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2a531-2
2A531 CDC'S volume 2
| Question | Answer |
|---|---|
| The maintenance stand with an adjustable height of 13 to 20 feet is the | b-2 |
| Of the following, the maintenance stand that is a scissor-type is the | b-4 |
| The type of jack normally used to change a tire on the aircraft is the | axle |
| The boiling point of liquid oxygen (LOX) is | –297°F |
| 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. |
| The high-pressure pump provides a hydraulic filler pressurization unit with a maximum pressure of | 3,000 psi. |
| The model 4000 engine trailer can support a maximum load of | 8,000 pounds. |
| The usable pressure range, as measured in pounds per square inch (psi), of the MC–1A air compressor is | 0–3,200. |
| The MC–2A air compressor is capable of delivering air at a maximum pressure, measured in pounds per square inch (psi), of | 250 |
| The H–1 heater has an adjustable heat output that ranges from | 150°F to 280°F. |
| The stationary, skid-mounted power unit that produces aircraft electrical power for use in shops and hangars is the | MD–4. |
| 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. |
| The hydraulic systems on the MK–3A–1 hydraulic test stand are designated | No. 1 and No. 2. |
| The amount of fluid the MJ–2A reservoir holds is | 27 gallons. |
| A Class I MB–2 tractor weighs | 40,000 pounds. |
| 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. |
| The most common type of material used for fuselage construction is | aluminum alloy. |
| The wing components that provide strength and contour shape to the wing are the | ribs. |
| The main difference between inspection plates and panels is | size. |
| A cracked radome could cause | microwave distortion. |
| The reference locations, which are in the vertical direction measured from a reference datum that is usually well below the aircraft, are called | waterlines. |
| The category of –21 equipment used for life support and crew comfort is | III |
| The effective range of a fully charged handheld fire extinguisher is | 20 feet. |
| The first practical laminated composite formed was | plywood. |
| A barometer is designed to measure pressure in | inches of mercury. |
| Atmospheric pressure at sea level is | 14.7 pounds per square inch |
| The force that acts parallel to the relative wind is | drag. |
| The axis that extends lengthwise through the fuselage from the nose to the tail is the | longitudinal. |
| The axis that extends crosswise from wing tip to wing tip is the | lateral. |
| Movement about the vertical axis is called | yaw. |
| The flight control located on the longitudinal control surface is the | elevator. |
| The type of flight control system that allows the pilot to control the aircraft if hydraulic pressure is lost is | manual. |
| When making a right turn, the relative position of the ailerons is the right aileron | up, left aileron down. |
| The flight control surfaces used to make an aircraft climb or dive are | elevators. |
| The type of flap normally incorporated on bomber and cargo type aircraft is | fowler |
| Aircraft have trim systems to | correct minor deviations in flight attitude. |
| The law that states, “the distortion of any elastic body is proportional to the distorting force” is known as | Hook’s Law. |
| 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. |
| Pascal’s Law applies to | confined fluids at rest. |
| Among the first to study the compressibility of gases was | Boyle |
| 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. |
| 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 |
| When an 8-square-inch piston moves 5 inches within a cylinder, the volume of liquid displaced will be | 40 cubic inches. |
| The principle, which states that as the velocity of a gas or liquid increases, pressure decreases, is | Bernoulli’s. |
| As fluid enters the narrow portion of a venturi, | it accelerates. |
| When referring to hydraulic hand pumps, double-action means | fluid-flow is created with each stroke of the pump handle |
| Variable-volume pumps do not require a separate pressure-regulating device in the system because | they have an integral compensator. |
| Cooler operation in a variable-volume hydraulic pump is provided by | creep plates |
| In the Stratopower variable-volume pump, the pistons are held in contact with the cam plate by the | nutating plate. |
| An accumulator’s piston is installed with the | hollow end toward the air side of the accumulator |
| The size of one micron is four | millionths of an inch |
| If a filter is rated at 10 microns nominal, it | may allow some particles 10 microns or larger to get through. |
| Hydraulic manifolds are used in a hydraulic system to provide a location where the | common fluid lines can come together. |
| The pneudraulic system component that uses a single-acting actuating cylinder is the | brake assembly. |
| What pneudraulic system component uses a double-acting balanced actuating cylinder? | Nosewheel steering |
| Some aircraft manufactures use the term “power control cylinders” when referring to | tandem actuators. |
| The pressure at which the relief valve ball is slightly unseated is called the | cracking pressure |
| The major advantage of the manual slide-type hydraulic selector valve is its | metering ability. |
| The difference between a selector valve and a servo valve is the | servo valve will control fluid-flow. |
| The purpose of a hydraulic system check valve is to | allow flow in only one direction |
| Another name for a flapper check valve is | gate check valve. |
| 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. |
| The four major sections of a basic hydraulic system are | supply, pressure, return, and auxiliary |
| The basic units of a hydraulic hand pump system are the | 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 |
| A relief valve is installed in a variable-volume hydraulic pump to | relieve pressure if the pump compensator fails. |
| In most hydraulic subsystems, the actuating units are connected | in parallel |
| The shock strut component that controls the rate of fluid-flow through the orifice is the | metering pin. |
| The purpose of the torsion links on a main landing gear is to | prevent the inner cylinder from rotating within the outer cylinder |
| The motion of the landing gear control lever is transmitted to the selector valve | by a cable system. |
| Landing gear safety switches are actuated by | torsion links. |
| The two most common types of shimmy dampers used in nose wheel steering are the | piston and vane. |
| The purpose of aircraft brakes is to | retard motion using friction. |
| The purpose of deboosters is to | reduce braking pressure |
| The two types of emergency brake systems are | hydraulic and pneumatic. |
| The purpose of the antiskid system is to | prevent wheel skid by releasing pressure from the skidding wheel. |
| Split wheels are balanced | individually by halves. |
| An airtight seal is maintained between split wheel halves by use of | an O-ring seal |
| The type of bearings used on aircraft wheels is | tapered roller. |
| The bearing cone of an aircraft wheel bearing is also called the | inner race. |
| The kinds of pitting that affect bearings are | corrosive and mechanical |
| The two types of brinelling are | true and false. |
| An aircraft tire’s maximum recommended static load is called the | ply rating. |
| The term “ply rating” refers to the | index of tire casing strength. |
| 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. |
| 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 |
| The greater the current flow through an electromagnet, the | greater the strength |
| To determine the direction a current-carrying conductor will move in a magnetic field, you should use the | left-hand rule for conductors. |
| Current that periodically reverses is called | alternating. |
| The term used to express a condition in which two moving objects are changing in or out of step is | phase. |
| The methods used to cool brushless alternating current (AC) generators are | engine oil and blast air |
| The underspeed switch (USS) on the 60/80 kilovolt ampere (KVA) generator constant speed drive (CSD) actuates at | 365 Hz. |
| The internal component of a battery that is a grid or framework, which supports the active chemical materials, is the | plate. |
| A 24-volt nickel-cadmium battery has | 19 cells. |
| The nickel-cadmium battery | electrolyte will appear to be low when the cells are partially discharged. |
| 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). |
| When measuring resistance on a multimeter, the letters OL indicate | infinity. |
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