HIDROGENO

Which part of the aircraft has to absorb more than 5,000 brake horsepower per unit?. Tail skid. Brake. Landing gear. Propeller.

How did early aircraft achieve stopping power before the invention of modern brakes?. Brakes. Spoilers. Tail skid. Reverse thrust.

What type of brakes were first adopted from automobiles for early aircraft?. Disk brakes. Drum-and-shoe brakes. Expander tube brakes. Duo-servo brakes.

Which component was used in early brakes to increase friction against a rotating drum?. Hydraulic fluid. Metal shoe with asbestos lining. Synthetic rubber tube. Coil springs.

What type of brakes was replaced by non-servo brakes on airplanes?. Drum-and-shoe brakes. Expander tube brakes. Duo-servo brakes. Servo brakes.

How do modern disk brakes maintain their braking force throughout the stopping procedure?. Using hydraulic pressure. Using synthetic rubber tubes. By increasing the drum size. By maintaining constant friction area.

Which type of brakes is used primarily for maneuvering in smaller aircraft?. Duo-servo brakes. Single-disk brakes. Multiple-disk brakes. Drum-and-shoe brakes.

How do expander tube brakes function when hydraulic fluid is pressurized?. The drum rotates. The tube contracts. The tube expands. The brake shoe moves.

In multiple-disk brakes, what is the function of the stationary disks?. To generate hydraulic pressure. To dissipate heat. To rotate between the keyed disks. To remain attached to the torque tube.

What problem do drum-and-shoe brakes face due to heat generation?. Hydraulic fluid loss. Brake fluid leakage. Brake fading. Increased braking force.

What material is used in modern single-disk brake linings due to asbestos hazards?. Metal. Organic friction material. Synthetic rubber. Ceramic.

What component in single-disk brakes applies the clamping action to the disk?. Hydraulic piston. Tail skid. Expander tube. Brake shoe.

How are single-disk brakes typically attached to smaller general aviation aircraft?. Bolted to the propeller. Bolted rigidly to the wheel. Floating on a wheeled dolly. Attached to the tail skid.

What is the primary function of the caliper in single-disk brakes?. To rotate with the wheel. To apply a clamping action to the disk. To generate hydraulic pressure. To prevent the aircraft from moving.

How can the capacity of single-disk brakes be increased?. By reducing the wheel size. By adding more wheels. By adding additional cylinders and lining pucks. By decreasing hydraulic pressure.

What characteristic of organic friction material makes it suitable for brake linings?. Low cost. High coefficient of friction. Lightweight. Easy to manufacture.

Why was asbestos replaced in the manufacturing of brake linings?. Because it was too expensive. Due to its poor thermal characteristics. Because of manufacturing hazards. Because it wore out too quickly.

What type of tire led to the development of non-fading brakes that fit into small diameter wheels?. Low-profile tire. Doughnut or high-flotationtype tire. Radial tire. Bias-ply tire.

What material was originally used to plate the rotating disks in early multiple-disk brakes?. Sintered copper. Pure carbon. Bronze or copper-plated steel. Aluminum.

What component forces the pressure plate against the disk stack in modern multiple-disk brakes?. Hydraulic fluid. Single annular piston. Series of small pistons. Automatic adjuster.

How do modern multiple-disk brakes compensate for disk wear?. Manual adjustment. Increasing hydraulic pressure. Using automatic adjusters. Adding more disks.

What is the primary advantage of carbon brakes over traditional multiple-disk brakes?. Higher torque. Reduced weight and better heat absorption. Lower cost. Simpler design.

On which type of aircraft are carbon brakes primarily used today?. Commercial airliners. General aviation aircraft. Cargo planes. Higher performance military aircraft.

What is bonded to the steel rotating disks in modern multipledisk brakes for better friction?. Asbestos. Organic friction material. Sintered copper and iron-based material. Pure carbon.

What material is used to make the disk in a single-disk brake with organic lining?. Aluminum. Forged steel. Magnesium alloy. Bronze.

