Are Carnot Cycle Reversible?

The Carnot heat-engine cycle described is a totally reversible cycle. That is all the processes that compose it can be reversed, in which case it becomes the Carnot refrigeration cycle.

Is a Carnot cycle both reversible and irreversible?

Carnot cycle is a reversible cycle. If the processes are carried out in anticlockwise direction then it will work as heat pump. For all the four process, the cycle will be completed when the isothermal expansion and isothermal compression ratios are same.

Does reversible mean Carnot?

In order to approach the Carnot efficiency, the processes involved in the heat engine cycle must be reversible and involve no change in entropy. This means that the Carnot cycle is an idealization, since no real engine processes are reversible and all real physical processes involve some increase in entropy.