Certified Technology Specialist (CTS) Practice Exam

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Which is NOT a typical symptom of a DC power supply problem over extended distances?

Voltage stability
Inconsistent equipment operation
Excessive voltage drop
Poor audio quality

The correct answer is: Voltage stability

Voltage stability is not a typical symptom of a DC power supply problem over extended distances because, when DC power is transmitted over long distances, it tends to experience voltage drop or instability rather than maintaining a stable voltage level. Inconsistent equipment operation can occur due to insufficient voltage levels reaching the equipment, which may lead to erratic functioning or failure to start. Excessive voltage drop is a significant concern when powering devices from a distance, as resistance in the conductors directly affects the voltage reaching the load. Poor audio quality can arise from insufficient or fluctuating power levels to audio equipment, which may impact performance and fidelity, but is typically a secondary effect of the primary issues related to voltage drop and equipment operation. Thus, voltage stability stands out as the condition that is least affected in typical scenarios involving DC power supply issues over long distances.