Can all aircraft land if the ground slope is between 8 and 15 degrees?

The statement regarding whether all aircraft can land on a ground slope between 8 and 15 degrees is false. Aircraft have specific design limitations that influence their landing capabilities, and a ground slope of 8 to 15 degrees exceeds the safe landing angle for most conventional fixed-wing aircraft.

These aircraft are engineered for operations on relatively flat surfaces, typically with a maximum safe slope of around 3 to 5 degrees. Slopes beyond this can create challenges for landing, including difficulties in maintaining control and increased risk of hard landings which could lead to damage.

While helicopters have a unique ability to operate in various environments, including sloped terrain, even they have limitations on the steepness of slopes they can safely land on. Therefore, stating that all aircraft can land on an 8 to 15-degree slope would be misleading and does not reflect the operational constraints and safety considerations involved in aviation.