1. D. The furnace is necessarilydirty. Normal burningofthe candlesgenerates significant amountsoffine NaCl particlesthat are mostlyfiltered out before the oxygenleaves the furnace. However, the reliefvalve and pressure gage are exposed to the unfiltered oxygen-enriched environment. Ifthose pieces were oxygencleaned when installed, they would no longer be cleanafter burninga single candle. The reliefvalve and pressure gage will have to be cleaned to MIL-STD-1622,33beforebeingcalibrated.
2. 57% 31.5-57.5%
3. 268-322oC133, 43 Filter assembly washer