I tried to take this libertarian test back when Czar first posted it, and I gave up because of the overly-generalized questions that didn't allow me to answer many of the questions in any way I felt were adequate, and I still can't do it.
"Are taxes too high?" As a middle class person, it's not that my taxes are too high. It's that people in the income levels above me pay very little (most of them), and those below me pay very little (rightly, since they don't have much), while I pay a sizable chunk of my income. In exchange, the wealthy get all kinds of friendly tax breaks, for investments, for rental properties they own, etc. The working classes get welfare and other government aid (not enough of it, but they still get something). I'm supposed to be benefiting from things like improved infrastructure and better economies, but it doesn't happen. I pay money in taxes, the roads go to shit, the housing market gets farther and farther out of reach, and my rent and food prices keep going up. So are taxes too high? Yes and no, equally.
"Are zoning laws too strict?" This depends entirely on where you live. In some cities, you can't even put up a garden shed without filing 24 different forms and paying for 13 different inspections. In other places, you can practically build a skyscraper without talking to a single bureaucrat.
"Would school vouchers be an improvement over government schools?" Better than the current shit-filled mess? Yes. But the whole mess is because half the government wants to make public schools shitty so that they can get voucher schools approved. The other half of government just wants to throw money at inner city schools and hope that fixes all the problems. That wouldn't change just by having school vouchers. The way to fix it is by applying ourselves to a solution, instead of trying to put on bandaids here and kick the stool out there.
It's not that yes/no questions on political tests can't work, it's that the questions need to be formulated in a way that they can be answered at least relatively well. I guess I shouldn't expect more than childish black and white views from anyone who develops an ideological purity test.