Explain the process of engine start in the CRJ aircraft.

The process of engine start in the CRJ aircraft begins with electrical power initiation, which activates the aircraft's systems necessary for starting the engines. Once electrical power is established, the next step involves allowing fuel to flow into the engine. This is crucial because without fuel, ignition cannot occur. Finally, the ignition sequence is activated to ignite the fuel-air mixture in the combustion chamber, leading to engine start-up.

This process ensures that all necessary systems are functioning correctly before fuel is introduced. It prevents potential engine damage or inefficiencies associated with starting without proper power and fuel management. Starting with electrical power guarantees that the required controls and indicators are operational, allowing the crew to monitor the start process effectively. Therefore, understanding the correct sequence - which includes electrical power first, followed by fuel flow, and finally the ignition sequence - is essential for a successful engine start in the CRJ.