Steel Rotors in Automotive Engineering

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What is the purpose of measuring the amount that the indicator pin protrudes with the brakes applied?

To determine if new linings are required (correct)
To increase the frictional heat
To calculate the weight of the aircraft
To adjust the pressure plate retraction

Why are carbon brakes commonly used in high performance and air carrier aircraft?

Because they are approximately forty percent lighter than conventional brakes (correct)
Because they are cheaper to manufacture
Because they are heavier than conventional brakes
Because they produce less frictional heat

What material is used to construct the brake rotors in carbon brakes?

Copper
Carbon fiber (correct)
Aluminum
Steel

How does the weight of carbon brakes compare to conventional brakes?

Carbon brakes are approximately forty percent lighter than conventional brakes (C) Signup and view all the answers

What is a key advantage of carbon fiber discs over sintered steel rotors?

They can withstand temperatures fifty percent higher than steel component brakes (A) Signup and view all the answers

Why does the text suggest consulting the manufacturer’s maintenance information regarding wear indicators?

To ensure wear indicators are read correctly (A) Signup and view all the answers

What material is typically used in creating the rotor contact surface?

Sintered metal (A) Signup and view all the answers

Why are rotors often segmented or slit instead of being solid?

To prevent warping (C) Signup and view all the answers

What is the purpose of retraction spring assemblies with auto clearance adjusters in segmented multiple-disc brakes?

To provide clearance for the wheel to turn unimpeded (B) Signup and view all the answers

In the context of segmented multiple-disc brakes, what is the function of the pin grip assembly?

Limiting the amount of return equal to brake lining wear (D) Signup and view all the answers

How do retraction mechanisms behave in response to brake pressure being applied?

Move out but are limited in return by a ball in a tube (C) Signup and view all the answers

What type of aircraft uses the brake assembly illustrated in Figure 13-89?

Boeing 737 (A) Signup and view all the answers

What is the technician advised to inspect whenever possible in the landing gear area?

Wheels, tires, and brakes (A) Signup and view all the answers

Why is a missing bolt on a wheel a cause for immediate action?

It poses a safety risk due to potential stresses on the wheel halves (D) Signup and view all the answers

What should be examined to ensure it is secure along with the wheel hub dust cap?

Anti-skid sensor (D) Signup and view all the answers

Why is it important to inspect thermal plugs in aircraft wheels?

To ensure no fusible alloy melting has occurred (A) Signup and view all the answers

What action should be taken for a wheel with thermal plugs that have allowed pressure loss in the tire?

Remove the wheel assembly for inspection (A) Signup and view all the answers

Why is axle nut torque emphasized in aircraft wheel installation?

Of extreme importance in ensuring wheel safety (B) Signup and view all the answers

What keeps pressurized fluid in the working chambers of a vane-type shimmy damper?

Replenishing piston (A) Signup and view all the answers

What is the purpose of the rubber piston in a non-hydraulic shimmy damper?

To rub against the housing for damping (A) Signup and view all the answers

What is included in the vane-type shimmy damper for thermal compensation of the orifice size?

Fluid port (A) Signup and view all the answers

In a non-hydraulic shimmy damper, what does the rubber piston press out against when receiving shimmy motion?

Inner diameter of the damper housing (D) Signup and view all the answers

What component provides an indication of fluid level in a vane-type shimmy damper?

Indicator rod (D) Signup and view all the answers

What type of damping does a non-hydraulic shimmy damper rely on?

Surface-effect damping (D) Signup and view all the answers

What is the main function of a brake metering valve in an aircraft power brake system?

To facilitate graduated brake pressure control (C) Signup and view all the answers

How is the amount of hydraulic fluid supplied to the brakes by the brake metering valve determined?

In direct relation to the pressure applied to the pedal and the displacement of the slide/spool (B) Signup and view all the answers

What is the purpose of an autobrake in an aircraft power brake system?

To automatically apply brakes in certain conditions (D) Signup and view all the answers

Why are power brake systems in large aircraft constructed with redundancy?

As a safety measure in case of hydraulic system failure (C) Signup and view all the answers

What is the role of the return spring in a brake metering valve?

To return hydraulic fluid to the system return manifold (D) Signup and view all the answers

How does a machined slide or spool in a brake metering valve operate?

It moves laterally to admit the correct amount of hydraulic system fluid to the brakes (A) Signup and view all the answers