Aircraft Brakes

What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system?

• Assists in the master cylinder piston return

• Prevents fluid from flowing back to the reservoir

• Permits the fluid to flow toward or away from the reservoir as temperature changes

If an airplane equipped with master cylinders and single disc brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is?

• The master cylinder one way cup is leaking

• Worn brake linings

• Worn brake disc causing excessive clearance between the notches on the perimeter of the disc and the splines or keys on the wheel

Internal leakage in a brake master cylinder unit can cause the pedal to slowly creep down when pedal pressure is applied, this is known as?

• Soft brakes

• Hard brakes

• Fading brakes

How can it be determined that all air has been purged from a master cylinder brake system?

• By operating a hydraulic unit and watching the system pressure gauge for smooth, full scale deflection

• By noting whether the brake is firm or spongy

• By noting the amount of fluid return to the master cylinder upon brake release

What is one effect a restricted compensator port of a master cylinder will have on a brake system?

• The brakes will operate normally

• The reservoir will be filled by reverse flow

• The restriction will cause dragging brakes

What would be the effect if the piston return spring broke in a brake master cylinder?

• The brakes would become spongy

• The brake travel would become excessive

• The brakes would drag

If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause?

• Worn brake lining

• Internal leakage in the master cylinder

• Deteriorated flexible hoses

Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation?

• Single disc spot type

• Single servo type

• Expander tube type

What would be the cause of brake chatter when brake pressure is applied?

• Wrong type of brake pads

• Glazed brake pads

• Broken brake pads

What method is used when bleeding a brake system using a pressure pot?

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