Which of the following causes would most likely result in excessively high belt-driven reciprocating air compressor drive motor running current draw?

Correct Answer: Option A — Excessive drive belt tension.

Excessive belt tension increases the mechanical load on the drive motor bearings and shaft. This added friction and mechanical resistance require the motor to draw significantly higher current to maintain the required rotational speed, potentially leading to motor overheating or premature failure of the drive components.