FAA O&P-M.K.

Briefly describe the components of a thermal switch fire detection system

Temperature sensitive switches that complete a circuit at a specific temperature and trigger a warning

Are thermal switches wired in series or parallel with each other

Parallel

How are detector units in a double loop fenwal system wired

In parallel between two complete loops of wiring

In what way is a thermocouple fire warning system different from a thermal switch system

Thermocouple systems are sensitive to the rate of temperature change, whereas thermal switch systems respond to a specific temperature value

Briefly describe the components of a kiddie continuous loop fire detection system

A kiddie system has inconel loop whose resistance changes with temperature

Briefly describe the components and operation of a lindberg fire detection system

a stainless steel tube contains an intert gas and a discrete material that absorbs some of the gas. When the tube heats up some gas is released raising the pressure in the tube, which activates a pressure switch

Describe the process or mechanism by which a photoelectric smoke detector generates a warning of a possible fire

Smoke particles refract light in the detector unit causing the photoelectric cell to conduct electricity and trigger the alarm

How can the operation of a photoelectric smoke detector be tested

By actuating a test switch

Name two types of smoke detection systems used in aircraft

Light refraction and ionization types

What are the usual locations where a carbon monoxide detector would be installed

In the cabin or cockpit

How does a carbon monoxide tester detect the presence of a deadly gas

The tan spot on the detector turns gray or black

What are the possible effects of kinks and sharp bends in sensing elements of a fire warning system

false fire warnings from short circuits

How is a freon container checked for proper pressure

a chart must be used to determine the maximum and minimum gauge pressure readings based on the ambient temperature

Name the two basic types of fire extinguishing systems

The conventional system and the high rate discharge system

Name the extinguishing agent most commonly used by conventional fire extinguishing systems

Carbon dioxide

Name the extinguishing agent most commonly used by high rate of discharge fire extinguishing systems

Halon, also known as Freon

How are freon bottles protected from excessively high temperatures and how can you tell this has occured

A thermal fuse will release the agent if the bottle temperature exceeds a certain limit. This blows out a red indicator disk

What condition is indicated if the yellow disk is missing in a fire extinguishing system

The system has been discharged normally

Describe the mechanism by which a freon bottle is discharged

An electrical signal fires an explosive squib, which ruptures a frangible disk

How is the service life of a discharge cartridge calculated

From the date stamped on the cartridge by the manufacturer