Question 5Electricity & Electronics - 1st Asst/Chief

The correct answer is D) A shock hazard exists when there is a difference in potential between conductors or a conductor and hull ground. This is correct because a shock hazard can only occur when there is a difference in electrical potential between two conductive points. Temporary protective grounds are used to establish an equipotential zone, meaning all conductive surfaces are at the same electrical potential, eliminating any potential difference and thus the shock hazard. The other options are incorrect because A) and B) state that a shock hazard only exists in specific situations, when in fact a potential difference between any two conductive points can create a shock hazard. Option C) is incorrect because an equipotential zone eliminates the shock hazard, not creates it.