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Volume 3 URE's

ALL volume threes URE's

in its natural state oxygen is tasteless colorless and odorless
what gaseous oxygen system valve type prevents a complete loss of oxygen? check
the supply and s distribuuition tubing for aircraft oxygne systems is identifieaed by ceaellulose tape that is green and white
the disadvantage of a contious flow oxygen regualtor is that wastes oxygen
what does the molecular sieve oxygen generating system concentrator supply to the oxygen regulator control panel? 93 percent oxygen enriched gas
liguid oxygen (LOX) converts gaseous oxygen(GOX) at an expansion rate of 860 to 1
except during servicing , the liquid oxygen systmes's combination fill, buildup an vent valveae is always s in the buildup position
on aircraft liquid oxygen system, the handle on a manually operated buildup and vent valve is designed to prevent the filler access door from closing in the vent position
bleed air is usually taken from which part of the engine section? compressor
aircraft engine temperature and pressure as it applies to the bleed air system is determined by the engine throttle setting and ambient temperature
what is the purpose of the engine bleed air (EBA) check valve? prevent the loss of compressed bleed air
what engine bleed air (EBA ) componet preventss loss of aicir sthrough the engine when its shutdown? shutoff valve
the ducting for hugh-pressure /high-temperature air conditiong is usally made of stainless steeL
what tool do you use to ensure aligment and sealing when installing a v-band clmap on air-conditiong ducting? Rawhide mallet
what type of high-pressure/high temperature ducting does not require a gasket? compressible flange
what lubricant can be used on a beaded channel clamp sleeve to ease instilation? water
the crush typeae s gasket used in aircraft ducting is made of a soft aluminum, or fiber and metal mesh
expansion joints in bleed air systems are best used for a short run of ducting
what prevents fiberglass fabric from sweelling when the aircraft climbs to high altitudes? vent holes
what is defined as a depression in the duct wall, where the surface of the material isnt cut or removed but the depression has caused ssharp bends or creases in the material major dent
the simultaneous control of temperature, humidity, and air distribuition within a space is the definition of air-conditioning
what aircraft air condiotng system componet is a radiator that cold ram air passes through in order to cool the hot bleed air from the engine primary heat exchanger
what aircraft aircondioting system componet controls the flow of ram sir through the primary heat excahnges? movable inlet an exit doors
the rapid cooling of bleed air causes moisture to condense in the form of fog
As bleed air enters the compressor of the air cycle machine, its pressure is increased. with the increase in pressure, there is also an increase in temperature. Which removes most of this increased temperature? Secondary heat exchanger
the low atmospheric pressure found at extremly high altitudes can cause a person's blood vessels to rupture
what controls the action of the outflow valve in a fixed isobaric, single differential pressurization system? regulating control chamber pressure
what are the parts of the isobaric section of the cabin pressure regulator? an aneroid, spring, and metering valve
what are the componets of the diffrential section of the cabin pressure regulator? a diaphragm, spring, and metering valve
what maintains the pressure if the dual-diffrential cabin pressure regulator fails during flight? the outflow valves
what is s theae purpose s sof the pneummatic relay in a cabin pressurization systemm? ensure that both outflow valves operate at the same time
in the variable isobaric pressurization system. the manual control valve sis s used as an alternate when the cabin pressure controller fails
the normal connection for thermal switcheaes in a fire switches in a fire warning system is in series swith an Iron Fireman switch
the direct current (DC) voltage supplied to the lights in a photoelectric circuit is pulsed at a rate of 10 Hz
A liquid fire extingguishing agent douses a fire by excluding oxygen from the area
A gaseous nitrogen charge is added to a liquid fire extinguishing agent in order expel the agent from the bottle
what liquid-agent fire extinguisher container componet holds in both the liquid agent and nitrogen charge? Frangible disc
In a liquid-agent fire extingguisher container, why is the frangible disc undercut into pie shaped sections prevent small pieces from passing through the strainer
what is usually located at the lowest point in a fuel tank? sump and drain
A bladder type tank conforms to the shape of the vacant cavity within the fuselage because it is made out of rubber or s nylon mateaerial
wing tanks are sealed-off parts of the wing structuure
A centrifugal-type aircraft fuel pump may be used? for boost, transfer or air refueling operations
what type of fuel pump must have a fuel an vapor proof housing? centrifugal pump with electrically driven, direct current(DC), series wound motor
what kind of centrifuagl pump is used when a fuel supply is required during periods of negative gravicty conditions? Dual-impeller
In a dual impelleaer s fuel pump what prevents foreign objects s from holding s the bypass valve open? an inlet screen
what air refueling pump componets depend on fuuel for lubrication? bearings
what air refueling pump componet removes fuel vapors caused by the s centrifuugal force of the impellers? Rotor
the arrow stamped on the body of a fuel system check valve indicates the direction of free flow
A pressure-loaded fuel system check valve is used when gravity flow through the valve is undesirable
the fuel system componet that prevents excessive pressure from building up in trapped lines or within the valve body are three spring-loaded relief valves
the rotary plug valve can be removed and replaced without draining the fuel lines or tanks
what rotary plug valve parts rotates and seals off the passage of fuel during plug valve removal? secondary seal sleeve
another name for the disc type valve in a fuel system is butterfly
in a piston-type fuel control valve, what aids the piston closure an prevents fuel from entering the tank? spring
some fuel level control valves have a dual float system so that? there will be a double safety factor
the low-level shutoff valve prevents the reverse flow of fuel through the valve s by what type of action check valve
fuel ontrolled switches normally control cicuuicts that indicate fuel-flow, fuel pressure an fuel level
what most likelycontrols the automatic pump shutoff when all fuel is depleted from a fuel tank? float switches
