ENAC 3 Dimension Rotations
Neuro-SensomotoricPSY1A chair starts in a slanted position, then 4 turns follow, one at a time. Each turn is a ball with an arrow and an angle, always a multiple of 45°, and you only see the chair itself beside the first one. Then you picture the chair from a named side, say from the right or from above, and pick it out of 5 pictures. The exam format is 40 boards, 5 seconds a turn and 15 seconds to answer.
Overview
Don't try to hold the whole chair in your head. Hold two directions: where the front of the seat points, and where the top of the backrest points. Move both with every turn, and the rest of the chair follows. A turn past 180° is shorter the other way round: 270° one way is 90° the other, and 225° is 135°. Leave the side view to the end, as one more quarter or half turn, and only then look at the pictures.
Assessments
Part of the ENAC EPL selection (PSY1) battery as “Voitures / chaises”.
A chair rather than a car, and many answer on intuition by the end. Forty boards in sequential form: four rotations shown one at a time for five seconds each, at least one of them a multiple of 45° and not of 90° from the very first board, the chair on screen for the first rotation only, a starting orientation that is arbitrary in space, and a point of view to take at the end before choosing among five. The answer window can be five seconds or fifteen, so train both.
Battery mappings are based on public information and may change.
One board: four turns, then a side
- The chair starts in a slanted position, beside the first turn. By the second turn, it’s gone.
- Four turns show one at a time, each a ball with one arrow and an angle from 45° to 315°. Make each turn on the chair in your head as it comes up.
- The side is named in the instruction: from the front, the right, the left, behind, above or below. After the fourth turn, picture the chair from there and pick it out of five pictures.
The three arrows
The ball is fixed to the screen, so a turn is always about the screen’s lines, wherever the chair points. Picture the chair inside the ball, then roll the ball the way the arrow goes.
The chair turns about the up-down line. The near side moves the way the arrow points.
The chair tips about the left-right line. Here the near side rises and the top goes away from you.
The chair spins about the line from your eye to the screen, clockwise or anticlockwise as you see it.
A board to work through
Here the turns wait until you move on. Pick a picture, then hit Check.
Turn the chair, then find it seen from the left
Turn 1 of 4
Game Phases
Read the Start
Before the chair goes, tell yourself where the front of the seat and the top of the backrest point.
Turn Two Directions
Move the seat front and the backrest top with each turn, taking the short way round.
Change Sides Last
After the last turn, make the quarter or half turn the named side asks for.
Check the Legs
When two pictures share the seat front and backrest top, the legs settle it.
More Practice
Spatial Orientation
11 exercisesSpatial Awareness
Visualise a 3D shape from a fixed viewpoint and pick the matching 2D view. Tests mental rotation and spatial perception under time pressure.
Mental Rotation
See a 3-D block figure, then pick the option that is the same object rotated — not a mirror image or a different shape. The classic Shepard–Metzler / Vandenberg–Kuse task.
Spatial Orientation
Read your compass heading and a beacon's bearing, then judge where the beacon lies relative to your aircraft. Tests spatial orientation and sense of direction under time pressure.
Cube Folding
Mentally fold a flat net of six symboled faces into a cube, then pick which of four folded cubes it makes. Tests spatial visualisation and 2D-to-3D reasoning under time pressure.
Sense of Direction
One arrow shows your vehicle's new heading; you name the driving maneuver that got you there — straight, left, right or U-turn — on a circular four-wedge control. A practice version of scales nav, Aon's (cut-e's) Sense of Direction test: one minute, arrows chaining item to item, your heading held only in memory, plus a sudden-death Challenge mode.
ENAC Tetralogy of Angles
Read which way a small clock runs, then measure the turn from one line to another in that direction. In the ENAC EPL form you type 40 angles in four parts of 10: over a picture, between an arrow and a point, around a cross, and as an object to straighten. In the Air France Cadets form you get a figure and 8 clocks, each printing a value, and you tick every clock that matches the angle.
ENAC Point Tracking
Two figures side by side. The round one holds a few circles and four points lettered A to D. The square one is the same figure, turned in the plane and moved, with only one of the four points left and sometimes a circle or two added. You name the point that was kept. The exam format is 32 boards in 6:30 on one clock.
ENAC Objects Tracking
Two pictures, one above the other. In the lower one, an object is circled and five more carry the letters A to E. The upper one holds the same objects moved over together, among plenty of others. Tick the letters still at the same distance and direction from the circled object, and still exactly the same. The exam format is 30 boards in 12 minutes.
ENAC Patrons de Dés
A die with a letter or a rune on each face, two or three views of it, and its net laid flat with the cells numbered. Type under each symbol the number of the cell it goes in. The symbols are already turned the way they lie on the net, so the cell you pick decides how each one sits on the die. The exam format is two parts of 10 boards, 20:00 a part for Air France Cadets and 17:00 for the ENAC EPL.
ENAC Cube Nets 2D/3D
Two nets of the same die side by side: the original, complete, and yours, unfolded from the die turned another way, with a few faces in place. Drag the other faces onto yours so that it folds back into the same die, and turn the letters the right way round. The exam format is 5 boards, 90 seconds each.
ENAC Viewpoint Finder
A photograph shows a few simple solids standing in the sand. Beside it, the same scene is drawn from directly above, with eight camera positions round it, and every camera looks at the centre. Click the position the photograph was taken from. The shadows, the left-to-right order of the objects, and the objects you can't see all tell you where you're standing. The exam format is 10 boards with 20 seconds each.