What is the function of anti-rattle clips in the disk of a singledisk brake?. To reduce friction. To prevent the disk from moving out. To hold the disk centered. To increase braking force.

What type of housing is used in single-disk brakes with organic linings?. Cast iron. Cast aluminum or magnesium alloy. Forged steel. Carbon fiber.

How is the piston cavity sealed to prevent hydraulic fluid leakage?. With a metal cap. With a rubber gasket. With an O-ring seal. With a plastic plug.

How does the housing design allow for the same part to be used on both sides of the aircraft?. By using reversible linings. By using a symmetrical design. By using identical passages for fittings and bleeder plugs. By using dual pistons.

What particles may be embedded in the organic linings to provide the required friction characteristics?. Brass or copper. Iron or steel. Asbestos. Carbon fiber.

What material is no longer used in modern organic composition linings due to health hazards?. Brass. Copper. Asbestos. Steel.

What do automatic adjusters in single-disk brakes maintain?. Hydraulic pressure. Constant clearance between lining and disk. Piston alignment. Disk rotation.

How is the pin in the piston held in place in brakes with automatic adjusters?. By a friction lock. By hydraulic pressure. By a metal clamp. By an O-ring seal.

What happens to the pin when the linings of an automatic adjusting brake wear?. It moves the piston back. It pulls through the friction collar. It releases hydraulic pressure. It clamps the disk more tightly.

What component prevents the stationary disks from rotating in a multiple-disk brake system?. Brake housing. Torque tube. Pressure plate. Back plate.

What material is commonly used to cast the housing of multiple-disk brakes?. Steel. Titanium. Aluminum or magnesium alloy. Carbon fiber.

How do the pistons in the brake housing contribute to the braking action?. By generating hydraulic pressure. By cooling the disks. By forcing the pressure plate against the disk stack. By adjusting the torque tube.

What feature in the housing ensures the flow of hydraulic fluid to the cylinders?. External pipes. Drilled passages. Separate reservoirs. Flexible hoses.

What is the purpose of the A and B system in some brake housings?. To increase braking power. To provide a backup hydraulic system. To reduce wear on disks. To simplify maintenance.

How do return springs and automatic adjusters function in the brake housing?. They increase hydraulic pressure. They prevent disk warping. They pull the pressure plate back from the disk stack each time the brake is released. They cool the brake components.

What issue can arise if there is not enough friction in the torqueless bushing of an automatic adjuster?. The brake will overheat. The return spring will pull the pin back through the adjuster. The piston will not move. The disk will warp.

What component is attached to the face of each piston to minimize heat transfer?. Teflon backup ring. Composition insulator. Hydraulic fluid. Steel washer.

How does the return system in multiple-disk brakes maintain constant clearance between the disks?. By adjusting hydraulic pressure. By using automatic adjusters. By increasing piston force. By rotating the torque tube.

What is the function of the Belleville washer in the return system of some brake housings?. To increase friction. To return the pressure plate. To prevent fluid leakage. To clamp the disk stack.

What prevents the pressure plate from rotating in a multipledisk brake system?. Hydraulic fluid. Slots in the inner circumference. Friction lock. Aluminum housing.

What material are the stationary disks in multiple-disk brakes typically made of?. Steel. Aluminum. Carbon fiber. Magnesium.

How are the rotating disks driven in a multiple-disk brake system?. By hydraulic pressure. By friction. By a tang fitting into a slot in the wheel or a key attached to the wheel. By the back plate.

What is bonded to the surface of rotating disks to provide a special friction surface?. Aluminum. Asbestos. Sintered material. Carbon fiber.

What replaced the mechanical cams to increase the pressure applied to the brake linings in early drum-and-shoe brakes?. Flexible steel cables. Hydraulic cylinders. Diaphragm-type systems. Belleville washers.

What type of fluid was used in early hydraulic brakes with natural rubber seals?. Mineral oil. Vegetable-base fluid. Synthetic fluid. Silicone-based fluid.