more homework help

[camuhrun]

i posted before about questions i have on my homework from scuba class...so here's this weeks questions......i've looked in the book but it does not come right out and say it exactly.

When doing a bouancy check at the surface w/ a deflated BC, a diver will need to ____ if he sinks too rapidly when holding normal breath. I think that it is Add air to the BC or remove some weight. i'm not exactly sure. i'm leaning more toward remove some weight b/c i think w/ your lungs full of air you should not be sinking rapidly.

Stress can affect us mentally and physically. what PHYSICAL reactions can occur in the body that can put a dover in an unsafe situation? ...the books says physiological changes include breathing rate and heart rate increase, nervous system more active, and awareness decreases. the choices are a) ear probs, seasick, breathing changes b) breathing, circulation, awareness changes c) low core temps, breathing, and awareness changes d) circulation, dizziness, breathing changes. I chose B because it has the heart and circ increases and awareness changes, but i does not have the nervous system one i dont think. i'm not exactly sure what happens when your nervous system becomes more active

As a diver descends, the water pressure compresses the closed gas cells in the wet suit. this reduces bouyancy, which should be offset by: a) reducing weight on weight belt b)add more air to BC c) inhaling more from the tank d) exhale more from lungs........well d is ruled out automatically b/c if your bouyancy is reduced then you sink, correct? and when you exhale you are just going to sink more. i don't think c is an appropriate answer. i chose B and A, well, you can't really just get rid of weight while you are descending unless you absolutley have too but its not too practical.

thanks!! sometimes i think i read too much into the question. i can't help but to read through each answer and figure out why it would work or why it would not.

thanks again!

 

[texdiveguy]

Based on your above questions----
Reduce the wt.
D
BC

 

[DCDivenut]

i posted before about questions i have on my homework from scuba class...so here's this weeks questions......i've looked in the book but it does not come right out and say it exactly.

When doing a bouancy check at the surface w/ a deflated BC, a diver will need to ____ if he sinks too rapidly when holding normal breath. I think that it is Add air to the BC or remove some weight. i'm not exactly sure. i'm leaning more toward remove some weight b/c i think w/ your lungs full of air you should not be sinking rapidly.

Your instincts are correct... the idea of a bouyancy check is to get yourself to the minimum amount of weight needed for your rig.

Stress can affect us mentally and physically. what PHYSICAL reactions can occur in the body that can put a dover in an unsafe situation? ...the books says physiological changes include breathing rate and heart rate increase, nervous system more active, and awareness decreases. the choices are a) ear probs, seasick, breathing changes b) breathing, circulation, awareness changes c) low core temps, breathing, and awareness changes d) circulation, dizziness, breathing changes. I chose B because it has the heart and circ increases and awareness changes, but i does not have the nervous system one i dont think. i'm not exactly sure what happens when your nervous system becomes more active

I think you are on track here as well. This is one of those great multiple choice questions that had no real "correct " answer (IMO) but simply ones that are more right, especially since the factors that can contribute towards any of these are complex and diverse.

As a diver descends, the water pressure compresses the closed gas cells in the wet suit. this reduces bouyancy, which should be offset by: a) reducing weight on weight belt b)add more air to BC c) inhaling more from the tank d) exhale more from lungs........well d is ruled out automatically b/c if your bouyancy is reduced then you sink, correct? and when you exhale you are just going to sink more. i don't think c is an appropriate answer. i chose B and A, well, you can't really just get rid of weight while you are descending unless you absolutley have too but its not too practical.

Ditching weight during a descent is not realy a viable option as you say.. besides if you have done your bouyancy check you will need it on the surface, right? B is the answer since adding air to your BC is reversible while ditching weight is not!!

Hope this helps.. YMMV
thanks!! sometimes i think i read too much into the question. i can't help but to read through each answer and figure out why it would work or why it would not.

thanks again!

..

 

[Tom Smedley]

What certifying agency are you taking a class with. If we knew that we could look in the key and get an answer that is what they want to hear........

i posted before about questions i have on my homework from scuba class...so here's this weeks questions......i've looked in the book but it does not come right out and say it exactly.

 

[MB]

When doing a bouancy check at the surface w/ a deflated BC, a diver will need to ____ if he sinks too rapidly when holding normal breath. I think that it is Add air to the BC or remove some weight. i'm not exactly sure. i'm leaning more toward remove some weight b/c i think w/ your lungs full of air you should not be sinking rapidly.

OK, here's a way to think about this. What's the purpose of doing a buoyancy check? To determine how much weight you need on your belt. What you learned was that you should start out in a neutral state. If you're too positive when you should be neutral, then... If you're too negative when you should be neutral, then...

Sometimes test questions sound weird. Before you just look it up, consider what the purpose of the question is - i.e., what's the concept behind the question. In this case, you're trying to learn a procedure for telling you if you have the right amount of weight. Thus add or remove weight depending on whether you are positive or negative when you should be neutral.

(OK, so I didn't give you the right answer either...)

 

[SubMariner]

i posted before about questions i have on my homework from scuba class...so here's this weeks questions......i've looked in the book but it does not come right out and say it exactly.

THIS week's questions? Not that we don't want to help out here on SB, but shouldn't you be asking your Instructor these questions?

Perhaps you might want to schedule some time with h/h to go over your questions and review the course materials more closely. I'm sure that will help demystify things a bit for you.

Bonne chance,