Excessive use of the service brakes can lead to overheating which can cause which result?

Study for the Alabama CDL Class A Permit Test. Use our multiple-choice questions, detailed explanations, and helpful hints to prepare. Master the concepts and get ready for your exam!

Multiple Choice

Excessive use of the service brakes can lead to overheating which can cause which result?

Explanation:
When brakes’re heated beyond their normal range, the metal components respond by expanding. The brake drum, being metal, will grow in size as it gets hotter. That’s why expansion is the correct outcome to expect from excessive braking heat. Contraction would require cooling, which isn’t the immediate effect of overheating. Overheating doesn’t increase brake pad life; it wears pads faster and can lead to brake fade or glazing, so that option doesn’t fit.

When brakes’re heated beyond their normal range, the metal components respond by expanding. The brake drum, being metal, will grow in size as it gets hotter. That’s why expansion is the correct outcome to expect from excessive braking heat. Contraction would require cooling, which isn’t the immediate effect of overheating. Overheating doesn’t increase brake pad life; it wears pads faster and can lead to brake fade or glazing, so that option doesn’t fit.

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