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WorksheetsFire Protection
Total questions: 43
Worksheet time: 43mins
Fire systems must operate off aircraft's?
28VDC Hot battery bus
28VDC Essential bus
28VAC Essential bus
Overheating systems are used in areas of?
High temperature that may lead to fire
Average temperature that may lead to fire
Low temperature that may lead to fire
What are thermostat switches or spot detectors know as?
Thermal switch detector
Thermocouples
Continuous loop sensing elements
What is the disadvantage of a thermal switch system operation?
The test switch only test the system loop, not the individual sensors
No redundant indication light
The Bell Cancel light is fairly inconsistent in operation
The individual switches can be tested in a thermal switch detector using?
Ohmmeter
Thermometer
Frequency counter
Installation of a switch with a different operating temperature in a thermal switch system will?
Cause a false warning or no waring in event of fire
Be compliant
Cause complete system malfunction
Which junction is open and is exposed to the air around it in a thermocouple fire detection system?
Hot junction
Cold junction
Both
When the hot junction in a thermocouple fire detection system is exposed to heat, there is an increase of current. The current is considered to be?
Directly proportional to temperature
Inversely proportional to temperature
Linear proportional to temperature
Thermal switches have to be tested with?
Jet-Cal
Thermostat
Multi-meter
What is used in a thermocouple fire detection system to detect a fire through an imbalance in temperature readings activating a warning?
Reference thermocouple
Thermal insulation
Sensitive relay
What type of testing is carried out on a thermocouple fire detector system?
Continuity of the whole system
Continuity of the system except the individual thermocouples
Operation of the sensitive relay
Which type of fire detection system permits more complete coverage of a fire hazard area than any other type of spot-type temperature detectors?
Continuous loop
Thermocouple
Thermal switch
Fenwal and Kiddle system are primarily used in fire detection and?
Overheating detection in bleed air systems
Overheating detection in engine exhaust systems
Overheating detection in de-icing systems
Which type of continuous loop fire wire system has a single conductor element construction consisting of a thin wall tube of approx. 2mm diameter made from Inconel filled with compound?
Fenwal
Kiddle
Thermocouple
What are the two types of Fenwal single conductor element fire wire?
Ceramic beads and aluminium oxide in fibrous glass
Nickle conductor with a thermistor and thermocouple
Ceramic core and aluminium oxide
When does the resistance increase in a ceramic bead type Fenwal conductor?
When the salts cool
When the salts heat up
When temperature increases
Which type of Fenwal conductor resistance of the compound lowers with heat and its dielectric qualities qualities improve so that the capacitance of the wire is higher as temperature increases?
Ceramic beads
Aluminium oxide
Inconel
What type of temperature coefficient is a Kiddle two conductor element wire?
Negative
Positive
Neutral
What principle does a pneumatic continuous loop system work on?
Contained gas expanding due to heat
Conductance through dissimilar metals
Radiation or light between two surfaces
Which fire detection unit senses an overall average temperature threshold and a localized discrete temperature increase cause by impinging flame?
Pneumatic continuous loop
Fenwal
Kiddle
How is discrete temperature sensing accomplished in a pneumatic continuous loop system?
Hydrogen filled core material in a sensor tube
Expansion of a fixed volume of helium gas inside the detector
Stainless steel tube with an inert gas inside
How is average temperature sensing activated in a pneumatic continuous loop system?
Expansion of a fixed volume of helium gas inside the detector
A hydrogen filled core material in the sensor tube
A stainless steel tube with an inert gas inside
Which function of a pneumatic continuous loop system is considered to be reversible?
Average temperature
Discrete temperature
Both
Which type of fire detection system is tested by a supply of low voltage AC current to the outer stainless steel casing?
Lindberg
Systron-Donner
Thermocouple
The test carried out on a Lindberg system verifies?
Integrity of control unit, interconnecting of wiring and the detector unit
The correct output from the AC bus and the functionality of the bell
The functionality of the warning light, the interconnection of the wiring and the serviceability of the test unit
If the integrity switch opens i.e the loop fails
The system control box will isolate the defective loop and reconfigure to a single loop operation using the good loop system
The system will completely fail and operation will seize
The system control box will isolate the defective loop and reconfigure to a single loop operation using either loop system
When replacing fire wire in a continuous loop fire detection system
Ensure the wire is installed in the same path as the wire being replaced
Ensure there is no bends sharper than a 2 inch radius
The grommets are placed in a position so the wire can only touch the clamp if it moves
If there is a single double break in the wire element, what will occur?
Dead spot
No change
Short to ground
What components in this system are able to be tested?
Wiring
Wiring and the switches
Wiring and the relay
What are the two main type of smoke detector systems?
Photoelectric and ionisation
Carbon monoxide and capacitance
Reactive an proactive
In a refraction smoke detection system, what angle is the photoelectric cell placed at relative to the light beam?
90 degrees
60 degrees
30 degrees
What is used in a refraction photoelectric system to form part of a test circuit which activates the photo diode to simulate a smoke condition?
LED
Beacon lamp
Test lamp
Which type of smoke detector has an electrode with a very small amount of radioactive material in one side of the smoke detection chamber?
Ionisation type
Comparison type
Photoelectric type
What can be used to provide a vacuum to draw air through he smoke detectors?
Venturi ejector
Fan
Blower
Turbine engine aircraft today are typically high rate of discharge system also know as?
Fixed fire extinguishing
Non-fixed fire extinguishing
Floating fire extinguishing
Which fire extinguishing system utilises halogenated hydrocarbons in one or more containers and a distribution system that releases the extinguishing agent through perforated tubing or discharge nozzles?
HDR
SDR
Auxiliary
What colour label are extinguishing agent pipelines and what shape is used?
Brown and diamond
Brown and triangle
Brown and square
What is the purpose of the RH engine fuel/fire sov?
Turns fuel flow off to the engines
Releases the two bottles for extinguishing
Drives the solenoid to activate the selector switch
What colour indicates high temperature on the indicator strip in a lavatory fire extinguishing system?
Black
White
Red
What is a negative to the fire extinguisher bottle in the lavatory fire extinguisher system?
The bottle cannot be recharged
It's operating temperature is only 60 degrees Celsius before it releases
Difficult to access the storage area under each wash basin without damaging the furniture
Where can an APU fire bottle be discharged from?
Cockpit
Remote location fire panel
Both
When checking APU extinguisher circuits, what must be used?
Ohmmeter
Safety ohmmeter
Multimeter
Where are water based or dry powder extinguishers not to be located?
Pilot compartment
Passenger compartments
Under seats
