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Volume 2 URE's
ALL volume 2's URE's
| Question | Answer |
|---|---|
| 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
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