Scaling can correct for the 'pegging the meter' concern that may occur during which conditions?

• A. Idle
• B. Cold Start
• C. Normal Operation
• D. High Boost

Answer: (D)

Scaling is used to keep readings within the instrument’s display range by adjusting how sensor outputs map to the gauge. When boost pressure climbs very high, the sensor signal can reach or exceed the top end of the meter’s scale, causing the needle to peg and lose quantitative detail. By scaling, you re-map the high boost signals so they still fall within the readable portion of the scale, preserving resolution and preventing the meter from saturating. Idle, cold start, and normal operation keep boost values within the original scale, so pegging is unlikely there; the risk is highest under high boost, making scaling most relevant in that condition.