2A531 CDC'S volume 2
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| The maintenance stand with an adjustable height of 13 to 20 feet is the | b-2
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| Of the following, the maintenance stand that is a scissor-type is the | b-4
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| The type of jack normally used to change a tire on the aircraft is the | axle
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| The boiling point of liquid oxygen (LOX) is | –297°F
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| The low- and high-pressure capabilities, as measured in pounds per square inch gage (psig), of the NSU-L75 nitrogen-servicing unit are | 0–350; 350–3,600.
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| The high-pressure pump provides a hydraulic filler pressurization unit with a maximum pressure of | 3,000 psi.
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| The model 4000 engine trailer can support a maximum load of | 8,000 pounds.
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| The usable pressure range, as measured in pounds per square inch (psi), of the MC–1A air compressor is | 0–3,200.
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| The MC–2A air compressor is capable of delivering air at a maximum pressure, measured in pounds per square inch (psi), of | 250
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| The H–1 heater has an adjustable heat output that ranges from | 150°F to 280°F.
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| The stationary, skid-mounted power unit that produces aircraft electrical power for use in shops and hangars is the | MD–4.
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| The unit capable of providing both alternating current (AC) and direct current (DC) electrical power in addition to pneumatic power for ground maintenance is the | A/M32A–60.
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| The hydraulic systems on the MK–3A–1 hydraulic test stand are designated | No. 1 and No. 2.
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| The amount of fluid the MJ–2A reservoir holds is | 27 gallons.
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| A Class I MB–2 tractor weighs | 40,000 pounds.
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| The structural members, whose chief use is to give shape to the aircraft and provide a means for attaching the skin to the structure, are called | stringers.
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| The most common type of material used for fuselage construction is | aluminum alloy.
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| The wing components that provide strength and contour shape to the wing are the | ribs.
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| The main difference between inspection plates and panels is | size.
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| A cracked radome could cause | microwave distortion.
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| The reference locations, which are in the vertical direction measured from a reference datum that is usually well below the aircraft, are called | waterlines.
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| The category of –21 equipment used for life support and crew comfort is | III
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| The effective range of a fully charged handheld fire extinguisher is | 20 feet.
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| The first practical laminated composite formed was | plywood.
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| A barometer is designed to measure pressure in | inches of mercury.
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| Atmospheric pressure at sea level is | 14.7 pounds per square inch
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| The force that acts parallel to the relative wind is | drag.
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| The axis that extends lengthwise through the fuselage from the nose to the tail is the | longitudinal.
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| The axis that extends crosswise from wing tip to wing tip is the | lateral.
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| Movement about the vertical axis is called | yaw.
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| The flight control located on the longitudinal control surface is the | elevator.
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| The type of flight control system that allows the pilot to control the aircraft if hydraulic pressure is lost is | manual.
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| When making a right turn, the relative position of the ailerons is the right aileron | up, left aileron down.
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| The flight control surfaces used to make an aircraft climb or dive are | elevators.
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| The type of flap normally incorporated on bomber and cargo type aircraft is | fowler
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| Aircraft have trim systems to | correct minor deviations in flight attitude.
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| The law that states, “the distortion of any elastic body is proportional to the distorting force” is known as | Hook’s Law.
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| When any force causes a solid to change permanently, the solid is said to have | passed the elastic limit
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| The most outstanding characteristic of a liquid is its | ability to conform to the shape of its container.
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| Pascal’s Law applies to | confined fluids at rest.
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| Among the first to study the compressibility of gases was | Boyle
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| The person who found that all gases expand and contract in direct proportion to the change in temperature, provided the pressure remains constant, was | Charles.
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| If 50 pounds per square inch (psi) of cylinder pressure acts on a 5-square-inch piston head, the resulting force will be | 200 pounds
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| When an 8-square-inch piston moves 5 inches within a cylinder, the volume of liquid displaced will be | 40 cubic inches.
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| The principle, which states that as the velocity of a gas or liquid increases, pressure decreases, is | Bernoulli’s.
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| As fluid enters the narrow portion of a venturi, | it accelerates.
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| When referring to hydraulic hand pumps, double-action means | fluid-flow is created with each stroke of the pump handle
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| Variable-volume pumps do not require a separate pressure-regulating device in the system because | they have an integral compensator.
