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Volume 2 URE's

ALL volume 2's URE's

QuestionAnswer
Atmospheric pressure at sea level is 14.7 PSI
A barometer is designed to measure pressure in inches of mercury
the primary force an airfoil has to defeat is weight
the force that acts upward at a right angle to the direction of the relative wind is lift
the force that acts parallel to the relative wind is drag
the stess that resists the force tending to cause one layer of material to slide over an adjacent layer is called shear
what is the design that uses any combination of longerons, stringers, bulkheads and frames in the construction of the fuselage called? semi-monocoque
the structural members used to give shape to the aircraft and to provide a means for attaching the skin to the structure are called stringers
the most common type of material used for fuselage contruction is aluminum alloy
The wing design used on most modern military aircraft is cantilever
The fixed vertical surface of the empennage is called the fin
engine mounts are typically made of corrosion-resistant steel that is able to withstand forces of 180,000 to 200,000 psi
the main diffrence between inspection plates and panels is size
a network of ultrafine cracks that form on or under the surface of transparent plastics is called crazzing
what are the refrence locations in the vertical direction measured from a reference datum that is usally well below the aircraft called waterlines
movement about the vertical axis is called yaw
which flight control surface is a longitudinal control surface? aileron
which of these is attached to the trailing edge of a horizontal stabilizer elevator
when making a right turn, the relative posistion of the ailerons is the right aileron trailing edge is up, left aileron triling edge is down
The purpose of wing flaps is to? increase lift an drag
the purpose of the aircraft trim system is to correct minor deviations in flight attitude
matter is any substance that has mass and occupies space
atoms are made up of protons, neutrons and electrons
electrons can be released from their outer orbit by all the following forces except cold
what is the electrical pressure that causes electrons to flow through the conductor called? electromotive force
if you apply 25 volts through a total resistance of 6 ohms in a series circuit, the amperage would be 4
a permanet magnet is produced from a material with high reluctance and low permeability
when soft iron is brought close to a permanet magnet is magnetized
the greater the current flow throgh an electromagnet, the greater the stregnth
current flow in the most aircraft circuits is controolled by switches
the majority of aircraft circuit protection decices are normally located in the aircraft cabin
what term describbes current that reverses its direction at regularrly recurring intervals? alternating
the mothods used to cool brushless alternating current(AC) generators are engine oil and blast air
the output of the constant speed drive (CSD) used to drive a 60/80 kilovolt ampere (KVA) generator is aproximateky 8,000rpm
the underspeed switvh (USS) on the 60/80 kilovolt ampere (KVA) constant speed switch drive activates at 365 Hz
What supplies rotary power to the input gear of the constand speed drive (CSD)? accessory gearbox
A bettery's internal componet that is a grid or framerwork which supports the active chemical materials is called the Plate
A 24-volt nickel-cadium bettery has 19 cells
the nickel-cadium battery can be fuLLy charged only by constant current
what tyype s s of motor can operate on alternating current (AC) or direct current (DC)? Universal
A shunt type motor has low starting toque an good speed requlation
the three states of matter are liquids, gases an solids
when any force causes a solid to change permanently, the soldi is said to have passed the elastic limit
the most outstanding characteristc of a liquid is its ability to conform to the shape of its container
what usually produces flow in a pneudralic system? pistion pushing the fluid
who was among the first to study the compressibility of gasses Boyle
if 50 psi of cylinder pressure acts on a 5 square inch pistion head, what will the resulting force be? 250 pounds
when an 8-square inch pistion moves 5 inches within a cylinder what volume of liquid is displaced 40 cubic inches
turbulance affects fluid flow in a hydraulic line by creating resistance and loss of energy
A tube whose cross section area is gradually reduced to a smaller size diameter is called a venturi
the purposes of a hydraulic resevoir are to replenish fluid, allow for thermal expansion and provideae a means of bleeding air from the system
