Question 44 QMED04 - Boiler Technician-Watertender

The Correct Answer is B **Explanation for B (minimize the system's line pulsations):** The air receiver (storage tank) acts as a large buffer volume immediately downstream of the compressor. Reciprocating compressors, in particular, produce air flow in distinct pulses. The receiver absorbs these pressure fluctuations and smooths out the peaks and valleys, delivering a much steadier, continuous pressure and flow to the downstream system (piping and tools). This minimizes disruptive line pulsations. **Why other options are incorrect:** * **A) remove all traces of oil from the air:** Removing oil is the primary function of an **oil separator** or **coalescing filter**, not the receiver tank itself. While some oil vapor might settle out within the tank, it is not the intended function or primary mechanism for total oil removal. * **C) receive exhaust air from pneumatic accessories:** Pneumatic accessories exhaust used air directly to the atmosphere, not back into the pressurized storage receiver. * **D) dry the air discharged from the intercooler:** While the receiver contributes to some initial moisture condensation (acting as an early separator for bulk water), the primary function of actively **drying** the air (removing water vapor) is performed by dedicated downstream components like **air dryers** (refrigerated or desiccant). The receiver is not engineered or typically placed to perform effective drying.