Question 472Steam Plants - Assistant Engineer70% to pass
The pressuretrol which is installed on an auxiliary boiler senses steam pressure changes and _______________.
AI Explanation
The correct answer is D) automatically regulates the quantity of oil and air flow to the burner.
The pressuretrol is a safety device installed on an auxiliary boiler that senses changes in steam pressure. When the steam pressure increases, the pressuretrol automatically reduces the quantity of oil and air flowing to the burner, thereby regulating the combustion process and preventing a dangerous increase in steam pressure. This automatic regulation of the fuel and air flow is the primary function of the pressuretrol.
The other answer choices are incorrect because they do not accurately describe the main purpose of the pressuretrol. The pressuretrol does not control the flow of feed water (A), monitor the boiler's high water level (B), or secure the fires when a fusible plug burns out (C).
Related Questions
#470 Which of the listed sequence of events occurs when an automatic auxiliary boiler is prepurged? #471 A photoelectric cell installed in an automatically fired auxiliary boiler burner management system _______________.#473 The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent _______________.#474 Constant capacity, pressure atomizing, fuel burners designed to meet a wide variation in steaming loads on an auxiliary boiler, are _______________.#475 During unsafe firing conditions in a large automatic auxiliary boiler, various control actuators are interlocked with the burner circuit to prevent start-up, in addition to safety shutdown. These controls are referred to as _______________.