Earlier this month I took my A6 (Electrical) recertification test. This one question has been stuck in my head for the past couple of weeks and I wanted to get some other opinions on how you would have answered this. So here is the question and a couple of options for answers that were available (it was a multiple choice, 2 of them were obviously incorrect)
After charging a vehicles battery a Technician notices the electric cooling fan runs constantly. What is the most likely cause.
A: A short to ground at point A
B: A short to power at point B
"Silver bullets are for killing Werewolves, not fixing Cars." -Rob Longoria-
Tyler wrote: Yeah, I see why this one would stick with you... OK, I'll take a shot.
A short to ground a point A is definitely possible, but why would it happen after changing the battery?
It was after charging the battery
A short to power at point B would also cause the fan to run constantly, but why would that be any more likely than answer A? :huh:
Where's answer C? Where the BCM got 'logic locked' by the low battery voltage? That's WAY more likely than A or B, IMO.
I can't remember off the top of my head exactly what the other 2 choices were but they could be eliminated easily. (opens) All the choices had to do with reading the wiring diagram.
"Silver bullets are for killing Werewolves, not fixing Cars." -Rob Longoria-
I'm saying A. My reasoning being the battery was discharged because the fan was running continuously. Presumably with the key off, that takes the BCM out of the picture for me.
Noah wrote: I'm saying A. My reasoning being the battery was discharged because the fan was running continuously. Presumably with the key off, that takes the BCM out of the picture for me.
I agree with Noah unless the BCM has an after run program designed into the fan
Never mind. A short to power at point B is after the BCM so it doesn't matter what the BCM is doing.
Sorry Noah, I no longer agree
They are both good answers, not sure how you would pick the best one.
ScannerDanner wrote: Never mind. A short to power at point B is after the BCM so it doesn't matter what the BCM is doing.
Sorry Noah, I no longer agree
They are both good answers, not sure how you would pick the best one.
Ahhh yes, good point.
I suppose it comes down to the internal construction of the fan module. More specifically, the transistor. You would think it's ground is constant, considering the module has constant power and ground.
I would say B. because it is a fan Module. If the battery was low the model might not turn the fan on if B was grounded. If A was grounded the fan would run until it drained the battery down to almost 0v's.
When I took the test I chose option A after flip flopping on the answer. I was trying to figure out the "most likely" option. I think I stared at this question for about 5 minutes. I guess I will never know what the answer ASE was looking for, since ASE doesn't let you know what the correct answers are.
I swear the people that make these questions up like to screw with us. :S
"Silver bullets are for killing Werewolves, not fixing Cars." -Rob Longoria-
Ro-longo wrote: When I took the test I chose option A after flip flopping on the answer. I was trying to figure out the "most likely" option. I think I stared at this question for about 5 minutes. I guess I will never know what the answer ASE was looking for, since ASE doesn't let you know what the correct answers are.
I swear the people that make these questions up like to screw with us. :S
Something tells me this one was one of those 'experimental' questions that aren't graded. Truly frustrating, not knowing the correct answer
Tyler wrote:
Something tells me this one was one of those 'experimental' questions that aren't graded. Truly frustrating, not knowing the correct answer
This was a recertification test, I didn't know they had those for that type. All of them were scored.
"Silver bullets are for killing Werewolves, not fixing Cars." -Rob Longoria-
Went to take my own A6 recert test, just so happened to see this exact same question! Skipped right past the part where I agonize and second guess myself, went directly to answer A, didn't look back. :lol:
Took 4 tests this morning. My first time so not a recertification test. I saw this question to. I didn't miss any scored questions on the electrical test but don't know if I got this one right since it could've been a research question
bruce.oliver wrote: Took 4 tests this morning. My first time so not a recertification test. I saw this question to. I didn't miss any scored questions on the electrical test but don't know if I got this one right since it could've been a research question
That's what I'm thinking. Congrats on getting 100%, though!
bruce.oliver wrote: Took 4 tests this morning. My first time so not a recertification test. I saw this question to. I didn't miss any scored questions on the electrical test but don't know if I got this one right since it could've been a research question
That's what I'm thinking. Congrats on getting 100%, though!
bruce.oliver wrote: Thanks. I missed 2 each on suspension and brakes then missed 3 on engine performance
That's really good. I only took the electrical and the engine performance tests and got 100% on each. That's another reason (excuse) I've been putting off the L1. Set the bar too high :sick:
