A coil-type automatically fired auxiliary boiler is to be laid up wet for an indefinite period. The boiler water should be treated to ensure that __________.
⢠Wet lay-up procedures for auxiliary (coil-type) boilers ⢠Purpose of water treatment during extended idle periods ⢠Effects of pH control vs. oxygen scavengers vs. sludge formation
⢠Ask yourself: During a long wet lay-up, what is the MAIN risk to the internal metal surfaces of the boiler? ⢠Which water-condition factor, if kept within a proper range, best prevents corrosion over time? ⢠Which choice sounds like an on-line operating concern (normal running) rather than a long-term preservation concern?
⢠Identify which option directly addresses corrosion protection of waterside surfaces during storage ⢠Distinguish between controls used for normal operation (like blowdown and sludge control) and those for preservation/lay-up ⢠Check which option could be clearly specified by a manufacturerâs recommendation and monitored over time
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