ISA CCST Level III Practice Questions - ISA Certified Control Systems Technician (CCST) Level III Master Exam

What is a ratio control strategy used for?

To calculate the percentage of controller output To maintain a fixed ratio between two process variables, such as fuel-to-air ratio in a combustion system To compare two different instrument brands To determine the optimal control valve size

Correct Answer:

To maintain a fixed ratio between two process variables, such as fuel-to-air ratio in a combustion system

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