What is the maximum timing variation allowed for a vehicle with base timing at 10° +/- 3°?

What is the maximum timing variation allowed for a vehicle with base timing at 10° +/- 3°?

• A. 7 Degrees
• B. 13 Degrees
• C. 3 Degrees
• D. 10 Degrees

Answer: (B)

Timing specs use a base value with a plus/minus tolerance. Here, base timing is 10 degrees with a tolerance of ±3 degrees, so the timing can vary from 7 degrees up to 13 degrees. The maximum timing allowed within that spec is 13 degrees, which is why that value is the correct choice. The 7 degrees would be the minimum within tolerance, the 3 degrees is the size of the allowed variation, and 10 degrees is just the base value before applying the tolerance.

Timing specs use a base value with a plus/minus tolerance. Here, base timing is 10 degrees with a tolerance of ±3 degrees, so the timing can vary from 7 degrees up to 13 degrees. The maximum timing allowed within that spec is 13 degrees, which is why that value is the correct choice. The 7 degrees would be the minimum within tolerance, the 3 degrees is the size of the allowed variation, and 10 degrees is just the base value before applying the tolerance.