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IFSTA ARFF 6th Edition exam 2024- CERTIFIED WITH QUESTIONS AND 100% CORRECT ANSWERS what critical aircraft systems is hydraulic pressure used in? - CORRECT ANSWER1. nose gear 2. landing gear 3. steering 4. brakes 5. wing flaps why is synthetic hydraul$21.49
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IFSTA ARFF 6th Edition exam 2024- CERTIFIED
WITH QUESTIONS AND 100% CORRECT
ANSWERS
what critical aircraft systems is hydraulic pressure used in? - CORRECT ANSWER1.
nose gear
2. landing gear
3. steering
4. brakes
5. wing flaps
why is synthetic hydraulic fluid most widely used? - CORRECT ANSWERsignificantly
reduces flammability hazard. it's Flashpoint is twice that of non-synthetic fluid, and once
on fire, the flame spread rate is slower.
what is the most common synthetic hydraulic fluid? - CORRECT ANSWERA phosphate-
ester-based material.
what makes up the wheel assembly? - CORRECT ANSWER1. rims
2. brakes
3. tires
what is another name for the wheel assembly? - CORRECT ANSWERbogie
fusible plugs - CORRECT ANSWERautomatically deflate the tires when the rim reaches
a predetermined temperature
when my brakes and wheels reach their maximum temperature? - CORRECT
ANSWER20 to 30 minutes after the aircraft comes to a stop
when dealing with a landing gear emergency such as hot brakes or a gear fire how
should a firefighter approach the gear assembly? - CORRECT ANSWEReither forward
or aft at a 45 degree angle
how high can tire pressure be in large aircraft? - CORRECT ANSWERover 200 PSI
what are aircraft tires usually filled with? - CORRECT ANSWERnitrogen
what type of electrical systems do light aircraft operate on? - CORRECT ANSWER12 or
24 volt DC Systems
,what type of electrical systems do large aircraft operate on? - CORRECT ANSWER24 /
28 volt DC, volt AC, and 400 Hertz
what are the three General types of aircraft batteries? - CORRECT ANSWER1. lead
acid
2. nickel cadmium
3. lithium ion
What is the usual voltage in aircraft batteries? - CORRECT ANSWER12 to 30 volts
what will batteries usually be near? - CORRECT ANSWERthe ground power connection
what must be accomplished prior to deenergizing the Electric System? - CORRECT
ANSWERall aircraft shutdown functions
which system on passenger aircraft have their own batteries? - CORRECT
ANSWERemergency lighting system
to what do Apu turbine engines provide pneumatic air and AC Electrical Power to? -
CORRECT ANSWER1. start aircraft engines
2. power cockpit
3. recharge batteries
4. light cabin
5. maintain comfortable cabin temps
6. backup electrical power source while the aircraft is airborne
how many air intakes dors the apu need to function? - CORRECT ANSWER2 - one for
operation in one to cool the compartment
Monopropellant - CORRECT ANSWERChemical or a mixture of chemicals that is stable
under specific storage conditions, but reacts very rapidly under other conditions to
produce large amounts of energetic gasses. - hydrazine is commonly used in aircraft
emergency power units
why is the Apu a potential fire hazard? - CORRECT ANSWERit operates on jet fuel
EPU - CORRECT ANSWEREmergency Power Unit
emergency power unit - CORRECT ANSWERfeel the need for a highly reliable and
quickly responsive means of obtaining emergency electrical power and hydraulic power
aboard Airborne aircraft.
what are the three types of epu's? - CORRECT ANSWER1. Ram Air turbine
2. jet fuel
3. monopropellant
,rat - CORRECT ANSWERRam Air turbine
what toxic and caustic fuel Powers monopropellant epu's? - CORRECT
ANSWERhydrazine
hypergolic - CORRECT ANSWERignite spontaneously on contact with an oxidizer
flammable range of hydrazine - CORRECT ANSWER2.9 to 98%
GPU - CORRECT ANSWERGround Power Unit
ground power unit - CORRECT ANSWERused to provide onboard electrical power
while the aircraft engines or Apu are not operating. Can produce either AC or DC power
and come in diesel or gas fueled models.
what are the different varieties of gpus? - CORRECT ANSWER1. Mobil unit
2. fixed mounted on buildings
3. bridge mounted on jetways
which wing tip has a red light? - CORRECT ANSWERleft
which wing tip has a green light? - CORRECT ANSWERright
what color is the light found at the tail section on the end of the fuselage? - CORRECT
ANSWERWhite
Landing lights - CORRECT ANSWERconsists of high-intensity spotlights that can be
found on the wings and landing gear.
anti-collision lights - CORRECT ANSWERrotating or flashing red lights used to indicate
that the aircraft engines are operating can be found on the top of the vertical stabilizer
or on the top and underside of the fuselage
what type of oxygen will the flight crew on Commercial aircraft always use? - CORRECT
ANSWERcompressed
what are commercial aircraft equipped with to create oxygen for passengers? -
CORRECT ANSWERchemically generating oxygen systems
once the reaction has started in a chemically generated oxygen system when will it
stop? - CORRECT ANSWERwhen the chemical is exhausted
where are chemically generated oxygen systems located? - CORRECT
ANSWERseatbacks or an overhead compartments
, passenger aircraft operating at what height are equipped with drop-down oxygen
systems for passengers and supplemental oxygen systems for flight Crews? -
CORRECT ANSWER25000 ft
PBE - CORRECT ANSWERpersonal breathing equipment
most of the time what color are oxygen cylinders painted? - CORRECT ANSWERgreen
what will happen to oxygen cylinders when exposed to fire? - CORRECT ANSWERthey
will usually vent and not explode
what color is liquid oxygen? - CORRECT ANSWERlight blue and transparent
what is the boiling point of liquid oxygen? - CORRECT ANSWER-297 degrees
Fahrenheit
what is the expansion ratio of liquid oxygen? - CORRECT ANSWER860 to 1
what is an acceptable method of stopping a liquid oxygen leak? - CORRECT
ANSWERspray the leak with water fog
what are two hazards associated with radar systems? - CORRECT ANSWER1. ignition
hazard
2. heath hazard
where are aircraft radar systems located? - CORRECT ANSWERin the nose.
what does a typical fire suppression system consist of? - CORRECT ANSWER1.
pressurized canisters
2. tubing to deliver agent
3. nozzles
4. appliances fire actuating and controlling agent discharge
how long does it take for aircraft airbags to deflate? - CORRECT ANSWER10 seconds
detent - CORRECT ANSWERa mechanism within a throttle assembly that prevents the
throttle from being pulled to the full off position without lifting the throttle lever up or
moving it / them slightly to one side before pulling them to the off position
what are the steps in any aircraft shut down procedure? - CORRECT ANSWERthrottles,
bottles, batteries.
what does pulling the fire handle do? - CORRECT ANSWERturns off a fuel valve before
the engine in most cases
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