Wrong move
Direct answer
The risky shortcut is guessing from cable position in the box. Line is the supply side feeding the device; load feeds downstream devices, and the only safe way to identify it is controlled testing and tracing by a qualified person.
How to use this answer
Read the answer once, then prove it by choosing an answer in a practice question before looking at the explanation. If the miss repeats, tag the domain as Device wiring and drill a smaller set before returning to mixed practice.
Prep path
Guide
IBEW Aptitude Test Study Guide
Independent IBEW aptitude study guide for algebra, functions, reading comprehension, and timed practice.
SamplesIBEW Aptitude Sample Questions
Public IBEW Aptitude Test Prep sample questions with explanations.
PracticeOpen IBEW Aptitude Test Prep
Start with the 10-question free set before deciding whether to unlock the full question bank.