Question 171Motor Plants - 1st Asst/Chief
70% to passWhich of the following statements concerning fire-tube boilers is correct?
AFlames impinge on the tubes.
BWater flows through the tubes.
CCombustion gases flow through the tubes.
DCombustion occurs in the tubes.
AI Explanation
The correct answer is C) Combustion gases flow through the tubes. In a fire-tube boiler, the hot combustion gases from the furnace flow through the tubes, while the water surrounds the outside of the tubes. This allows the heat from the combustion gases to be transferred to the water, generating steam. The other options are incorrect because: A) The flames do not directly impinge on the tubes, they heat the combustion gases that flow through the tubes. B) The water does not flow through the tubes, it surrounds them. D) Combustion occurs in the furnace, not inside the tubes.
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