Question 55General Subjects - Assistant Engineer

The correct answer is B) Diaphragm pressure sensor. Diaphragm pressure sensors are well-suited for measuring oil-fired boiler furnace and forced-draft pressures. The diaphragm is a flexible element that can accurately detect and respond to changes in pressure, making it a reliable choice for these types of pressure measurements. Diaphragm sensors are commonly used in various industrial applications, including boiler systems, due to their durability, sensitivity, and ability to withstand the harsh environmental conditions often found in these settings. The other options, such as bellows, Bourdon tube, and strain gage pressure sensors, may not be as well-suited for this specific application due to factors like their sensitivity to temperature changes, limited pressure range, or susceptibility to fouling in the presence of oil or other contaminants.