Transition between Flight Levels and Altitudes. The vertical position of an aircraft at or below transition altitude shall be expressed in altitude (QNH). Vertical position at or above the transition level shall be expressed in terms of flight levels (QNE). When passing through the transition layer, vertical position shall be expressed in terms of flight levels when cllimbing and in terms of altitudes (QNH) when descending.

• After take-off, the vertical position of the aircraft is controlled by reference to altitudes (QNH set) until the Transition Altitude (TA). Thereafter, the pilot shall change the altimeter setting to standard pressure (1013 hPa) and altimeter readings are communicated as flight levels.

Pressure decreases with increasing height. Which means that when the pilot changes the altimeter setting from local QNH (1041 hPa), to a lower pressure (1013 hPa), the altimeter reading will decrease. Altimeter reading = TA - Pressure difference:

1041 hPa - 1013 hPa = 28 hPa
28 hPa x 27 ft/hPa = 756 ft
Altimeter reading = 11 000 ft - 756 ft = 10 244 ft

Closest option: 10 240 ft

Note: According to the new syllabus (EASA 2020) a barometric lapse rate of 30 ft /hPa should be used (instead of 27 ft/hPa). However, if the question text indicates a different lapse rate, that is the one you are expected to use.