QuestionJuly 25, 2025

Drum scoring can be caused by all of the following except: a. Inferior brake lining materials b. Excessive dust build up c. Changes in drum metallurgy d. Worn linings

Drum scoring can be caused by all of the following except: a. Inferior brake lining materials b. Excessive dust build up c. Changes in drum metallurgy d. Worn linings
Drum scoring can be caused by all of the following except:
a. Inferior brake lining materials
b. Excessive dust build up
c. Changes in drum metallurgy
d. Worn linings

Solution
3.1(314 votes)

Answer

c. Changes in drum metallurgy Explanation 1. Identify the cause of drum scoring Drum scoring is typically caused by physical or material issues that affect the brake drum's surface. 2. Analyze each option a. Inferior brake lining materials can cause uneven wear, leading to scoring. b. Excessive dust build-up can lead to abrasive action, causing scoring. c. Changes in drum metallurgy are unlikely to directly cause scoring; they might affect performance but not directly score the drum. d. Worn linings can expose metal parts, leading to scoring.

Explanation

1. Identify the cause of drum scoring<br /> Drum scoring is typically caused by physical or material issues that affect the brake drum's surface.<br /><br />2. Analyze each option<br /> a. Inferior brake lining materials can cause uneven wear, leading to scoring.<br /> b. Excessive dust build-up can lead to abrasive action, causing scoring.<br /> c. Changes in drum metallurgy are unlikely to directly cause scoring; they might affect performance but not directly score the drum.<br /> d. Worn linings can expose metal parts, leading to scoring.
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