block 9

Exposure to and/or storage near which of the following is considered harmful to aircraft tires? 1. Low humidity. 2. Fuel. 3. Oil. 4. Ozone. 5. Helium. 6. Electrical equipment. 7. Hydraulic fluid. 8. Solvents.

• 2, 3, 4, 5, 6, 7, 8.

• 1, 2, 3, 5, 7, 8.

• 2, 3, 4, 6, 7, 8.

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.

In brake service work, the term 'bleeding brakes' is the process of

• withdrawing air only from the system.

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

• replacing small amounts of fluid in reservoir.

To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact,

• various types of valves or orifices are used which restrict the reverse fluid flow.

• the metering pin gradually reduces the size of the orifice as the shock strut extends.

• the air is forced through a restricted orifice in the reverse direction.

Aside from an external leak in the line, what will cause parking brakes to continually bleed off pressure?

• An internal leak in the master cylinder.

• Insufficient hydraulic fluid in the reservoir.

• Glazed brake linings.

Why do most aircraft tire manufacturers recommend that the tubes in newly installed tires be first inflated, fully deflated, and then reinflated to the correct pressure?

• To allow the tube to position itself correctly inside the tire.

• To eliminate all the air between the tube and the inside of the tire.

• To test the entire assembly for leaks.

After performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is usually necessary to

• conduct a flight test.

• re-inspect the area after the first flight.

• make an operational check with the aircraft on jacks.

Why do tire and wheel manufacturers often recommend that the tires on split rim wheels be deflated before removing the wheel from the axle?

• To relieve the strain on the wheel retaining nut and axle threads.

• As a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened.

• To remove the static load imposed upon the wheel bearings by the inflated tire.

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?

• By allowing the brake rotor to float to automatically equalize as pressure is applied to the rotor.

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

• By allowing the brake linings to automatically equalize as pressure is applied to the rotor.

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

• Single-disk spot type.

• Single-servo type.

• Expander-tube type.