CDC 2AX5X Volume 2

Variable-volume pumps do not require a separate pressure-regulating device in the system because they have an integral compensator. This means that the pump itself is able to regulate and control the pressure within the system without the need for an additional device. The integral compensator adjusts the pump's displacement in response to changes in system pressure, ensuring that the desired pressure level is maintained. This eliminates the need for a separate pressure-regulating device, simplifying the system design and reducing the overall cost and complexity.

Engine mounts are typically made of corrosion-resistant steel because it is able to withstand high forces. The given answer range of 180000 to 200000 psi indicates the pressure per square inch that the steel can handle. This range suggests that the engine mounts are designed to endure significant stress and maintain their structural integrity under heavy loads and vibrations. This ensures the stability and safety of the engine within the vehicle.

In a pneudraulic system, flow is typically produced by a piston pushing the fluid. A pneudraulic system combines both pneumatic and hydraulic principles, using compressed air to generate mechanical force. The piston, driven by the compressed air, pushes the fluid through the system, creating flow. This flow is essential for the proper functioning of the system, allowing it to perform various tasks such as actuating cylinders or controlling valves.

The snubbing mechanism slows the free fall of the main landing gear during the emergency extension sequence. This mechanism is designed to control the speed of the gear's descent, preventing it from dropping too quickly and potentially causing damage or instability. By gradually releasing hydraulic pressure, the snubbing mechanism ensures a controlled and safe deployment of the landing gear during emergencies.

Electromagnetic devices that can detect magnetically conductive metal targets on landing gears are referred to as proximity sensors. These sensors are designed to sense the presence or absence of an object within a specific range without physical contact. They are commonly used in various industries for automation, safety, and control applications. Proximity sensors work by emitting an electromagnetic field and detecting changes in that field caused by the presence of a metal target. This technology makes them ideal for detecting the position or proximity of objects in a reliable and non-contact manner.

The torsion links on a main landing gear are designed to prevent the inner cylinder from rotating within the outer cylinder. This is important because if the inner cylinder were allowed to rotate freely, it could lead to instability and potential damage to the landing gear system. By preventing this rotation, the torsion links help to maintain the structural integrity and stability of the landing gear during operation.

Drag is the force that acts parallel to the relative wind. When an object moves through a fluid (such as air or water), drag is the resistance force that opposes the motion of the object. It is caused by the interaction between the object and the fluid molecules. In the context of aerodynamics, drag is an important factor that affects the performance and efficiency of an aircraft. It is necessary to minimize drag in order to increase speed and reduce fuel consumption.

An electrically controlled solenoid valve has the advantage of reduced weight compared to other types of valves. This is because solenoid valves do not require additional mechanical components such as levers or linkages to operate. Instead, they use an electromagnetic coil to control the valve's opening and closing. This compact design allows for a lighter overall weight, making it a preferred choice in applications where weight is a concern, such as in aerospace or automotive industries.

Tapered roller bearings are used on aircraft wheels because they can handle both radial and axial loads. They are designed to withstand the high speeds and heavy loads experienced during landing and takeoff. The tapered shape of the rollers allows for even distribution of the load, reducing friction and increasing durability. This type of bearing also provides stability and precision, ensuring smooth and efficient operation of the aircraft wheels.

The correct answer is cantilever. Cantilever wing design refers to a wing structure that is self-supporting and does not require external bracing or struts. It is a common design used in modern military aircraft as it provides better aerodynamic efficiency and reduces drag. The cantilever design allows for a sleeker and more streamlined aircraft, improving its performance and maneuverability.

An actuating cylinder is designed to convert fluid pressure into a mechanical force. This means that when fluid is applied to the cylinder, it generates a force that can be used to move or actuate other mechanical components. The cylinder uses the pressure of the fluid to create a linear or rotary motion, which in turn generates the mechanical force. This force can be used for various purposes, such as moving objects, operating machinery, or performing mechanical tasks.

