Pass the PMP exam on your very first attempt

A: Principle: One failure mode must explain all observed behaviors. Excess inlet momentum disrupts the separation zone, giving apparent level swings and entrainment-driven carry-under. Option A tempts engineers familiar with control tuning, but it doesn't create physical entrainment inside the vessel.

A: Principle: Corrosion needs electrolyte and a driving species. Here, intermittent water enables carbonic acid formation from CO2, while H2S levels are below SSC thresholds. Option A catches engineers who overgeneralize any H2S presence as an SSC risk without checking partial pressure.

A: Principle: Protect downstream units by restoring design conditions, not forcing throughput. Reducing inlet rate brings gas velocity and carryover back within dehydration limits. Option A traps engineers who equate pressure with capacity, ignoring velocity-driven entrainment.

A: Principle: Mechanical design must tolerate credible overpressure scenarios. MAWP equal to PSV set leaves no margin for accumulation and code allowances. Option C attracts engineers who think changing PSV settings is simpler, ignoring system-wide relief balance.

A: Principle: Hydrostatic level measurement depends directly on density. Using water density instead of hydrocarbon explains a consistent low bias during static testing. Option C tempts field engineers, but trapped gas usually causes erratic, not stable, offset.

A: Principle: Erosion dominates where momentum changes, corrosion elsewhere. Targeted ceramic coating at the inlet absorbs sand impact without over-specifying the whole vessel. Option C traps engineers who default to duplex for corrosion, ignoring its erosion vulnerability and cost.

A: Principle: Separation quality shifts downstream operating envelopes. Drier gas changes compressor surge characteristics even if flow is steady. Option A attracts engineers focused on ΔP alone, missing system interaction.

A: Principle: Layout should favor drainage, isolation, and access. Top-entry reduces trapped liquid and simplifies maintenance offshore. Option B tempts designers focused on hydraulics, not operability.

A: Principle: Relief events often stem from phase misrouting, not overpressure. Gas bypassing liquid control fills the vessel vapor space faster than expected. Option A catches engineers who assume mechanical fault before checking process paths.