the amount of fluid a pump produces on each cycle or revolution is called its displacement
when referring to hydraulic hand pumps, double acting means fluid flow is crested with each stoke of the pump handle
variable-volume pumps do not require a seperate pressure-regulating device in the system because they have an integral compensator
what provides for cooler operation in a stratopower variable-volume hydralic pump? creeap plates
in s the stratopoower variable-volume pump, what holds the pistions in contact with the cam plate? nutating plate
the purpose of a hydraulic motor is to convert hydraulic pressure into rotary mechanical motion
how is the piston installed in an acumulator? hollow end toward the air side of the accumulator
the size of one micron is four? millionths of an inch
in a hydraulic sysetm, the hydraulic manifold provides a location where the common fluid lines can come together
the purpose of an actuating cyclinder is to transform fluid pressure into a mechanical force
what pneudraulic system componet uses a single acting cylinder brake assembly
what pneudraluc ssystem commponetuseaes a double acting balanced actuating cylinder? nosewheel steaerring
which actuator type slows down oistion travel when the pistion nears either end of the cylinder intenal snubber
a manual poppet type selector valve is in working position when the camshaft is rotated to unseat one pressure poppet and one return poppet
the major advantage of the manual slide-type hydraulic selector valve is its metering ability
normally, what posisiton hydraullic selector valves solenoid
the adcantageof an electrically controlled solenoid valve is its reduced weight
the diffrence between a selector valve and a servo valve is that the servo valve controls fluid flow
another name for a flapper check valve is a gate check valve
what is the purpose of the arrow on a check valve show the direction of free flow through the valve
which of these allows normal operating speed of a hydraulic acuator in one direction while limiting speed in the other direction restrictor check valve
what are the s basic units s of a s hydrauulic hand pump system? resevoir, pump, acutator and manual shutoff valve
the resevoir supplies hydraulic fluid to the handpumo by gravity and the suction effect of the pump
when pressure in a hydraulic systen with a variable-volume pump increses, the fluid flow decreases
the s purposse s sof the torsion linkdks on a main landing gear is to prevent the inner cyclinder from rotating within the outer cylinder
how is the motion of the landing gear control lever transmitted to the selector valve? by a cable system
what prevents the lock solenoid from energizing when the nose landing gbgear is off center? centering switch
electromagnetic devices capable of sensing magnetically conductive metal targets on landing gears are known as proximity sensors
a unit that is a combination of the landing gear shimmy damper and sterring unit is known as a steer damper
what position must the landing gear control handle be in before emergency extension of the landing gear DN
what slows the free fall of the main landing gear during the emergency extension sequence? snubbing mechanism
the purpose of the landing gear warning horn is to sound when the gear is safe
brake fade is defined as a gradual braking action loss due to overheating
a major disadvantage of mulitaple disc brakes is that they warp when overheated
what automatically compensates for brake wear on the segmented rotor brake? adjusters
the purpose of the sntiskid systemm is to prevent wheel skid by releaseing pressure ffrom the skidding wheel
the purpose of deboostes is to? reduce braking pressure
aircraft wheels are normally conctructed of magnesium and/or aluminum alloys
split type wheels are balanced individually by halves
what maintains s an airticgbght seal betweeaen split typpe sheel halves? an O-ring
what preveaents tire explossicion from excessive heat buildup? thermal relief plugs
what type of bearings are used on aircraft wheels? tapered roller
the bearing cone of an aircraft wheel bearing is also called the inner race
when cleaning aircraft wheel, you should not use a wire brush
installed bearing races should be free of scratches, dents and overheating marks
the main parts of an aircraft tire are the tread and sidewall cord body, and beads
what prevents pressure buildup an separation of cord piles or tread rubber on an aircraft tire? vent holes
for tires 24 inches or greater outside diameter, the tire must be removed when wear reaches the bottom of any tread goove for a continous length of 12 inches
Created by: Jeffhawkins5