A、a break-glass and pull-cable system
B、electrical controls on the bridge
C、a mechanical arm outside the vent duct
D、the heat of a fire melting the link
更多“Fusible-link fire dampers are operated by（）.”相关的问题
A、8the heat of a fire melting the link B、a break-glass and pull-cable system C、electrical controls on the bridge D、a mechanical arm outside the vent duct
A、Fusible links must be replaced if a damper is activated B、Fusible links are tested by applying a source of heat to them C、Fusible links must be replaced at every inspection for certification D、A fusible link will automatically open after a fire is extinguished and reset the damper
A、A fusible link will automatically open after a fire is extinguished and reset the damper B、Fusible links must be replaced at every inspection for certification C、Fusible links are tested by applying a source of heat to them D、Fusible links must be replaced if a damper is activated
A、remote operated valve B、fusible link C、CO2 system pressure switch D、heat or smoke detector
A、remotely operated valves B、fusible links C、C02 system pressure switches D、heat or smoke detectors
A、Electrical cut off switch B、A fusible link C、Manual cut off switch D、A water spray actuator
A、provide a means of draining the boiler B、warn the engineer of low water level C、cool the crown sheet at high firing rates D、open the burners electrical firing circuits
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