Question id 601 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Crankcase, Crankshaft, Connecting Rods And Pistons.
Propeller, crankshaft, pistons and connecting rods.
Crankshaft, camshaft, valves, valve springs and push rods.
Crankshaft, connecting rods and pistons.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license