Safety Inspections Flashcards

What is the minimum tread depth commonly required on passenger car tires in most U.S. state inspections?

Answer: 2/32 inch

Most U.S. states and federal guidance use 2/32 inch as the minimum legal tread depth for passenger tires.

Technician A says ball joint inspection on a vehicle with the spring on the lower control arm requires supporting the lower arm to unload the joint. Technician B says the vehicle should be lifted by the frame. Who is correct?

Answer: Technician A only

When the spring sits on the lower arm, the lower arm must be supported so the load-carrying ball joint is unloaded for inspection.

A headlight aim check shows the low beam hot spot is well above the horizontal reference line. What is the safety concern?

Answer: Glare that blinds oncoming drivers

Headlights aimed too high direct light into the eyes of oncoming drivers.

During inspection a brake hose shows bulging when the pedal is applied firmly. What should be done?

Answer: Replace the brake hose

A bulging hose indicates internal deterioration and can fail under pressure, so it must be replaced.

Which seat belt condition requires repair before a vehicle passes a safety inspection?

Answer: Webbing is frayed or cut

Frayed or cut webbing compromises the belt's strength in a crash and requires replacement.

A vehicle exhibits a clunk over bumps and the stabilizer bar end links are found with cracked bushings. What safety concern exists?

Answer: Reduced body roll control during cornering

Worn sway bar links reduce stabilizer effectiveness, increasing body roll and affecting handling.

When inspecting wheel lug nuts on a vehicle, which tool should be used for final tightening to specification?

Answer: Calibrated torque wrench in a star pattern

A torque wrench in a star sequence ensures even clamping and prevents rotor distortion or loose wheels.