The Jetsons season 3 episode 10
Spacely for a Day
Spacely convinces all his employees to take an aptitude test and makes sure George scores the lowest. But when Judy, Elroy and Astro alter his father's score to be higher than everyone else's, George is given charge of Spacely's plant for the day when his boss is forced to take an impromptu vacation. Upon discovering that George is in charge of Spacely's plant, Cogswell makes plans to destroy Spacely Space Sprockets once and for all and attempts to ensure that George takes the fall.