Ok, I've taken the test.
Preliminaries: here are the design and the pieces of wood, prepared by the workshop technician (me):
And here is the kit of tools I allowed myself. I've added a mortise gauge, plus a screwdriver to set it with, and a dovetail marker. I didn't use the plane in the end. Pete Maddex will recognise the saw. Start time was 10.45. There wouldn't have been time to take wip-style photos all the way through, but I tried to take one every twenty minutes.
This was at about 11.05. I'd sawn 4" off one end, marked out dovetails and cut the tails. I don't really know why, but I decided not to use a coping saw, so I chopped through the central space. This confirmed what I already knew - it would have been much easier if I had used a bit of proper well-behaved hardwood, like walnut or mahogany, not this very soft cedar. Never mind!
Twenty minutes later and I still hadn't finished the dovetails but I had remembered to include the clock in the photo. If I'd used proper wood and a coping saw I would have been further ahead than this.
By the end of the first hour I had got the dovetails looking as if they would fit so I turned my attention to the bridle joint. I marked it out, sawed the sides and set to paring the housings.
I sawed the sides of the slot in the leg and started chopping out the bottom - this would have been a bit quicker with a coping saw or a brace and bit, but only took a few minutes. I used a big handscrew to steady the work and prevent accidental splitting.
Then it was back to the rail for some more cross-grain paring.
And the first of many trial fits.
This was actually the first time I have ever cut a bridle joint. I can see that they are quite tricky - if it's tight, it's hard to see where to remove wood from, so it was a little while before I could risk pushing it all the way home. Fortunately, it didn't split. Here it is, with the dovetail, at the end of my first two hours.
I needed to crack on. I marked out the twin tenons with the marking gauge. I used a 3/8" chisel to cut the tiny little mortises. Quite fiddly, and again, a joint I am not used to making.
I got the mortises to what looked like the right size and then cut the tenons. Much like cutting dovetails - and again, I would have been quicker with a coping saw. Time was running out!
There was just time to mark out the chamfers. I chose to chisel them, rather than plane them, which is quite a nice thing to do if you have a sharp chisel, and even nicer if you are not in a rush.
And then, after a bit of persuasion from the vice and the mallet, my four pieces came together, just inside the allotted time. Phew!
Overall, I really enjoyed the exercise. It made me realise how rarely I concentrate so much for so long - no music, no radio, one coffee drunk on the go, no interruptions or checking the forum on my phone. So for a bit of trendy mindfulness, it was fun.
As for the quality of the work, well, judge for yourself, especially if you took similar exams or taught woodwork. All comments welcome, particularly from anyone who knows how these things would have been assessed. I hope there were points for finishing!
There are obvious faults. I thought I was allowing enough length on the dovetails and tenons for some after-assembly clean up, but they all look a bit short, and I didn't have time to do any. The dovetails and M&T are a bit gappy, outside and inside. Although the bridle joint went together, I suspect the face of the leg is not perfectly co-planar with the rail. The piece with the tenons on should have been cut shorter, but I only realised afterwards, looking at these pictures on screen.
So I know it's not an A-grade, but did I at least pass? And can you do better?