Question: Does Orange County, California require airplanes to be quiet?, Answer:Yes, Description of Orange County, California: County in California, United States, Fact1: John Wayne Airport is in Orange County., Fact2: John Wayne Airport is in very close proximity to residential areas., Fact3: There is a General Aviation Noise Ordinance in Orange County, California. , Fact4: Commercial pilots will cut the engine of the aircraft on arrival and departure from Orange County, California. 
Step1: Which ordinance must airports within or close to Orange County, California abide by?, Step2: What actions do commercial pilots take concerning their engine noise when arriving or departing Orange County, California?, Step3: Does #1 and #2 require that their airplanes make less noise?, Wikipedia page for step 1: Orange County, California, Wikipedia page for step 2: Orange County, California, Wikipedia page for step 3: General Aviation Noise Ordinance, not_definitive_answer: False, incorrect_answer: False