Question 94 of 140

What maintenance practice helps reduce the amount of oil that gets into the air brake system over time?

Pick an answer

Keeping the air compressor properly serviced so its internal seals do not let oil pass into the airflow
Adding extra engine oil to the air tanks
Disconnecting the air dryer to increase airflow
Draining tanks less often so more oil has time to settle out before the next scheduled service

Correct!

Not quite. The correct answer is highlighted.

Show answer

Correct answer to question 94 (Air Brakes): Keeping the air compressor properly serviced so its internal seals do not let oil pass into the airflow

Why

A well-maintained compressor with intact seals is less likely to let engine oil leak into the compressed air stream, which helps keep the brake system's air cleaner overall.

Updated: November 2026

Get ready for the knowledge testFree for iPhone and Android

Practice it in test 130 questions · pass with 24 (80%)

What maintenance practice helps reduce the amount of oil that gets into the air brake system over time?

Why

More questions from this subtest