Sequential Detail Extraction
23 soru
Before operating a portable tactical water purification system, field engineers must execute a precise staging sequence. First, the intake hose is submerged into the raw source with a protective screen attached. Next, operators backwash the multimedia sediment filter to clear accumulated particulates. Immediately following the backwash, water is routed to the high-pressure pump until operational pressure is established. Once pressure stabilizes, a chemical disinfectant is injected into the treated effluent. Finally, engineers verify residual chlorine levels before opening the main distribution valve to the storage bladders.
According to the passage, which step takes place immediately before water is routed to the high-pressure pump?
Read the following technical maintenance passage:
Before technicians store an idle shipboard reverse osmosis desalination unit, they must execute a sequential preservation protocol. First, operators flush the high-pressure membrane housings with unchlorinated permeate to displace residual brine. Once the effluent conductivity drops below the baseline threshold, technicians inject the sodium metabisulfite solution into the circulation loop. Immediately following chemical distribution throughout the pressure vessels, technicians isolate the inlet and discharge valves to prevent air ingress. Finally, personnel seal the membrane housing sampling ports to maintain storage stability.
Based on the passage, match each procedural phase on the left with the correct operational action on the right.
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During field repairs of carbon-fiber aircraft panels, technicians follow a strict thermal curing sequence. First, the damaged area is sanded down to bare composite and wiped clean with solvent. Next, a pre-impregnated resin patch is applied over the repair zone. Prior to activating the heating blanket, technicians must install a vacuum debulking bag over the patch to eliminate trapped air pockets. Once the vacuum seal achieves the required pressure, the heating cycle is initiated to cure the resin. Finally, after the assembly cools to ambient temperature, the vacuum bag is removed for ultrasonic inspection.
According to the passage, which action is performed immediately prior to activating the heating blanket?