Which of the following is NOT a service test for aerial apparatus?

The choice indicating "Pump Efficiency Test" is not considered a service test for aerial apparatus because service tests for these types of apparatus are primarily designed to assess the operational readiness and safety of the aerial device itself, rather than the performance of the pump system. Service tests typically include evaluations that focus on the function, stability, and operational capabilities of the aerial ladder or platform, while ensuring that all critical components are functioning correctly.

On the other hand, the pump efficiency and performance aspects are usually evaluated separately, focusing on how well the pump operates in terms of flow rates and pressure outputs. The other tests mentioned—pressure control, pumping, and priming tests—are directly related to the functionality of the aerial apparatus during an emergency scenario, ensuring that it can perform as expected when deployed.