At pressure altitude 7000 ft, OAT is +21 °C and QNH-indicated altitude is 6500 ft. Assume the mean-layer deviation equals that at flight level; use ISA +15 °C at sea level and a lapse rate of 2 °C per 1000 ft, then 4 ft per 1000 ft per °C temperature correction above a sea-level reference. Round true altitude to the nearest 250 ft. - EASA PPL(A) Theory Exam Questions In English