Quiz - Equipment - J-Valve

[tursiops]

Hi @Pedro Burrito

I have found the discussions around your quiz questions quite interesting, and a nice diversion. Thanks

Agreed, but I'm a bit depressed at how quickly some are able to turn the questions into PADI bashing.

 

[wetb4igetinthewater]

I don't quite get:

a. serve as a warning device, alerting the diver when tank pressure is low.

How does it alert the diver? It doesn't do anything. Breathing just becomes more difficult as it is running out until you open up the reserve. I don't see such an inaction as an action.

 

[TMHeimer]

I don't quite get:

a. serve as a warning device, alerting the diver when tank pressure is low.

How does it alert the diver? It doesn't do anything. Breathing just becomes more difficult as it is running out until you open up the reserve. I don't see such an inaction as an action.

Agree. The J Valve itself doesn't actually alert you, reg breathing hard does. More confusion (NOT PADI bashing as one suggested, just unclear).

 

[tursiops]

I don't quite get:

a. serve as a warning device, alerting the diver when tank pressure is low.

How does it alert the diver? It doesn't do anything. Breathing just becomes more difficult as it is running out until you open up the reserve. I don't see such an inaction as an action.

Agree. The J Valve itself doesn't actually alert you, reg breathing hard does. More confusion (NOT PADI bashing as one suggested, just unclear).

Come on, guys. An SPG doesn't warn you either...you have to look at the damn thing.
You are tripping over your semantics.

 

[scubadada]

Come on, guys. An SPG doesn't warn you either...you have to look at the damn thing.
You are tripping over your semantics.

But, but, but, an AI computer might warn you if you have your alarms on

 

[TMHeimer]

Come on, guys. An SPG doesn't warn you either...you have to look at the damn thing.
You are tripping over your semantics.

Agree. Neither J Valve nor SPG alerts you. But semantics IS the problem with this type of question. Hey, I'm a PADI guy. There are probably unclear questions on other agencys' tests. I had a teacher in 9th grade who purposely put a trick question on his tests (for what reason I don't know). These type of scuba questions aren't "trick" questions per se, just ones where more that one answer can easily be considered correct. It should be clear that only one answer is correct. Plenty of wrong options for B,C and D can be thought of.

 

[tursiops]

But, but, but, an AI computer might warn you if you have your alarms on

Right, they can be set to beep and sometimes vibrate. I can't hear the beep, so need the vibrate.
How is that different from the J-valve? Either way, I have to pay attention to either difficulty in breathing or to a vibration (or to a beep or a flashing light...).
My point is that the J-valve is a warning device that you do not have to look at....unlike an SPG that people seem to be quite comfortable with....but forget to look at....

 

[tursiops]

Agree. But semantics IS the problem with this type of question. Hey, I'm a PADI guy. There are probably unclear questions on other agencys' tests. I had a teacher in 9th grade who purposely put a trick question on his tests (for what reason I don't know). These type of scuba questions aren't "trick" questions per se, just ones where more that one answer can easily be considered correct.

Maybe you are trying too hard to have black-and-white, unambiguous exactitude and clarity.
Consider: What is 2+2?
(a) 4.
(b) less than 5.
(c) more than 3.
(d) all of the above.
I guess there is always the accountant's answer: What do you want it to be?

 

[scubadada]

Right, they can be set to beep and sometimes vibrate. I can't hear the beep, so need the vibrate.
How is that different from the J-valve? Either way, I have to pay attention to either difficulty in breathing or to a vibration (or to a beep or a flashing light...).
My point is that the J-valve is a warning device that you do not have to look at....unlike an SPG that people seem to be quite comfortable with....but forget to look at....

You're preaching to the choir here. On an earlier quiz, I asked how you could surface after violating deco for six minutes without knowing it, not looking at your watch? How can you run out of gas, not look at your SPG? I dived with just a J valve for a couple of years and never ran out of gas

 

[tursiops]

You're preaching to the choir here. On an earlier quiz, I asked how you could surface after violating deco for six minutes without knowing it, not looking at your watch? How can you run out of gas, not look at your SPG? I dived with just a J valve for a couple of years and never ran out of gas

When I started diving in the Baltimore (National) Aquarium many years ago, we had to use J-valves because we were diving under OSHA rules and needed a reserve gas supply. But there were no pull rods, and the mechanisms were disabled. But they were till J-valves....