The image given for this
question is drawn exactly as it appears in the JAA Airframe System 021
examination.
You are told in the
question that the image represents a type of gas turbine engine.
You can see that there
are two shafts in the image yet they are clearly not connected to each other.
The two vertical oblongs
at the ends of the shafts represent turbines.
This would indicate that
this is a Free Power Turbine Engine.
The triangle shaped
section drawn at the left represents a centrifugal compressor.
It is a basic diagram we
agree, this image is based on the PT6 engine, you may
wish to look at cut away diagrams of the actual engine on the net.
We think you will then
see why the JAA use such a simple diagram for the examinations.