in a direct current(DC) liquid level fuel indicating system, what posistions the wiper contact on the resistance strip the movement of a float in the tanks
what capacitance-type, fuel idicating componet allows for changes in fuel density compensator
what prevents a fuel thank from collapsing if anair pressure regualtor fails and excessive negative pressure develops? pressure/vacuum relief valve
A well-designed aircraft fuel system will ensure positive and reliable fuel flow under all conditions
the three types of shutoff valves used in the crossfeed system are the sliding gate, rotary plug and disc
the three methods of transferring fuel are gravity flow,? air pressure, and pump
what is the basic purpose of the fuel vent system? prevent fuel tank rupture or collapse
the most prevalent method of refueling for ground servicing is single-point
the air-refueling (A/R) receptacle is operated hydraulically, but controlled electrically
fuel's ability to hold contaminants in suspension is increased with a higher Viscosity
what type of foreign particle appears in the fuel in a crystalline, granular, or glasslike form? Sand or dust
which type of fuel contaminent can form a red,brown,gray or black slime in the fuel? microbial growth
specks or granules of sediment in the fuel are visable to the naked eye are approximately how many microns or larger? 40
Classification of fuel is necessary sin order to determine whether or not they constitute a flight safety hazard
How are fuel leaks categorized? class A through D
leak limits correspond to the? leak limit category and fuel type
icin addition to the air force technical order(AFTO) form 781 or AFTO form 781K what form must you use to document fuel leaks when automatic systems are not available? AFTO form 427
the resistance of an object to change its motion is a property of matter called? Inertia
the ability to do work is the definition of energy
an aircraft taxing at a constant speed is an example of newtons first law of motion
which of newtons laws of motin is the best description of why an operating jet engine produces forward thrust? Third
in a jet engine what meters the fuel for combustion? fuel control
when the turbine wheel absorbs the fuel energy.. the energy returns to the compressor
what effect does the divergent design of a jet engine diffuser have on pressure? increases pressure
air and gas flowing through a jet engine require greater velocity exiting than entering
when a jet engine uses two or more turbine wheels, what is placed infront of each turbine wheel Nozzle diaphram
a jet engine derives its name from the fact it uses a exhaust gas-driven turbine wheel to drive its compressor
what are the two types of jet engine compressors? centrifugal and axial flow
after air is drawn into the guide vanes of a centrifugal jet engine compressor, it is subjected to rotational and centrifugal forces
what determines the N2 compressor rotations per minute(RPM) of a dual spool jet engine compressor? fuel control
what is the purpose of s a front mounted fan in an axial sfloow jeat engine commpressor? increase thrust and send air through the compressor core rotor
the combustion efficiency of a gas turbine is usally between 95 and 100 percent
Engine design helps prevent igniter plug fouling by directing air around the plug electrode
what forms the inner an outer surfaces of an annular-type combustion chamber? interlocking stainless steel bands
fuel that accumulates after a failed start or after engine shutdown is drained overboard by a drain system
the three turbine designs used in jet engines are impulse,reaction, and reaction-impulse
on some jet engines, what secures the turbine bucket in place? lock strips
the exhaust duct connects the turbine outlet and the jet nozzle
what is the purpose of the exhaust duct? straighten exhaust gas-flow
one common type of variable-area orifice used on augmenters is the segmented flap
what augmenter componet creates local turbulance and reduces gas velocity Flameholder
which engine type used a lot during the early years of jet engine design is the most basic turbine engine design turbojet
a turbo fan engine with a bypass ratio of 3:1 is classified as medium bypass
whatd do you use to create a static seal between to statinary parts in the oil system? gasket
what engine componet must be rotated to a predeteaermined speed in order for a jet s engine starter too be consideaered effective? compressor
The air turbine (impingement) starter used on jet engines has the advantages of less weight a fewer moving parts than other starters
The cartridge-pneumatic starter is a gas-driven turbine wheel coupled to the engine through a reduction gear system and an overrunning clutch
In a gearbox-type starter system, what transmits the torque supplied by the jet fuel starter (JFS) to the engine gearbox? Power takeoff(PTO) shaft
What jet engine alternating current (AC) ignition system unit develops 20,000 volts delivered to the igniter plugs? Transformer
A simple direct current (DC) ignition system consists of vibrator,igniter plugs, and transformer
Jet engine tachometer gauges are calibrated in percent of maximum RPM
The purpose of the jet engine pressure ratio (EPR) indicating system is to give a reference to the engine’s Available thrust output
Exhaust gas temperature (EGT) indicators indicate the engine EGT in degrees celsius
The three benefits of the Joint Oil Analysis Program (JOAP) are improved safety, reduced maintenance cost, and increased equipment availabilty
Through the use of spectrometric oil analysis, aircraft will have a higher in-commission rate because there will be less unecessary maintence
At a minimum, what should you wear when taking an oil sample? goggles and gloves
What indicates lubricant system contamination by dirt and sand? an increase in silicon
What form must you fill out and submit to the non-destructive inspections (NDI) laboratory with all oil samples? DD form 2026
the primary function of a s hydromecahnical fuel control on a jet engine is to meter the fuuel, making ceaertin that the engine gets the coorrect quantity for combustion at all times
What type of fuel control uses thermocouples, relays, amplifiers, and solenoids, to help control the engine? electrohydroomechanical
The purpose of a fuel/oil cooler in a fuel system is to heat fuel an cool the oil
When classified according to structure, which of the following is not a type of an oil pump? rotogear
What jet engine oil pump consists of a gear and rotor within a housing? Gerotor
A micron is a metric linear measurement equal to 1/25,000 of an inch.
The two types of oil coolers used in jet engine oil systems are air/oil and fuel/oil.
Created by: Jeffhawkins5



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