Which description best defines a small airplane?

• A. An airplane with a maximum takeoff weight over 300,000 pounds
• B. An airplane designed to carry more than 19 passengers
• C. An airplane of 12,500 pounds or less maximum certificated takeoff weight
• D. An aircraft intended exclusively for military use

Answer: (C)

The important idea here is that a small airplane is defined by weight, not by how many passengers it can carry or by its intended use. An airplane is considered small if its maximum certificated takeoff weight is 12,500 pounds or less. That certification weight is the official limit set by the aviation authority and determines which rules, certifications, and operational categories apply. The other descriptions describe aircraft that fall outside this weight limit: a very heavy airplane is well beyond 12,500 pounds, a design intended to carry more than 19 passengers points to a larger airframe, and something intended exclusively for military use is outside the civilian small-airplane category. Focusing on the weight threshold makes the correct choice clear.