1. You go to pick up your nitrox tank at the dive shop and it is labeled 35.2% O2. You should plan to dive with this nitrox mixture to a maximum depth of: a. 99 feet b. 95 feet c. 90 feet d. I don't know the answerAbsolutely a "trick" question, designed to point out the kind of information that an instructor would be expected to emphasize, that may not always be so clear from reading in "the book".1. You should never trust the shop to analyze your tanks and label them without you standing there watching. (Even better would be to use your own analyzer.) Correct answer would be "d" - I don't know what the maximum depth would be since I'm not sure what gas I actually have.2. Second question points out that before doing a nitrox dive, you should know the MOD (PPO2 1.4) and the Contingency depth (PPO2 1.6) when using nitrox. You should know that in an emergency situation 115 feet would be ok with 36% nitrox (of course for limited time and trying to limit exertion at the depth).