AAA EQC-152 Practice Test 2026 - Free EQC-152 Practice Questions and Study Guide

Engine model numbers in light aircraft convey the engine’s layout and capacity. The first letter tells you the cylinder arrangement: O means horizontally opposed (a flat engine with cylinders opposite each other). The number shows displacement in cubic inches, so 235 refers to about 235 cu in. The suffix L2C identifies a specific variant within that family, with its own configuration details and performance. If the aircraft uses a carbureted, four-cylinder, Lycoming engine in the 235 class, the O-235-L2C is the match. The option with I would indicate a fuel-injected version, which belongs to a different installation; the O-320-D2B is a larger displacement engine from the same general family but not the one installed on this aircraft; and the R-1340 is a radial engine with a different design altogether. So the assigned engine model is the O-235-L2C because it aligns with the aircraft’s four-cylinder, horizontally opposed, 235 cu in, carbureted configuration.