<p>It depends a lot on what the particular college recommends. But I generally tend to agree with ucbalumnus’s advice, and suggest to not skip a class which is needed for other classes later, since you need to be sure you have a solid foundation and aren’t at a disadvantage compared to classmates who took the class at your college.</p>
<p>So, if you are only required to take one chemistry class for aerospace engineering, you might as well take credit for it and be done with it. However, if you are required to take a 2nd chemistry class which has the 1st chemistry class as a prerequisite, take the first class instead of using AP credit. </p>
<p>Calculus is very foundational for engineering. Don’t place out of it unless your college highly recommends that you do so. Especially since you self-studied Calculus, you would likely be less well prepared than those who took the Calc classes at your college.</p>