ATPL: At a high ambient temperature (+ 30° C) and with a relative humidity as low as 40 %, in clear air, free of fog and precipitation, serious carburettor icing:
Question 239, Operational Procedures - ATPL - Airline Transport Pilot license
Can occur, but only at a low power setting
Is possible at any setting
Can occur, but only at full power or cruise settings
Explanation: At a high ambient temperature (+ 30° C) and with a relative humidity as low as 40 %, in clear air, free of fog and precipitation, serious carburettor icing: