Well I googled and found, but I guess you've seen this,
The test consists of four types of question:
This section assesses the key ability to create and hold onto an image of a shape that retains its true angles and relative proportions. Pupils have to search for a specific shape embedded in one of four more complex shapes.
These questions assess the ability to visualise a three-dimensional object from a two-dimensional drawing and imagine the effect of cutting it in two. Pupils have to pick which option shows the cross-section when a specific cut has been made.
This task extends the process needed for Hidden Shapes to include combining and rotating images of shapes. Pupils have to imagine a number of shapes arranged to create a design.
This type of task assesses the ability to visualise the continuation of a two-dimensional pattern by gauging the position of elements of the pattern that are hidden from view. Pupils have to select how the pattern would look through a hole in the screen which covers part of the pattern.
Looks like a kind of NVR assessment but with a huge bias towards spatial awareness and visual memory?
Something I would not be good at.
Some familiarisation would be helpful so search for spatial awareness and visual memory?