Question 51Electricity/Electronics - QMED70% to pass
At a minimum threshold, how many milliamps of current through the body produces a painful sensation that most people would perceive as an electric shock?
AI Explanation
The correct answer is A) 3 to 7 mA.
This is the minimum threshold for a painful electric shock that most people would perceive. At this level of current, the electricity can stimulate the sensory nerves in the body, causing a painful sensation. The other answer choices are either too high (B, C, and D) or not specific enough to the minimum threshold for a painful shock.
The 3 to 7 mA range is considered the general threshold based on safety regulations and guidelines for electrical hazards. This information is relevant for the US Coast Guard Captain's License Examinations, as it is important for mariners to understand the risks and effects of electric shock in a maritime environment.
Related Questions
#49 With all other factors considered equal (such as voltage, conducting path through the body and the duration of contact), contact with an energized electrical system conductor of which system type would produce the most damaging effect? #50 At a minimum threshold, how many milliamps of current through the body produces a condition where most people would be unable to let go of the energized electrical conductor due to involuntary muscular contraction? #52 As part of a routine maintenance program for deck machinery motor controllers, what should be done? #53 If deck machinery is expected to be idle for an extended period of time, what should be done? #54 In performing routine maintenance of a ship's service alternator, what should be included?