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.