Which of the following is considered an aircraft class rating?

In aviation, aircraft class ratings refer to categories of aircraft that share specific characteristics and operational functions. A single-engine land rating is a class rating that allows pilots to operate aircraft with a single engine that is designed for land operations. This classification is a fundamental part of pilot licensing and training, indicating proficiency in handling these types of aircraft.

Single-engine land aircraft are typically smaller and have simpler operating characteristics compared to multi-engine or seaplane aircraft, making them a foundational component of a pilot's training and experience. This rating is specifically recognized in aviation regulations and is required for pilots who wish to fly these types of aircraft.

In contrast, heavy aircraft is a weight classification rather than a class rating, turbojet describes the type of engine and is not a class rating, and experimental refers to the certification status of an aircraft, which does not align with the class definitions used in pilot ratings. Thus, the classification as 'single-engine land' is appropriate in the context of pilot ratings, confirming its status as an aircraft class rating.