Custodian Engineer Book Practice Test 2026 - Free Custodian Engineer Exam Questions and Study Guide

The pressuretrol is essential for the startup and shutdown of a rotary cup oil burner because it monitors and regulates the pressure within the system. It ensures that the burner operates at the correct pressure levels for efficient fuel delivery and combustion. During startup, the pressuretrol helps maintain the necessary pressure for the burner to ignite properly, while during shutdown, it assists in safely reducing pressure to prevent any hazardous conditions. Maintaining the appropriate pressure is crucial for the burner’s efficiency and safety, making the pressuretrol a fundamental component in the operation of a rotary cup oil burner.