Maybe. I was always a very slow student while I was in college. It was a mixture of ERAU's emphasis on minutia and my own cynical attitude.
But when it came to learning procedures that I could relate to, it's pretty easy.
For example, we had to memorize the fuel system diagram of the Cessna 172. My brain says, "Psst! Hey Doug! This is a waste of brain cells! Look at the girl in the corner! Woo hoo!"
But on an airliner, we don't specifically have to memorize the fuel schematic, just have a working knowledge of it, and when it's broke know where to go for information on how to fix it.
Like on the Beech 1900, my company required me to know how the propeller governer functioned, how many jet pumps, how many engine-driven hi pressure fuel pumps, how much gas was in the collector tank, how the flapper valves work to equalize fuel, etc.
In retrospect, it really didn't matter one iota.
On the MD-88, I know there are two engines, Pratt&Whitney JT8's, they burn Jet-A out of three tanks and there are some electric and some engine-driven fuel pumps that correspond to annunciators which I'll look in the fuel or powerplant section of the PRM (Pilots Reference Manual) if one comes on during flight. That more or less concludes the engine/fuel lesson on the MD-88.
Oh, and I think it produces about 21,750 pounds of thrust per engine, but it's not testable material.