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20 Cards in this Set
- Front
- Back
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A gaseous nitrogen charge is added to a liquid fire extinguishing agent in order to:
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Expel agent from bottle.
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What component holds both a liquid agent and a nitrogen agent in a liquid-agent fire extinguisher container?
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frangible disc
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In a liquid-agent fire extinguisher container, why is the frangible disc undercut into shaped sections?
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To break cleanly into large pieces.
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What is the purpose of a time delay relay that is used on some liquid-agent fire extinguishing systems?
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To position valves.
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BANK no. 2 in a two-shot liquid-agent fire extinguishing system failed to discharge, while BANK no. 1 discharged normally. The MOST probably cause of this malfunction is what type of faulty switch?
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Time delay relay
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When depressed, which switch on a T-handle fire extinguishing system completes the circuit to the squib?
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Agent discharge switch.
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In the T-handle fire extinquishing system, the two-way check valve is pushed into position by the..
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Liquid agent.
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In a T-handle liquid-agent fire extinguishing system, what happens when the container pressure becomes too low?
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A pressure switch closes.
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Air that is trapped in a coolant system has what effect?
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Reduces the cooling capability of the coolant.
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During initial start of a liquid coolant system, the controller timer energizes the solenoid shutoff valve closed for 3 minutes. The purpose of this action is to..
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allow for system stabilization.
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What component ofa liquid coolant system is positioned by the temperature of the coolant?
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Thermal pilot valve.
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In a liquid coolant system, what tells you that the liquid coolant filter is dirty?
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A mechanical pop-up indicator is activated.
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When maintaining a liquid coolant system, over-torquing clamps may cause what to happen?
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Damage or failure of teh component.
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IN a liquid coolant system, what is the purpose of purging the servicing unit supply hose?
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Remove contaminants from the system.
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To ensure that a multiplace liferaft will inflate in extremely low temperatures, the inflation cylinder has a charge of...
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Nitrogen.
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What component of a liferaft inflation cylinder assembly keeps carbon dioxide (CO2) within the cylinder and permits an unrestricted flow of CO2 to the liferaft?
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Discharge valve.
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Releasing carbon dioxide (CO2)from a liferaft cylinderinto a liferaft is normally done by activating the..
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cam.
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What action do you take if you find corrosion on the inside of a liferaft inflation cylinder?
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Tag the cylinder for overhaul.
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Liferaft inflation cylinders having an outside diameter of less than 2inches and a length of less than 2 feet do NOT require..
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Hydrostatic testing.
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After recharging a liferaft inflation cylinder-but before returning it to serviceable status-what do you do to the cylinder?
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Test for leaks, then reweigh after 48 hours.
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