Landing Gears Section B FAA (Brakes)

The pressure source for power brakes is A- the main hydraulic system. B- a master cylinder. C- the power brake reservoir.

A- the main hydraulic system.

Internal leakage in a brake master cylinder unit can cause A- the pedal to slowly creep down while pedal pressure is applied. B- fading brakes. C- slow release of brakes.

A- the pedal to slowly creep down while pedal pressure is applied.

What is one effect a restricted compensator port of a master cylinder will have on a brake system? A-The reservoir will be filled by reverse flow. B- The restriction will cause slow release of the brakes. C-The brakes will operate normally.

B- The restriction will cause slow release of the brakes.

The left brake is dragging excessively on an airplane on which no recent brake service work has been performed. The most probable cause is A- excessively worn brake linings. B- low fluid supply in the brake system reservoir. C- foreign particles stuck in the master cylinder compensating port.

C- foreign particles stuck in the master cylinder compensating port.

Power boost brake systems are used on aircraft that have A- high landing speeds. B- low normal hydraulic system pressure. C- more than one brake assembly per axle.

C- more than one brake assembly per axle.

Aircraft brakes requiring a large volume of fluid to operate the brakes generally A- use power brake control valves. B- do not use brake system accumulators. C- use independent master cylinder systems.

A- use power brake control valves.

If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause? A-Deteriorated flexible hoses. B- Internal leakage in the master cylinder. C- Worn brake lining.

A-Deteriorated flexible hoses.

What type of valve is used in the brake actuating line to isolate the emergency brake system from the normal power brake control valve system? A- A shuttle valve. B- A bypass valve. C- An orifice check valve.

A- A shuttle valve.

How can it be determined that all air has been purged from a master cylinder brake system? A- By noting whether the brake is firm or spongy. B- By noting the amount of fluid return to the master cylinder upon brake release. C- By operating a hydraulic unit and watching the system pressure gauge for smooth, ful1 scale deflection.

A- By noting whether the brake is firm or spongy.

Debooster cylinders are used in brake systems primarily to A- reduce the pressure to the brake and increase the volume of fluid flow. B- relieve excessive fluid and ensure a positive release. C- reduce brake pressure and maintain static pressure.

A- reduce the pressure to the brake and increase the volume of fluid flow.

A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is A- the hydraulic master cylinder piston return spring is weak. B- air in the brake hydraulic system. C- the hydraulic master cylinder piston is sticking.

B- air in the brake hydraulic system.

A brake debooster valve is installed in systems where the high pressure of the hydraulic system (3,000 PSI) is used to operate brakes A-that are used on aircraft having high landing speeds. B-that are designed to work with lower pressure. C-that are used in conjunction with an antiskid system.

B-that are designed to work with lower pressure.

The purpose of a relief valve in a brake system is to A- prevent the tire from skidding. B- reduce pressure for brake application. C- compensate for thermal expansion.

C- compensate for thermal expansion.

When bleeding aircraft brakes, one of the indications that the air has been purged from the system is A-full brake pedal travel. B-partial brake pedal travel. C- firm brake pedals.

C- firm brake pedals.

In brake service work, the term "bleeding brakes" is the process of A- replacing small amounts of fluid in reservoir. B- withdrawing air only from the system. C- withdrawing fluid from the system for the purpose of removing air that has entered the system.

C- withdrawing fluid from the system for the purpose of removing air that has entered the system.

What would be the effect if the piston return spring broke in a brake master cylinder? A-The brake travel would become excessive. B- The brakes would become spongy. C-The brakes would drag.

C-The brakes would drag.

What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system? A-Permits the fluid to flow toward or away from the reservoir as temperature changes. B- Prevents fluid from flowing back to the reservoir. C-Assists in the master cylinder piston return.

A-Permits the fluid to flow toward or away from the reservoir as temperature changes.

Debooster valves are used in brake systems primarily to A-reduce the pressure and release the brakes rapidly. B- reduce brake pressure and maintain static pressure. C-ensure rapid application and release of the brakes.

A-reduce the pressure and release the brakes rapidly.

Lockout deboosters are primarily pressure reducing valves that A- cannot allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber. B- allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber. C- must be bled separately after brake bleeding has been completed.

B- allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber.

If a brake debooster is used in a hydraulic brake system, its position in the system will be A- in the brake pressure line between the brake pedal and the brake accumulator. B- between the brake control valve and the brake actuating cy1inder. C- between the pressure manifold of the main hydraulic system and the power brake control valve.

B- between the brake control valve and the brake actuating cylinder.

A pilot reports that the brake pedals have excessive travel. A probable cause is A- brake lining has oil or some foreign matter on the disks and linings. B- brake rotors have worn. C- lack of fluid in the brake system.

B- brake rotors have worn.

The removal, installation, and repair of landing gear tires by the holder of a private pilot certificate on an aircraft the pilot owns or operates is considered to be A- a violation of the Federal Aviation Regulations. B- preventive maintenance. C- a minor repair.

B- preventive maintenance.

Aside from an external leak in the line, what will cause parking brakes to creep continually to the OFF position? A-Insufficient hydraulic fluid in the reservoir. B- Glazed brake linings. C- An internal leak in the master cylinder

C- An internal leak in the master cylinder

The braking action of a Cleveland disk brake is accomplished by compressing a rotating brake disk between two opposite brake linings. How is equal pressure on both sides of the rotating disk assured? A-By allowing the brake rotor to float to automatically equalize as pressure is applied to the rotor. B- By allowing the brake linings to automatically equalize as pressure is applied to the rotor. C- By allowing the caliper to float to automatically equalize as pressure is applied to the rotor.

C- By allowing the caliper to float to automatically equalize as pressure is applied to the rotor.

Which statement is true with respect to an aircraft equipped with hydraulically operated multiple disk type brake assemblies? A-There are no minimum or maximum disk clearance checks required due to the use of self compensating cylinder assemblies. B- No parking brake provisions are possible for this type of brake assembly. C- Do not set parking brake when brakes are hot.

C- Do not set parking brake when brakes are hot.