A pneudraulic system component that uses a double-acting balanced actuating cylinder is the nosewheel steering. This component allows the pilot to control the direction of the aircraft during ground operations. The double-acting cylinder ensures that the steering mechanism can move in both directions, providing balanced and precise steering control.

The correct answer is that split wheels are balanced individually by halves. This means that each half of the split wheel is balanced separately to ensure that the entire assembly is balanced. This is done using a self-balancing system, which takes into account the weight distribution of each half of the wheel and makes adjustments as necessary. By balancing the wheels individually by halves, any imbalances or vibrations can be minimized, resulting in a smoother and safer driving experience.

A hydraulic reservoir serves multiple purposes. It replenishes fluid in the system, ensuring that an adequate amount of fluid is available for proper operation. It also allows for thermal expansion, which is important as hydraulic systems generate heat during operation. The reservoir provides a space for the fluid to expand without causing damage or pressure build-up. Additionally, the reservoir acts as a means of bleeding air from the system, ensuring that the hydraulic fluid remains free from air bubbles that could affect its performance.

The correct answer is 8,000 rpm. The output of the csd (constant speed drive) used to drive a 60/80 kilovolt ampere generator is approximately 8,000 rpm.

One micron is equal to one millionth of an inch. This means that if we divide an inch into one million equal parts, each part would be one micron in size. Therefore, the correct answer is "millionths of an inch."

A shunt type motor has low starting torque and good speed regulation. This means that it does not have a strong initial force to start rotating, but once it starts, it can maintain a consistent speed even under varying loads. This is because the field winding is in parallel (shunt) with the armature, allowing the motor to regulate its speed effectively.

A 24-volt nickel-cadmium battery typically consists of 12 cells, each producing approximately 2 volts. However, in this case, the battery has 19 cells, which means each cell is producing slightly less than 2 volts. The total voltage of the battery is still 24 volts, but it is achieved by having more cells with slightly lower voltage output.

The major advantage of the manual slide-type hydraulic selector valve is its metering ability. This means that the valve can control the flow rate of hydraulic fluid, allowing for precise and controlled movement of hydraulic actuators. This is particularly useful in applications where smooth and precise movement is required, such as in industrial machinery or heavy equipment. The metering ability of the valve allows for better control over the speed and force of the hydraulic system, resulting in improved efficiency and performance.

Deboosters are devices used in braking systems to reduce the braking pressure. When the brake pedal is pressed, the debooster reduces the pressure before it reaches the wheel cylinders or brake calipers. This is done to ensure that the braking force applied is not excessive, preventing wheel lock-up and allowing for better control of the vehicle during braking. By reducing the braking pressure, deboosters help to optimize braking performance and improve overall safety.

A standpipe in a reservoir is designed to reserve fluid for the emergency pump. In case of any unforeseen circumstances or power failure, the emergency pump can utilize the fluid stored in the standpipe to continue functioning. This ensures that there is a backup fluid supply available to maintain the operation of the system during emergencies, preventing any disruption or damage.

The fixed vertical surface of the empennage is called the fin. The fin is responsible for providing stability and directional control to the aircraft. It helps in preventing yawing motion and keeps the aircraft flying straight. The fin works in conjunction with the rudder, which is a movable control surface attached to the fin. The rudder is used to control the yawing motion of the aircraft, while the fin provides the necessary stability.

The correct answer is "Hollow end toward the air side of the accumulator." This means that the piston should be installed with its hollow end facing towards the side of the accumulator where air is present. This is important because the hollow end allows for the movement of air, which is necessary for the proper functioning of the accumulator. By installing the piston in this manner, it ensures that the air can freely flow through the piston and the accumulator can operate effectively.

The correct answer is plate. A battery's internal component that supports the active chemical materials is called a plate. The plate acts as a framework or grid that holds the active materials, allowing for the chemical reactions that generate electricity to occur.

In hydraulic hand pumps, double-action means that fluid-flow is created with each stroke of the pump handle. This means that every time the pump handle is moved, fluid is forced through the system, allowing for a continuous flow of fluid. This is different from other types of pumps where fluid-flow may only be created with every other stroke or at a different interval. With a double-action hydraulic hand pump, fluid-flow is consistent and occurs with each stroke of the pump handle.

