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Giles CDCs- Volume 2
| Question | Answer |
|---|---|
| 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 of the following forces except | Cold |
| What is the electrical pressure that causes electrons to flow through the conductor called | Electromotive force |
| If you apply 24 volts through a total resistance of 6 ohms in a series circuit, the amperage would be | 4 |
| A permanent magnet is produced from a material with | High reluctance, low permeability |
| When soft iron is brought close to a permanent magnet it is | Magnetized |
| The greater the current flow through an electromagnet, the | Greater the strength |
| Current flow in most aircraft circuits is controlled by | Switches |
| The majority of aircraft circuit protection devices are normally located | In the aircraft cabin |
| What term describes current that reverses its direction at regularly recurring intervals | Alternating |
| The methods 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 60/80 kilovolt ampere (KVA) generator is approximately | 8,000 rpm |
| The underspeed switch (USS) on the 60/80 kilovolt ampere (KVA) generator constant speed drive (CSD) actuates at | 365 Hz |
| What supplies rotary power to the input gear of the constant speed drive (CSD) | Accessory gearbox |
| A battery's internal component that is a grid of framework which supports the active chemical materials is called the | Plate |
| A 24 volt nickel cadmium battery has how many cells | 19 cells |
| The nickel cadmium battery can be fully charged only by | Constant current |
| What type of motor can operate on alternating current (AC) or direct current (DC) | Universal |
| A shunt type motor has | Low starting torque and good speed regulation |
| The 3 states of matter are | Liquids, gases, and solids |
| When any force causes a solid to change permanently, the solid is said to have | Passed the elastic limit |
| The most outstanding characteristic of a liquid is its | Ability to conform to the shape of its container |
| What usually produces flow in a pneumatic system | Piston pushing the fluid |
| Who was among the first to study the compressibility of gases | Boyle |
| If 50 pounds per square inch (psi) of cylinder pressure acts on a 5 square inch piston head, what will the resulting force be | 250 pounds |
| When an 8 square inch piston moves 5 inches within a cylinder, what volume of liquid is displaced | 40 cubic inches |
| Turbulence 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 reservoir are to | Replenish fluid, allow for thermal expansion, and provide a means of bleeding air from the system |
| The purpose of a stand pipe in a reservoir is to | Reserve fluid for the emergency pump |
| The amount of fluid a pump produces on each cycle or revolution is called its | Displacement |
| When referring to hydraulic hand pumps, double action means | Fluid flow is created with each stroke of the handle |
| Variable volume pumps do not require a separate pressure regulating device in the system because | They have an integral compensator |
| What provides for cooler operation in a stratopower variable volume hydraulic pump | Creep plates |
| In the stratopower variable volume pump, what holds the pistons 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 accumulator | Hollow end toward the air side of the accumulator |
| The size of one micron is four | Millionths of an inch |
| In a hydraulic system, the hydraulic manifold provides a location where the | Common fluid lines can come together |
| The purpose of an actuating cylinder is to transform fluid pressure into | Mechanical force |
| What pneudraulic system component uses a single acting actuating cylinder | Brake assembly |
| What pneudraulic system component uses a double acting balanced actuating cylinder | Nosewheel steering |
| Which actuator type slows down piston travel when the piston nears either end of the cylinder | Internal snubber |
| A manual poppet type selector valve is in a 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 positions hydraulic selector valves | Solenoid |
| The advantage of an electrically controlled solenoid valve is its | Reduced weight |
| The difference between a selector valve and a servo valve is that the | Servo valve controls fluid flow |
| Another name for a flapper check valve is | 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 actuator in one direction while limiting speed in the other direction | Restrictor check valve |
| What are the basic units of a hydraulic hand pump system | Reservoir, pump, actuator, and manual shutoff valve |
| The reservoir supplies hydraulic fluid to a hand pump by | Gravity and the suction effect of the pump |
| When pressure in a hydraulic system with a variable volume pump increases, the fluid flow | Decreases |
| The purpose of the torsion links on a main landing gear is to | Prevent the inner cylinder 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 gear 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 dampener and steering dampener unit is known as | A steer dampener |
| What position must the landing gear control handle be in before emergency extension of the landing gear | DN (down) |
| 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 gear is not safe |
| Brake fade is defined as a gradual braking action | Loss due to overheating |
| A major disadvantage of multiple disc brakes is that they | Warp when overheated |
| What automatically compensates for brake wear on the segmented rotor brake | Adjusters |
| The purpose of the antiskid system is to | Prevent wheel skid by releasing pressure from the skidding wheel |
| The purpose of deboosters is to | Reduce braking pressure |
| Aircraft wheels are normally constructed of | Magnesium and/or aluminum alloy |
| Split wheels are balanced | Individually by halves |
| What maintains an airtight seal between split wheel halves | An O-ring seal |
| What prevents tire explosion 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 wheels, 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, | Card body, and beads |
| What prevents pressure buildup and separation of cord plies 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 groove for a continuous length of | 12 inches |
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PhantomGile
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