How much horsepower do you need to obtain a black seal (low or high pressure) license?

To obtain a Black Seal license in New Jersey, particularly for high pressure, you are required to demonstrate knowledge of systems that operate above a certain threshold of horsepower. The correct answer indicates that the requirement is for systems with over 100 horsepower, which is critical for high-pressure boilers.

The Black Seal license encompasses the operation and management of boilers, and to ensure safety and proficient handling of more powerful equipment, the minimum threshold is set beyond 100 horsepower for high-pressure systems. This ensures that operators have the requisite training and understanding of the complexities involved in managing such systems, including safety protocols, maintenance practices, and troubleshooting methods that escalate with higher horsepower boilers.

In contrast, the other options represent horsepower levels that are typically associated with lower pressure systems, which do not necessitate the same level of training or licensure. Therefore, those choices do not meet the criteria established for obtaining a Black Seal license.