Question 457Steam Plants - Assistant Engineer

The correct answer is C) root valve. The root valve is the valve located between the fuel oil header and the burner valve. This valve controls the flow of fuel oil from the header to the burner, allowing the operator to regulate the fuel supply to the burner as needed. The root valve is a critical component in the fuel oil system, as it ensures the safe and proper operation of the burner. The other answer choices are incorrect because: A) The header valve is a different valve that controls the flow of fuel oil from the fuel oil tank to the fuel oil header. B) The register valve is not a standard component in a fuel oil system. D) The return valve is used to recirculate excess fuel oil back to the fuel oil tank, not to control the flow to the burner.