Vehicle Maintenance: Air Brake and Pre-Trip Inspection Safety

Build confidence with 10 original questions about Vehicle Maintenance: Air Brake and Pre-Trip Inspection Safety. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 10

If you find that the air compressor drive belt is loose or worn during your engine compartment check, what should you do?

Have the belt repaired or replaced before operating the vehicle.

Continue driving and check the belt again later.

Ignore the issue if the compressor is still running.

Tighten the belt as much as possible by hand.

2 / 10

A driver repeatedly presses and releases the brake pedal while stopped in traffic. What is the risk of this action?

The brakes will cool down faster.

It will increase fuel efficiency.

It will improve brake response.

Air pressure may drop too low for the brakes to work.

3 / 10

A driver notices the safety valve on the air tank is releasing air. What is the correct response?

Continue driving and monitor the situation.

Have the fault fixed by a mechanic before operating the vehicle.

Tap the valve to see if it will close.

Cover the valve to stop the air from escaping.

4 / 10

If the low air pressure warning light and buzzer come on while you are driving, what is the safest response?

Ignore the warning if the brakes still feel normal.

Continue driving until you reach your destination.

Bring the vehicle to a safe stop right away and park it.

Pump the brakes repeatedly to build up pressure.

5 / 10

A driver is performing a pre-trip inspection and notices that the battery box cover is missing. What should be done?

Replace or secure the battery box cover before operating the vehicle.

Continue driving and report the issue at the end of the day.

Cover the batteries with a piece of cloth temporarily.

Ignore the missing cover if the batteries are still in place.

6 / 10

During a walkaround inspection, you notice a brake hose is worn from rubbing against another part. What should you do?

Report the defect and have it repaired before operating the vehicle.

Wrap tape around the hose and continue driving.

Spray lubricant on the hose to reduce friction.

Ignore the wear if the hose is not leaking.

7 / 10

A driver is inspecting a vehicle with automatic slack adjusters and finds that the pushrod stroke exceeds the legal brake adjustment limit. What is the correct action?

Continue driving and check again at the next stop.

Ignore the issue if the brakes still seem to work.

Manually adjust the slack adjuster and continue driving.

Take the vehicle to a repair facility to have the problem corrected.

8 / 10

During cold weather, what is a common mistake drivers make with air brake systems that can lead to brake failure?

Failing to check and refill the alcohol evaporator daily.

Using water instead of alcohol in the evaporator.

Not draining the fuel tank daily.

Letting the engine idle for too long.

9 / 10

While inspecting the rear of your vehicle, you notice the taillights are not operating. What should you do before driving?

Ignore the issue if you are driving during the day.

Drive with hazard lights on instead.

Cover the taillights with reflective tape.

Repair or replace the taillights so they are operating and the correct color.

10 / 10

What is a common mistake when inspecting slack adjusters on vehicles with automatic adjusters?

Manually adjusting the slack adjuster to bring the pushrod stroke within legal limits.

Using gloves when pulling on the slack adjuster.

Checking the slack adjuster only once a month.

Ignoring the manufacturer's service manual.

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