Video: Lub npe ntawm NFPA 499 yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
TIAB SA 499 : Pom zoo xyaum ua kom muaj kev faib cov hmoov av thiab kev puas tsuaj (Classified) Qhov chaw rau kev teeb tsa hluav taws xob hauv cov txheej txheem tshuaj.
Hauv qhov no, lub npe ntawm NFPA 654 yog dab tsi?
TIAB SA 654 : Txuj kev tiv thaiv hluav taws thiab plua plav tawg los ntawm kev tsim khoom, kev ua, thiab tuav cov khoom tawg yooj yim.
Ib tug kuj yuav nug, qhov twg hauv qab no yog ib qho piv txwv ntawm cov plua plav combustible? Piv txwv muaj xws li: cov khoom ua liaj ua teb xws li qe dawb, hmoov mis, pob kws, qab zib, hmoov nplej, nplej, qos yaj ywm, nplej, thiab lwm yam hlau xws li txhuas, bronze, magnesium, zinc, thiab lwm yam. hmoov av xws li coal, sulfur, thiab lwm yam.
Dhau li ntawm no, chav kawm twg yog cov plua plav combustible?
Qhov tseeb hais tias muaj tej plua plav combustible tam sim no tsis txhais hais tias a Chav II Qhov chaw muaj kev phom sij. Yuav kom suav hais tias yog "plua plav", cov khoom siv hluav taws xob yuav tsum muaj nyob hauv cov khoom sib cais ntawm 420 microns (0.420 mm) lossis tsawg dua. Xws li cov plua plav yuav dhau los ntawm No. 40 sieve.
Puas yog cov pa roj carbon monoxide puas yog cov hmoov av combustible?
Piv txwv ntawm hmoov av combustible : Hlau Plua plav - Xws li Aluminium thiab Magnesium. Ntoo Plua plav . Coal thiab lwm yam Cov pa roj carbon plua plav . Yas Plua plav thiab Additives.
Pom zoo:
Lub npe ntawm txhua lub hli puv lub voj voog yog dab tsi?
Lub hli hli Phase Northern Hemisphere Southern Hemisphere Waxing gibbous Sab xis, 50.1%–99.9% lit disc Sab laug, 50.1%–99.9% lit disc Puv hli 100% illuminated disc Waning gibbous Sab laug, 99.9% t 50% disc. Sab xis, 99.9% – 50.1% lit disc Xeem Quarter Sab laug sab, 50% lit disc Sab xis, 50% lit disc
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