In which scenario would you increase speed beyond 20 MPH for a lead locomotive after a Daily Inspection?

Increasing speed beyond 20 MPH for a lead locomotive after a Daily Inspection is appropriate when the speed recorder is functioning properly. A functioning speed recorder is critical for ensuring accurate speed monitoring, which is essential for safe train operation. The speed recorder provides real-time feedback to the engineer about the train's speed, helping to avoid exceeding limits that could pose safety risks. Therefore, proper operation of the speed recorder supports confidence in the train's velocity, allowing for safe increases in speed.

While some options relate to safety and maintenance checks, they may not directly address the operational readiness indicated by the functioning of the speed recorder, which is a key component in determining safe speed adjustments after an inspection. For instance, clearance from the dispatcher indicates permission to proceed but does not account for the condition of the speed monitoring equipment. Similarly, finding no defects during the inspection is a positive situation, but it doesn't guarantee the performance of instruments essential for safe operation. Lastly, the completion of repairs is necessary, but once again does not inherently speak to the operational readiness concerning speed monitoring. Hence, the functioning of the speed recorder stands out as the definitive factor in deciding to increase speed beyond 20 MPH.