You Do Need power plug adapter while traveling from Costa Rica to Iraq.

Here is Why You Need An Adapter

The outlet and plug type used in Iraq are C, D and G and in Costa Rica are A and B. This is how they look like.

Costa Rica

In Costa Rica, outlets of type A and B are in use.

Type A

Type B

Iraq

In Iraq, outlets of type C, D and G are in use.

Type C

Type D

Type G