Ok, so i have taken all 120 hours of schooling and Im going through the WDO now. I am using the Ultimate Home Inspectors Tool and i feel like alot of these questions on the tool are subjective and or matter of opinion. This is one of the questions I scratch my head about. Let me know what y’all think and please let me know if you use this tool and if its worth my time? I live in Florida and will be taking a proctored exam soon.
Hi, Jacob. Welcome to the InterNACHI community. Good luck with your endeavors.
It will take you some time to make a living in this profession. Study all the mechanics of getting a home inspection company up and running on 4 cylinders.
A blue flame signifies a properly-functioning oil or gas furnace; any other color indicates a problem with the furnace. In addition to producing more soot, incomplete combustion produces more carbon monoxide (CO), which can cause headaches, nausea and even death if inhaled in large quantities.Dec 17, 2021"
"What should flame look like in oil boiler?
A properly-working oil or gas furnace should have a blue flame; any other color indicates a problem with the furnace. In addition to the increased amount of soot, incomplete combustion releases more carbon monoxide (CO), which can lead to headaches and nausea, and may even be fatal if inhaled in large amounts.Feb 15, 2021"
Note: We don’t have too many, if any, oil fueled appliances where I’m located, so this what I found on the interweb and, right or wrong, I would answer blue.
Funny that two companies’ statements are almost exactly the same? Must attended the same HVAC school…
It appears that the gentlemen that live in the colder climates and that see oil fueled appliance more often, are probably giving the MOST right answer…Orange as the most right answer. Lock it in!!
Thank you all for your contribution and time for my post. The answer they are wanting is orange. I made this post because Internachi says that “ The prep exam contains more than 2,000 questions typically found on state and local licensing exams.” So I’m just wondering
That may be true. I don’t know. However, it wasn’t true for the NHIE exam when I took it…I don’t believe InterNACHI even had any test back then. Even so, the NHIE was a different animal all together.
The flame color changes from red to yellow when it doesn’t get enough oxygen, as occurs with a candle flame. A blue flame signifies a properly-functioning oil or gas furnace; any other color indicates a problem with the furnace
Doesn’t matter who writes the test they are still controlled by their knowledge, experience and biases.
My statement stands. The correct answer to any test is the one that is perceived by its creator to be correct. And that is what you need to know to pass the test whether or not it is the correct real world answer.
And I was/am in agreement with that statement, and my post was an example of your statement being used on this very MB with this very organization.
I know for fact that many times one or more people have posted ‘correct’ answers, but they were ruled incorrect by the “Committee”. I have my suspicions why, but it’s impossible to prove otherwise.
It’s no surprise really why so few members even bother with it anymore.
This is probably because the odds of finding a blue flame in an oil fired system isn’t too common as very specific conditions need to exist. I don’t ever see those systems here, so I can’t say one way or the other with absolute certainty. Fuel oils don’t burn as hot as LP or NG gas which produce blue flame unless there’s a problem or a lot of impurities. Keep in mind that not only do certain materials burn with different color flames, the temperature will also dictate color. Blue is hotter than yellow or orange.
Don’t know if this will help but here’s an interesting rabbit hole
The flame should be of pale blue colour. Some times while using heavy oil as fuel the flame can be pale blue to whitish. The flame should not be yellow or orange in colour. If the flame turns yellow means the air fuel ratio is not correct and combustion is fuel rich.
Just a heads up. The Florida exam is based the book " Principals of home Inspections: systems and standards" by Carson Dunlop. Much of the information on the actual exam has nothing to do with what is covered on the 120 hr course. I finished my 120 hr and then read the book so it would be fresh, multiple times, prior to taking the exam. Focusing on things I felt I wouldn’t be strong on for the subsequent reads. Many people do not pass on their first attempt of the exam because they feel the 120 hr would be sufficient. It is not.
