A number of jobs, such as submarine positions, state that personnel are rigorously screened for claustrophobic tendencies before being given the job. What does this testing actually look like? Putting someone in a small enclosed space for hours and monitoring their heart rate, breathing, etc.?
What about other phobias? For positions like TV tower repair, is it just self-screening (nobody in their acrophobic right mind would apply for a job involving climbing 900-foot towers?)
Many years ago, I did the Sydney Bridge climb. The highest point of the climb is about 440 feet above the harbor and the walkways are metal mesh, so you can see straight down. Before setting off, every visitor had to climb up a metal stairs and walk across a mesh walkway about 12 feet off the floor. I guess they found that was enough to weed out anyone who might freak out or freeze up during the climb.
In Fire academy, week 1, first test: 102’ aerial ladder run up into the air at a 70 degree angle. Climb up, hook our climbing belt on the second rung from the top, let go and lean back letting the climbing belt hold us for 5 seconds, then unhook and climb back down. Failure to complete this was a washout.
A friend of mine did it, too, and he said it was more intense than he expected.
Probably something like this: 
