These changes made to the disability questions mean that the population identified in 2008 is different from that identified in previous years and the results should not be compared. For a summary of all changes to the ACS 2008 survey see: http://www.census.gov/acs/www/Downloads/SummaryResultsACS2006ContentTest.pdf. Below are the disability questions used in the ACS 2003-7 and those used in the ACS 2008, with descriptions of the major differences between the questions with similar concepts.
Definition of undesirable discharge. : a formal release from military service under conditions other than honorable.
QUESTION: What is backflow? ANSWER: Backflow is the undesirable reversal of flow of nonpotable water or other substances through a cross-connection and into the piping of a public water system or consumer s potable water system.There are two types of backflow--backpressure backflow and backsiphonage.UESTION: What is backsiphonage? ANSWER: Backsiphonage is backflow caused by a negative pressure (i.e., a vacuum or partial vacuum) in a public water system or consumer s potable water system. The effect is similar to drinking water through a straw.