GCAP Operator 1 Practice Exam 2026 - Free GCAP Practice Questions and Study Guide

In a two-staged compression system, it is typically recommended to start the low-stage compressor first. This is because the low-stage compressor is responsible for compressing the gas from a lower pressure to an intermediate pressure before it is sent to the high-stage compressor for further compression. Starting the low-stage compressor first allows for the proper sequencing of the system, ensuring that there is a sufficient feed gas supply available for the high-stage compressor to operate effectively.

By starting the high-stage compressor first, you may encounter operational issues due to the lack of the necessary intermediate pressure that the high-stage compressor requires to function properly. Additionally, running both compressors simultaneously may not allow for optimal pressure management and could lead to inefficiencies or potential damage to the compressors in a two-staged setup.

This careful management of the starting sequence is crucial for maintaining system efficiency and ensuring longevity of the equipment.