Fire dampers prevent the fire spreadin

1、To prevent the spread of fire by conve

To prevent the spread of fire by convection you should （）.Aremove combustibiles from direct exposureBcool the bulkhead around the fireCclose all openings to the areaDshut off electrical power

2、Fusible-link fire dampers are operated

Fusible-link fire dampers are operated by（）.A8the heat of a fire melting the linkBa break-glass and pull-cable systemCelectrical controls on the bridgeDa mechanical arm outside the vent duct

3、The（）into the fire accident was carrie

The（）into the fire accident was carried out by two policemen.AquestionBdoubtCinvestigationDinformatio

4、Fire dampers prevent the spread of fir

Fire dampers prevent the spread of fire by（）.AconvectionBconductionCradiationDdirect contact

5、Fusible-link fire dampers are operated

Fusible-link fire dampers are operated by（）.Aa break-glass and pull-cable systemBelectrical controls on the bridgeCa mechanical arm outside the vent ductDthe heat of a fire melting the link

6、The spread of fire is prevented by（）.

The spread of fire is prevented by（）.Acooling surfaces adjacent to the fireBleaving combustibles in the endangered areaCincreasing the oxygen supplyDAll of the above