For an analog electronic transmission system for instrumentation and control purposes, what is a common industry standard for electronic signal current range?

Correct Answer: Option C — 4 to 20mA

The 4 to 20 mA current loop is the universal standard for analog electronic instrumentation. The 4 mA 'live zero' allows the control system to distinguish between a zero-scale reading and a broken wire or loss of power, ensuring reliable monitoring of critical shipboard parameters and control signals.