A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots. You should（）.
Combustible gas indicators measure the presence of combustible gas as a percentage of the（）.