Okay, you asked for input, so here goes a long one. Don't take this to mean I didn't like it. I'm just rather thorough when I comment on things. :biggrin:
Question 8: "Trimix consists of what?"
The question and answers are broken. If you want the right answer to be "2 Inert Gases and Oxygen" (by the way, spell out "two"), do not include the also-correct answer "Nitrogen, Helium, and Oxygen". There should only be one correct answer to each question, but this question has two correct answers. Additionally, if you accept any two inert gases in your definiton of trimix (as the answer key states), "Nitrogen, Argon, and Oxygen" would *also* count as a correct answer (although who would want to dive that?
).
Question 9: "What is the common physiological factor in pressure-differential barotrauma?"
The question is poorly phrased. Replace "is the" with "are two", and what's a "factor"? Also, isn't "pressure-differential barotrauma" redundant, as all barotrauma is, by definition, the result of pressure differentials. Something like, "Two parts of the body susceptible to barotrauma are:" would sound less odd. (If the question was a direct quote from a class text, I'd have to dislike the phrasing in the text as well. :biggrin
Question 10: "Define this law or principle."
First, you're not *defining* it. You have the definition, so you're *naming* it. Secondly, "this law or principle" is unnecessarily complex. Changing the question to "Name this concept: '(definition)'" would be easier to parse.
Question 12: "The density of freshwater is?"
Needless display of unwarranted precision. Just use one decimal place: 62.4, etc. It's easier to read and remember, and you likely don't really mean to say that a cubic foot of freshwater always weighs 62.43 pounds to the sixth of an ounce, right?
Question 15: "...cannot..."
True/false questions with negations in them tend to be confusing, but I don't really like the question, anyway. Perhaps replacing it with a question about causes of lung overinflation would better test the knowledge (breath-holding, obstructions, asthma...).
Question 17: "...absolute zero..."
The question is broken. *Absolute zero* is always at the same temperature (-459.67°F, -273.15°C, 0°R, 0 K -- note, never say °K), so *every* temperature scale places absolute zero there. If you'd left out the 'F' and asked, "The _____ temperature scale places absolute zero at -459.67°", the correct response would be "Fahrenheit".
Question 18: "... Define this law or principle."
As in my comments on question 10, rephrase the question. Whether the definition was a direct quote or not, "weight" should be changed to "mass" or "amount" in order to be unambiguous. (Otherwise, you'll have to add in something like "at a given acceleration". :biggrin
Also, there's an 'H' stuck in there near the end of the quoted definition.
Question 21: "What is and advantage of pillow bags in salvage work?"
There is no correct answer. Pillow bags are not unique in not needing to be manually vented. Isn't the primary advantage of pillow bags that they cannot accidentally vent at the surface (and send the lift crashing back down)? (Open-ended bags could potentially spill air depending on lift and water conditions.) That would seem to be a reasonable answer to use.
Question 23: "...will almost certainly lead to..."
This question is also broken. It does not adversely impact the question to phrase it as "can lead to", which would preclude any debate as to the certainty of alternobaric or alternothermic vertigo. (I have had numerous occasions to experience *significant* temperature differentials, not to mention the occasional poorly-equalizing ear, and I have not once experienced vertigo. It is certainly possible, but saying "almost certainly" is unsupportable.)
Question 24: "1.58:1"
Where is this number coming from? 20 fsw would be 1.6:1. To say "1.58:1", you would need to justify the precision. (The difference is something like 8 inches of depth.) Also, the question says "ration" instead of "ratio", and I don't think we're talking about MREs.
Question 36: "...perform a proper surface."
You probably want that to say "ascent" or "ascent to the surface", as the emphasis is on safely ascending after looking for a minute, not on the style with which you splash into the air. :biggrin:
Question 37: "...topping the tank of with..."
Simple typo. Topping it "off", not "of".
Anyway, that's about all I noticed running through it. The only other thing I can say is that I find the waving "Sound Dive Center" and "Master Diver Quiz" unbelievably distracting and annoying.
Thankfully, I have Flashblock in my browser, so I didn't have to hurt anyone.
It's probably the fact that I spend so much time reading wonderfully static printed material (books especially), but whenever I'm on a page with gratuitous motion, it constantly grabs my eyes away from what I'm trying to pay attention to. (It's like having someone keep borrowing the eraser from your desk while you're trying to take the SAT.) I'm certainly not going to tell you how to do web site design, since that's all personal preferences, but if you make static graphics just for the quiz page, you'll have at least a few gratefully non-distracted quiz-takers. :biggrin:
