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powerplant > I > Flashcards

I Flashcards

1
Q

Name at least two types of fire detector systems used for engine, fire protection

A

Overheat, rate of temperature rise, and flame detectors

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2
Q

What will happen in a thermocouple fire warning system on an engine that overheats slowly?

A

Nothing it takes a fast rate of rise or rapid heating to operate

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3
Q

what happens to a thermal switch fire potential system when it is heated. Enough to operate.

A

Switch contacts close and provide ground for the cockpit fire warning device

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4
Q

what is the minimum number of thermal switch units needed for a thermal switch? Fire protection system

A

At least one

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5
Q

what electrical power is needed for a thermal cup of fire protection system

A

Aircraft, electrical system, and thermocouple produced voltage

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6
Q

what is a type of fire detection system that permits more complete coverage of an area then spot type temperature detectors

A

Continuous loop system

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7
Q

What is the principle of operation of a kitty continuous loop fire protection system?

A

Two wires embedded in a ceramic core within a tube one wire is ground. The second wire is a hot lead.

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8
Q

What is the principle of operation in a Fenwall continuous loop fire protection system

A

Single nickeled wire, surrounded by your attic salt and a tube. The resistance is sharply lowered with temperature rise.

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9
Q

What is the purpose of a fire extinguishing system?

A

Dilute the atmosphere around a fire with an agent that does not support combustion

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10
Q

What are two methods used to distribute fire extinguisher agents

A

Perforated tubing and discharge nozzles

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11
Q

how is an HRD fire, extinguishing agent distributed?

A

Open end tubes

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12
Q

How long does it take to discharge a HRD agent?

A

One to two seconds

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13
Q

what group of fire extinguishing agents are no longer being manufactured because of the environmental concerns and subjected to strict handling and disposal regulations

A

Helon, Freon or chlorofluorocarbon

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14
Q

what are the essential ingredients necessary for any fire to occur?

A

Heat fuel and oxygen

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15
Q

what is the purpose of a discharge cartridge and how is it activated?

A

electrically operated and releases, the fire, extinguishing agent

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16
Q

What are the red and yellow discs located with a fire extinguishing system used to indicate

A

Red is thermal discharge and yellow is normal discharge

17
Q

what is likely to happen an engine fire sensing loop is excessively kinked or bent

A

False fire warning

18
Q

what indicates low agent pressure in a container in a fire extinguisher system?

A

Pressure gauge

19
Q

What is the proper method for determining the fire extinguisher container pressure

A

container gauge pressure with a pressure temperature chart

powerplant (11 decks)

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