737-300 fuel/suction feeding
737-300---With the fuel crossfeed valve in the open position,it is possible to feed both engines from one tank utilizing that tanks fuel pumps. My question is in reguard to suction feeding. Can one fuel tank suction feed both engines? And while were discussing fuel suction, how is the airplane able to suction feed the APU, when it appears that the wing tank is lower than the APU?--thanks alot