Question 170Motor Plants - 1st Asst/Chief
70% to passDowncomers installed on auxiliary package boilers are protected from direct contact with hot gases by _______________.
Asteel baffles
Brefractory and insulation
Cwater wall tubes
Dseveral rows of screen tubes
AI Explanation
The correct answer is B) refractory and insulation. Downcomers on auxiliary package boilers are protected from direct contact with hot gases by a layer of refractory material and insulation. This insulation and refractory lining helps prevent the hot combustion gases from directly impinging on the downcomers, which could potentially damage them. The other answer choices, such as steel baffles, water wall tubes, or screen tubes, are not the primary means of protecting the downcomers from the hot gases in this type of boiler system.
Related Questions
Q135:The amount of fuel delivered by a unit injector is controlled by the____________... Q134:Differential needle valves used in fuel injectors are directly closed by________... Q141:Which of the following statements concerning the factors affecting ignition dela... Q88:While bunkering heavy fuel, what quick/easy test can one perform onboard to dete... Q131:Carbon deposit build up on the injection nozzle orifice is least likely to occur...
Ready to test your knowledge?
Take a Motor Plants - 1st Asst/Chief Practice ExamOfficial Resources