Question id 149 - Performance - ATPL - Airline Transport Pilot license

Executing a desired step climb at high altitude can be limited by buffet onset at g-loads greater than 1
A step climb is executed in principle when, just after levelling off, the 1.3g altitude is reached
A step climb is executed because ATC desires a higher altitude
A step climb must be executed immediately after the aeroplane has exceeded the optimum altitude