A fast acceleration run analyzes performance during rapid throttle opening and RPM rise.

• A. Only at idle
• B. True
• C. False
• D. Never

Answer: (B)

Throttle response during a rapid throttle opening and RPM rise is what a fast acceleration run evaluates. This test is all about how quickly the engine responds when you snap the throttle and how the RPM climbs as power is requested, capturing the dynamics of torque delivery, fuel and ignition timing adjustments, and any boost behavior if applicable. So the statement that a fast acceleration run analyzes performance during rapid throttle opening and RPM rise is exactly describing what this test measures, making it true. It isn’t focused on idle or on no acceleration; it’s about the transition from low to higher RPM under a quick throttle input.