The nutating plate holds the pistons in contact with the cam plate in the Stratopower variable-volume pump. This plate moves in a circular motion, causing the pistons to reciprocate and maintain contact with the cam plate. The nutating plate ensures that the pistons are properly aligned and allows for efficient pumping action.

Creep plates provide for cooler operation in a Stratopower variable-volume hydraulic pump. Creep plates are designed to allow a small amount of fluid to bypass the pump's main control valve, which helps in reducing the heat generated during operation. This bypassed fluid is then directed to the tank, allowing it to cool down before being recirculated through the system. This mechanism helps to maintain lower temperatures in the pump, preventing overheating and ensuring optimal performance.

The USS on the 60/80 KVA generator CSD actuates at 365 Hz.

Vent holes prevent pressure buildup and separation of cord plies or tread rubber on an aircraft tire. These holes allow air to escape from the tire, preventing excessive pressure from building up. By releasing the trapped air, vent holes help to maintain the integrity of the tire structure and prevent any potential damage or separation of the cord plies or tread rubber.

The centering switch prevents the lock solenoid from energizing when the nose landing gear is off center. This switch is designed to detect the position of the landing gear and ensure that it is properly centered before allowing the lock solenoid to be energized. If the landing gear is not in the correct position, the centering switch will prevent the solenoid from engaging, thus preventing any potential safety hazards or damage to the aircraft.

The correct answer is engine oil and blast air. AC generators require cooling to prevent overheating. Engine oil is used to lubricate the moving parts of the generator and also acts as a coolant by absorbing and dissipating heat. Blast air is used to provide additional cooling by blowing air over the generator, helping to remove heat from the system. This combination of engine oil and blast air effectively cools the AC generator and ensures its proper functioning.

When making a right turn, the relative position of the ailerons is that the right aileron trailing edge is up and the left aileron trailing edge is down. This configuration helps to increase the lift on the right wing and decrease the lift on the left wing, allowing the aircraft to roll and turn to the right. By raising the trailing edge of the right aileron and lowering the trailing edge of the left aileron, the pilot can effectively control the bank angle and maintain stability during the turn.

The primary force an airfoil has to defeat is weight. Weight is the force exerted by gravity on an object and acts vertically downward. In order for an airfoil to generate lift and overcome the force of weight, it must create a pressure difference between the upper and lower surfaces of the wing. This pressure difference creates an upward force, known as lift, which counteracts the weight of the aircraft. Drag and thrust are also important forces in aviation, but they are not the primary force that an airfoil has to defeat.

The main parts of an aircraft tire are the cord body and beads. The cord body provides strength and support to the tire, while the beads help to secure the tire to the wheel. Both of these components are essential for the proper functioning and stability of the tire during flight. The tread and sidewall, valve core, and vent holes are also important parts of an aircraft tire, but they are not the main components as mentioned in the question.

Turbulence in a hydraulic line creates resistance and loss of energy. When fluid flows through a hydraulic line, turbulence occurs when there is a disruption in the smooth flow of the fluid. This disruption causes the fluid to move in an irregular and chaotic manner, resulting in increased resistance to flow. As a result, energy is lost in overcoming this resistance, leading to a decrease in the overall efficiency of the hydraulic system.

A pneudraulic system is a combination of pneumatic and hydraulic systems. In this system, a single-acting actuating cylinder is used to convert fluid pressure into linear motion. The brake assembly is a component of the pneudraulic system that uses a single-acting actuating cylinder. When the brake pedal is pressed, fluid pressure is applied to the actuating cylinder, causing the brake pads to press against the brake rotor or drum, thereby stopping the wheel's rotation. This allows for effective braking and control of the aircraft.

Brake fade refers to a gradual loss of braking action. This can occur when the brakes overheat, causing a decrease in their effectiveness. As the brakes heat up, the friction between the brake pads and the rotors or drums decreases, resulting in a reduced braking force. This loss of braking power can be dangerous and can lead to longer stopping distances and difficulty in controlling the vehicle.

