Fluid Flow Operations_Crash Course for Campus Placement Interviews for Chemical Engineering

A: Stabilization comes from removing the disturbance and decoupling loops, which slowing the feed and freezing the gas PC achieves. B drains liquid but worsens gas carry-under and can starve downstream pumps. C amplifies oscillation because the residence time hasn't changed. D increases gas residence but risks PSV lift and doesn't address the feed transient.

A: The dominant risk is CO2 corrosion with chloride-assisted pitting at temperature. B ignores continuous CO2 acidification. C overstates SSC at very low H2S and without high hardness. D misapplies velocity limits without sand or high wall shear.

A: Power comes from ρgQH adjusted for efficiency, landing in the tens of kW range. B drops head from the calculation entirely. C confuses volumetric flow with energy requirement. D ignores efficiency and dynamic losses, undercutting the estimate.

A: Correct sequencing prevents unintended motion by confirming fail-safe before energizing. B risks discovering wrong fail action too late. C energizes hardware without knowing mechanical bias. D introduces process risk before basic checks are complete.