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  • Problem with my toilet flapper?

    The flapper on my toilet keeps getting stuck in the open position when we flush. I've adjusted the chain to as short as I can make it, even 1 more link limits the flapper from closing and sealing. When it does close, it seals fine, it just gets stuck in the open position about 50% of the time and I need to open the tank to knock it back down. Would a little grease on the two tabs that hold the flapper be okay to use? Or do I just need to replace the flapper, or the flapper and overflow pipe? Thanks

    8 AnswersMaintenance & Repairs1 decade ago

  • How do I determine sample size for a new manufacturing process?

    I have a new manufacturing process producing a variety of specific products. Each product has an annual population that varies from 1000 to 100,000 EAU. I want to determine an INITIAL inspection plan to qualify each product. I was thinking something like 30 random samples from each of the first 3 lots. However, I am sure that there is some statistical measure that I could use that would tell me the correct sample size and repetitions for a given confidence level (maybe 95%). Can someone give me the proper formula to use for this?

    1 AnswerEngineering1 decade ago