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| Cooler operation in a variable-volume hydraulic pump is provided by | creep plates
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| In the Stratopower variable-volume pump, the pistons are held in contact with the cam plate by the | nutating plate.
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| An accumulator’s piston is installed with the | hollow end toward the air side of the accumulator
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| The size of one micron is four | millionths of an inch
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| If a filter is rated at 10 microns nominal, it | may allow some particles 10 microns or larger to get through.
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| Hydraulic manifolds are used in a hydraulic system to provide a location where the | common fluid lines can come together.
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| The pneudraulic system component that uses a single-acting actuating cylinder is the | brake assembly.
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| What pneudraulic system component uses a double-acting balanced actuating cylinder? | Nosewheel steering
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| Some aircraft manufactures use the term “power control cylinders” when referring to | tandem actuators.
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| The pressure at which the relief valve ball is slightly unseated is called the | cracking pressure
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| The major advantage of the manual slide-type hydraulic selector valve is its | metering ability.
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| The difference between a selector valve and a servo valve is the | servo valve will control fluid-flow.
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| The purpose of a hydraulic system check valve is to | allow flow in only one direction
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| Another name for a flapper check valve is | gate check valve.
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| Allowing normal operating speed of a hydraulic actuator in one direction while limiting speed in the other direction is done by the | restrictor check valve.
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| The four major sections of a basic hydraulic system are | supply, pressure, return, and auxiliary
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| The basic units of a hydraulic hand pump system are the | reservoir, pump, actuator, and manual shutoff valve.
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| The reservoir supplies hydraulic fluid to a hand pump | by gravity and the suction effect of the pump
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| A relief valve is installed in a variable-volume hydraulic pump to | relieve pressure if the pump compensator fails.
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| In most hydraulic subsystems, the actuating units are connected | in parallel
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| The shock strut component that controls the rate of fluid-flow through the orifice is the | metering pin.
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| The purpose of the torsion links on a main landing gear is to | prevent the inner cylinder from rotating within the outer cylinder
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| The motion of the landing gear control lever is transmitted to the selector valve | by a cable system.
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| Landing gear safety switches are actuated by | torsion links.
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| The two most common types of shimmy dampers used in nose wheel steering are the | piston and vane.
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| The purpose of aircraft brakes is to | retard motion using friction.
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| The purpose of deboosters is to | reduce braking pressure
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| The two types of emergency brake systems are | hydraulic and pneumatic.
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| The purpose of the antiskid system is to | prevent wheel skid by releasing pressure from the skidding wheel.
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| Split wheels are balanced | individually by halves.
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| An airtight seal is maintained between split wheel halves by use of | an O-ring seal
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| The type of bearings used on aircraft wheels is | tapered roller.
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| The bearing cone of an aircraft wheel bearing is also called the | inner race.
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| The kinds of pitting that affect bearings are | corrosive and mechanical
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| The two types of brinelling are | true and false.
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| An aircraft tire’s maximum recommended static load is called the | ply rating.
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| The term “ply rating” refers to the | index of tire casing strength.
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| For tires 24 inches or greater outside diameter, the tire shall be removed when wear reaches the bottom of any tread groove for a continuous length of | 12 inches.
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| Matter is any substance that has mass and | occupies space.
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| Atoms are made up of | protons, neutrons, and electrons.
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| Electrons can be released from their outer orbit by all of the following forces except | cold
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| The greater the current flow through an electromagnet, the | greater the strength
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| To determine the direction a current-carrying conductor will move in a magnetic field, you should use the | left-hand rule for conductors.
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| Current that periodically reverses is called | alternating.
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| The term used to express a condition in which two moving objects are changing in or out of step is | phase.
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| The methods used to cool brushless alternating current (AC) generators are | engine oil and blast air
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| The underspeed switch (USS) on the 60/80 kilovolt ampere (KVA) generator constant speed drive (CSD) actuates at | 365 Hz.
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| The internal component of a battery that is a grid or framework, which supports the active chemical materials, is the | plate.
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| A 24-volt nickel-cadmium battery has | 19 cells.
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| The nickel-cadmium battery | electrolyte will appear to be low when the cells are partially discharged.
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| The component designed to convert 115/220-volt alternating current (AC) power into 28- volts (or less) direct current (DC) to operate the aircraft DC system is the | transformer-rectifier (T-R).
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| When measuring resistance on a multimeter, the letters OL indicate | infinity.
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