Vehicle Maintenance & Inspection Flashcards

What does a squealing noise when you first apply the brakes typically indicate?

Answer: Brake pad wear indicators are contacting the rotor

Most brake pads have a built-in metal wear indicator that squeals when pads are worn and need replacement.

Which of the following signals that a car's wheel bearings may be failing?

Answer: A humming or growling noise that changes with vehicle speed

Failing wheel bearings produce a characteristic hum or growl that increases in pitch and volume with vehicle speed.

What is the correct procedure when adding coolant to an overheated engine?

Answer: Wait for the engine to cool completely before opening the radiator cap

Opening the radiator cap on a hot engine releases pressurized steam that can cause severe burns.

What does it mean if your vehicle's power steering becomes suddenly heavy or unresponsive?

Answer: Power steering fluid is low or the pump has failed

Loss of power steering assist is typically caused by low fluid, a broken belt, or a failed electric or hydraulic pump.

How long can a typical car battery last before needing replacement?

Answer: 3–5 years

Most automotive batteries have a lifespan of 3–5 years depending on climate, usage, and maintenance.

What is the purpose of the vehicle's catalytic converter?

Answer: Reduces harmful pollutants in exhaust gases

The catalytic converter uses chemical reactions to convert CO, hydrocarbons, and NOx into less harmful CO2, water, and nitrogen.

What maintenance step helps prevent rust and corrosion on brake rotors during long storage periods?

Answer: Taking short drives periodically to clean rust from rotor surfaces

Surface rust on rotors is normal after sitting but is cleared by the brake pads during normal driving within a short distance.