DM Exam Preparation

[CTDiver01]

I recently started the DMC program at my LDS and we are "diving" into the classroom and test material right away since the season is ending for class checkouts. So now I am getting ready for my first two exams - Physics and Physiology. Might as well get them done first right.

Does anyone have any practice tests or practice questions? I have done the ones in the workbook and am studying the written materials. For me, repetitive practice makes it sink into my thick skull.

Thanks in advance for your help. I am really looking forward to joining the professional part of diving. And ready for the fame and fortune that goes along with it

 

[oly5050user]

use the "diving knowledge workbook" along with the encyclopedia of diving and you will haveno trouble passing exams.

 

[RJP]

use the "diving knowledge workbook" along with the encyclopedia of diving and you will haveno trouble passing exams.

Agreed.

 

[James R]

The tests are not really close to as bad as people make them out to be. Just remember to read the whole question and the whole answers -- like all the rest of the tests you've take up to now.

There's a good thread in this forum info stuck at the top.

Or you can just go to my website and download the pdfs of all 8 DM exams and study with them.



hehe

I kid, I kid!

 

[TMHeimer]

I just took the tests. Know the pressure/volume stuff. Know the ear stuff. Read especially the Encyclo. spots that the Workbook mentions. Re the Divemaster Conducted Programs--Read over thoroughly the stuff on the CD Rom. Can't believe I missed 2 questions on an "open book" test--I'd swear the answers weren't anywhere in the CD Rom. But I probably just couldn't find them. Good luck.

 

[CTDiver01]

Thanks everyone!!!! I really appreciate the help.

 

[CTDiver01]

James R - I'm still laughing at your "site" with all the DM exams. I had to click just to make sure....now I know it doesn't come that easy.

 

[SailNaked]

ok I just took my physics exam, and while I do not feel that the whole section is very relevant to diving and is more about math I did answer a question correctly using math and not knowledge so please help me out.

the question was something like:

a diver uses 46psi/Min at 106 ft how much will he use at 56 ft (same tank but size not given). so I did a math trick and simply cross multiplied and got (46)*(56)=x(106) and then solved and got 24.3psi while this was the correct answer (for this not the test) I assume there was some other method I was supposed to use. I suppose I could have converted psi to F3 then changed depth then recalc psi but I had left it to last and got in a hurry.

 

[NvScubaSteve]

SailNaked:
I agree that the math you used does result in the number 24.3 however I do not know if that is actually the correct answer for the problem presented. I am preparing for my physics exam next week and am curious if somebody more familiar with this problem can assist.

I got the following as a solution however I am not saying I am right, hopefully an insturctor can work through this an help us out.

I am assuming we are dealing with sea water, not that it makes a huge difference in this question but I try to be as detailed as possible.

106 ft sea water is 4.21 atmospheres absolute pressure. (106/33+1)
56 feet is 2.69 atmospheres absolute pressure. (56/33+1)

The divers consumption rate of 46psi/min will be 4.21 times less at the surface (Boyles Law regarding gas density). Resulting in a surface consumption rate of 10.9 psi/min (46/4.21).

The diver taking his surface consumption rate of 10.9 to a depth of 2.69 atmospheres (56feet) absolute will use 2.69 times more air at this depth which is 29.32 psi/min. (10.9x2.96)

I am not a physics wiz and I am very much still learning this stuff but this is how I would solve the problem you presented, although I may be a poor lost soul in the world of diving physics as many other DMCs are when getting ready for this part of the program.

S

 

[SailNaked]

I would think your solution is correct as you seem to follow what I would have done if I could have remembered it on the test. however I did not and used simple math, cant say why our answers do not match however I did get the correct answer on the test using about the method I presented (I may have converted the depth as you did to atmospheres first and then cross multiplied).