Maximum takeoff weight is described as being limited by

• A. It is fixed and cannot be exceeded.
• B. It varies with weather.
• C. The most restrictive of the other listed conditions.
• D. It depends on crew preference.

Answer: (C)

Maximum takeoff weight isn’t just a single fixed number you always use. It’s the weight limit imposed by multiple factors that affect takeoff performance, so you must take the lowest limit that applies at the moment. In practice, the aircraft has a structural MTOW, but the actual allowable takeoff weight is the most restrictive value among all active constraints—such as runway length, altitude, temperature, wind, and obstacle clearance. If any one of these factors limits you more than the structural limit, that tighter value becomes the actual maximum you can use.

So the right idea is that the maximum takeoff weight is determined by the most restrictive condition among the applicable limits. Crew preference isn’t a factor, and it’s not correct to say it’s fixed or governed solely by weather, since the governing limit is the lowest among all constraints.