30-minute practice mock for Chapter 3 Power Plants Engineering (AElE03): 30 MCQs (18 conceptual, 12 numerical) covering hydroelectric power plants (classification, layouts, site selection, water turbines, governing and auxiliaries), diesel electric power plants (site selection, elements and layout), non-conventional generation (solar PV and wind), energy storage (pumped storage, battery, compressed air and flywheel), excitation systems (DC, AC, static and brushless excitation, AVR) and starting of generators (hydro and diesel start-up prerequisites, synchronising and black start)