The pitch circle diameter (PCD) of a gear is a vital measurement when using gears. When you mesh two gears together, the teeth need to mesh to a precise distance, if too deep then the teeth will bind and wear, too shallow and you will get excessive back lash and risk damage to the teeth.
Burping gas that smell strongly of rotten eggs is actually indicative of the presence of sulfur in our stomach. This is the reason why this type of burps is commonly known as sulfur burps. The smell of sulfur burps or rotten egg burps usually comes from the presence of hydrogen sulfide.
Water Questions and Answers. So, you say the water from your faucet smells like rotten eggs? Maybe you wonder how water gets to your house way up on that hilltop or would like to know why your pond is full of slimy green algae. Hopefully, this Questions and Answers page can supply you with some answers. And, if you have a water question you'd like answered, email it to Drippy here at Water Science and we'll try to find an answer.