Question 10

The Correct Answer is C **Why Option C ("examine the condition of the flame") is correct:** A "peep" hole (or observation port) in the boiler casing is designed primarily to allow operators to look directly into the furnace while the boiler is running. The most critical visual inspection necessary for safe and efficient operation is checking the condition, shape, color, and stability of the main burner flame. This confirms that the fuel-air mixture is correct (good combustion) and that the flame is not impinging on the water tubes or causing dangerous pulsations. **Why the other options are incorrect:** * **A) examine the condition of the refractory cones:** While the refractory is visible through the peep hole, examining the overall condition of the flame (combustion quality) is the primary, immediate operational function. Refractory damage is typically a secondary observation, or often checked during an outage. * **B) check for excess smoke in the stack:** Smoke observation is performed visually at the stack exit or, more commonly and accurately, measured continuously by instruments (opacity meters) located in the exhaust duct. The peep hole does not provide a view of the stack. * **D) check the operation of the sootblowers:** Sootblowers are typically located deeper within the convection passes, superheater sections, or economizer sections, which are generally not directly viewable through the main furnace peep holes. Sootblower operation is confirmed through instrument readings (steam pressure drops) and sometimes through specialized viewing ports located near the specific sootblower lances, not usually the main flame viewing port.