When the camshaft is rotated, it unseats one pressure poppet and one return poppet in a manual poppet-type selector valve. This means that these two poppets are lifted or moved away from their seated position, allowing fluid to flow through the valve. The other options mentioned in the question either involve seating all four poppets, seating both pressure poppets, or unseating all four poppets, which are not the correct positions for the valve when the camshaft is rotated.

Thermal relief plugs prevent tire explosion from excessive heat buildup. These plugs are designed to release pressure and heat from the tire, allowing it to cool down and preventing the buildup of excessive heat that could lead to an explosion. Vent holes, blowout caps, and wheel valve stems do not serve this specific purpose of relieving thermal pressure in the tire.

The hydraulic manifold in a hydraulic system serves as a central point where the common fluid lines can come together. This allows for the efficient distribution of hydraulic fluid to various components of the system. By connecting the common fluid lines at the manifold, it ensures that the fluid is properly directed to the desired locations, enabling the system to function effectively.

Hydraulic selector valves are typically controlled by solenoids. Solenoids are electromechanical devices that use an electromagnetic coil to generate a magnetic field, which in turn moves a plunger or valve to control the flow of fluid in a hydraulic system. Therefore, solenoids are commonly used to position hydraulic selector valves.

Adjusters automatically compensate for brake wear on the segmented rotor brake. As the brake pads wear down over time, the adjusters ensure that the proper clearance is maintained between the pads and the rotor. This helps to maintain consistent braking performance and prevents excessive wear on the brake components.

The motion of the landing gear control lever is transmitted to the selector valve through a cable system. This means that when the lever is moved, it pulls or pushes on a cable, which in turn moves the selector valve to the desired position. This cable system allows for a direct and mechanical transfer of motion, ensuring that the landing gear can be controlled accurately and reliably.

The basic units of a hydraulic hand pump system are the reservoir, pump, actuator, and manual shutoff valve. The reservoir holds the hydraulic fluid, the pump generates the pressure to move the fluid, the actuator converts the fluid pressure into mechanical force, and the manual shutoff valve controls the flow of fluid. These components work together to create a hydraulic system that can generate and control mechanical power.

A permanent magnet is produced from a material with high reluctance and low permeability because these properties allow the material to resist the flow of magnetic flux and retain its magnetism over time. High reluctance means that the material resists the magnetic field, preventing it from easily passing through. Low permeability means that the material does not easily allow magnetic flux to pass through it. This combination of properties ensures that the magnet retains its magnetism for a long period of time.

The bearing cone of an aircraft wheel bearing is called the inner race. The inner race is the part of the bearing that rotates with the axle, while the outer race remains stationary. The roller elements are located between the inner and outer races, allowing for smooth and efficient rotation of the wheel. The inner race is designed to withstand the load and stress of the rotating wheel, making it an essential component of the bearing system.

When pressure in a hydraulic system with a variable-volume pump increases, the fluid-flow decreases. This is because as the pressure increases, it becomes more difficult for the fluid to flow through the system. The increased pressure creates resistance, causing the fluid flow to slow down or decrease.

A servo valve controls fluid-flow, whereas a selector valve is a valve with four ports. The given answer states that the difference between a selector valve and a servo valve is that a servo valve controls fluid-flow. This implies that a selector valve may or may not control fluid-flow, but a servo valve specifically does.

The elevator is a longitudinal control surface that is responsible for controlling the pitch of an aircraft. It is located on the horizontal stabilizer at the rear of the aircraft and can be moved up or down. When the elevator is raised, the nose of the aircraft pitches up, and when it is lowered, the nose pitches down. This control surface is crucial for maintaining the aircraft's stability and controlling its altitude during flight.

The correct answer is "in response to pressure demand and the suction effect of the pump." This means that the reservoir supplies hydraulic fluid to the hand pump based on the demand for pressure and the suction effect created by the pump. The hydraulic fluid is not only supplied by gravity or solely by the suction effect, but it is also influenced by the pressure demand from the system.