appealing an ntta test

hello all, new member and another ntta competitor. i took my first test in november. failed on one question in emmisions. my overall percentage was higher than required but obv let myself down in a section. iv got my second test on april 14th. if the same of similar god forbid was to happen again, can i appeal?. and can i say to any one that has a test coming up, and hasnt done one before, do not get in a state. its not bad at all .