Final answer:
The most common thrust reverser found on turbojet engines is the Cascade-type, which uses cascade vanes to redirect exhaust flow forward.
Step-by-step explanation:
The most common type of thrust reverser on a turbojet engine is the Cascade-type. This reverser utilizes a series of cascade vanes to redirect the exhaust flow forward, helping to slow down the aircraft during landing. The Clamshell-type (also known as the Bucket-type) used to be more common on older engines and features two doors that swing closed to redirect the exhaust flow. The Target-type is similar in concept to the Clamshell-type, but instead of doors, it uses a 'target' that moves into the exhaust stream to produce reverse thrust.