Commercial Driver License (CDL) Class B Practice Test

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Study for the Commercial Driver License (CDL) Class B Test. Study using multiple-choice questions, hints, and explanations. Prepare for your exam effectively!

Practice this question and more.

Which consequence best describes failing to drain air tanks regularly?

Reduced fuel efficiency
Increased risk of brake failure
Higher cargo insurance rates
Difficulty in shifting gears

The correct answer is: Increased risk of brake failure

Failing to drain air tanks regularly primarily leads to an increased risk of brake failure. Air tanks in vehicles equipped with air brakes collect moisture over time, which can mix with the air and create corrosion or freezing issues within the brake system. If moisture accumulates, it can lead to brake components freezing in cold weather or cause the brakes to not operate effectively due to hydraulic lock. This impairment can prevent the brakes from engaging properly, increasing the risk of a serious failure while the vehicle is in operation. This is critical for drivers to understand, as the brake system’s reliability is essential for safe vehicle operation and accident prevention. Therefore, maintaining the integrity of the air tanks through regular drainage is fundamental in ensuring the overall safety of the vehicle and its operation.