Quiz - 17 - Diving Knowledge Workbook - Diving Physiology

[TMHeimer]

Because you are confusing answer with selection. There can be multiple answers but you need to make one selection.

Answer/selection? I d. all of the above is deemed the correct "answer" and I select a. am I marked incorrect and lose points? If all are correct then a. is correct.
Unless it's worded "check all that are correct", but that's not what I consider a true multiple choice question. It also doesn't say "if all are correct you must check d. or it is marked wrong". Semantics, I suppose, but my concept of a true multiple choice question is there are 4 to select from-- one is correct and the other three are wrong.

 

[Akimbo]

I propose using a canary in a diving bell.

There is a serious and interesting connection to history in your comment. The proposal to use canaries to detect toxic and hypoxic environments in coal mines was proposed by John Scott Haldane. This is the same Haldane that conducted the first decompression research for the British Admiralty in the early 1900s.

More information (great book and free): Suffer & Survive: The Extreme Life of Dr J.S. Haldane Kindle Edition

 

[Storker]

Answer/selection? I d. all of the above is deemed the correct "answer" and I select a. am I marked incorrect and lose points? If all are correct then a. is correct.
Unless it's worded "check all that are correct", but that's not what I consider a true multiple choice question. It also doesn't say "if all are correct you must check d. or it is marked wrong". Semantics, I suppose, but my concept of a true multiple choice question is there are 4 to select from-- one is correct and the other three are wrong.

The correct way to read these multiple choice problems is a XOR b XOR c XOR d (all of the above). If d is correct, you don't get participation points for choosing a.

 

[Pedro Burrito]

Spoiler: Answer

c. is odorless and tasteless.

People mistakenly believe that carbon monoxide smells like car exhaust. This is not the case. The smell given off from internal combustion engines results from hydrocarbon emissions. Carbon monoxide itself has no odor. Although a diver will eventually become unconscious, this is not because of any sedative effect, but rather due to hypoxia. Clearly, carbon monoxide is not inert (chemically inactive).

 

[EFX]

Answer/selection? I d. all of the above is deemed the correct "answer" and I select a. am I marked incorrect and lose points? If all are correct then a. is correct.
Unless it's worded "check all that are correct", but that's not what I consider a true multiple choice question. It also doesn't say "if all are correct you must check d. or it is marked wrong". Semantics, I suppose, but my concept of a true multiple choice question is there are 4 to select from-- one is correct and the other three are wrong.

TMHeimer, here is your multiple choice question:

Carbon Monoxide is difficult to detect because it:
a. is odorless and tasteless
b. is odorless and tasteless
c. is odorless and tasteless
d. is odorless and tasteless

 

[TMHeimer]

TMHeimer, here is your multiple choice question:

Carbon Monoxide is difficult to detect because it:
a. is odorless and tasteless
b. is odorless and tasteless
c. is odorless and tasteless
d. is odorless and tasteless

I did get the correct answer on the quiz. But I assume you know my question refers to a question where all 4 are correct but you don't select "all of the above". All in good fun, but curious as to why some questions would have 4 correct answers and you are to choose one. Doesn't seem questions like that need to exist. They're teaching you how to outsmart multiple choice wordings rather than to check your knowledge of the material. I learned how to do that 50 years ago in Jr. High.

 

[scubadada]

Good catch. I answered too quickly and did not RTFQ. On my second, and too late viewing, I had a Homer "D'oh" moment.

You should have looked over at my paper on this one

 

[Akimbo]

I imagine the original test intentionally included "b. has a sedating effect on the diver" as a bit of a trick question . Sedation in the form of confusion and slow reactions are symptoms of hypoxia and hypoxemia, which is the end result of CO poisoning.

 

[TMHeimer]

I imagine the original test intentionally included "b. has a sedating effect on the diver" as a bit of a trick question . Sedation in the form of confusion and slow reactions are symptoms of hypoxia and hypoxemia, which is the end result of CO poisoning.

Yes, that is why I considered voting for all of the above.

 

[Altamira]

Yes, that is why I considered voting for all of the above.

However, "all of the above" was not really a valid option on this question because CO is not an inert gas.