Auto Maintenance & Light Repair Flashcards

A technician notices uneven tire wear on the inner edge of both front tires. This is most commonly caused by:

Answer: Excessive toe-out or negative camber

Inner-edge wear on both fronts typically points to alignment issues such as excessive toe or negative camber.

Which fluid is hygroscopic, meaning it absorbs moisture from the air over time?

Answer: Glycol-based brake fluid

Glycol-based brake fluid (DOT 3/4) absorbs moisture, which lowers its boiling point over time.

A headlight bulb burns out repeatedly within weeks of replacement. A likely contributing cause is:

Answer: Touching the glass with bare fingers during installation

Skin oils on a halogen bulb's glass create hot spots that cause premature failure.

What is the correct method to check disc brake rotor thickness against the minimum specification?

Answer: Measure with a micrometer and compare to the discard spec

A micrometer measures rotor thickness, which is compared to the stamped minimum/discard specification.

A vehicle's cabin air filter is severely clogged. The most noticeable symptom to the driver would be:

Answer: Reduced airflow from the dashboard vents

A clogged cabin filter restricts air entering the HVAC system, reducing vent airflow.

When bleeding a hydraulic brake system manually, the recommended sequence is generally:

Answer: Farthest wheel from the master cylinder first

Bleeding usually starts at the wheel farthest from the master cylinder to purge air from the longest line first.

An oil filter gasket is double-stacked because the old gasket stuck to the engine. The likely result is:

Answer: A major oil leak and possible engine damage

A double gasket prevents proper sealing, causing a rapid oil leak that can starve the engine.