New York State Master Electrician Practice Exam

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Study for the New York State Master Electrician Exam. Prepare with detailed questions and thorough explanations. Boost your confidence and ace your exam!

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What is required when using an internal combustion engine as the prime mover for an emergency system?

An on-site fuel supply for 4 hours
An on-site fuel supply for 6 hours
An on-site fuel supply for 12 hours
An on-site fuel supply for 2 hours

The correct answer is: An on-site fuel supply for 6 hours

When utilizing an internal combustion engine as the prime mover for an emergency system, regulations and standards dictate the necessity for an adequate on-site fuel supply. The correct requirement is to have a fuel supply that can sustain the engine for a minimum of 6 hours. This duration ensures that the emergency system can function effectively during an outage or emergency situation, providing enough time for the primary power supply to be restored or alternative measures to be implemented. The 6-hour requirement serves as a crucial safety measure, allowing for potential delays in restoration of power and ensuring that loads essential for safety and human health can be maintained in an emergency. While shorter durations might seem sufficient, they do not provide adequate assurance that system demands can be met during prolonged emergencies, thereby compromising reliability. This underscores the importance of compliance with established standards in emergency preparedness.