Transformer Test Question

[FrancisDoody]

This is a question that was presented on a Journeyman's exam this week. The question never mention the primary or the secondary, It simply said that a transformer has 1.25 volts per turn. There are 192 turns. So the first thing someone would do is multiply 1.25 times 192 and the answer is 240 volts. Well there it is right next to the letter C. So you circle it and move on. Well after finishing the test you start your review and this question pops up again. That answer is to straight forward for a test. A transformer has a ratio. Most are 2:1. So if the primary is 240 volts and the ratio is 2:1 the answer would be 120 volts. 120 volts happened to be answer B. The trouble is that with such limited information you will never be able to agree on the correct answer. There is no way to ask the state for the answer unless you fail the test and sit for a review. So I quess we will never know. Has anyone else had that same question from the ocean state.
Thanks,
Fran

 

[wbalsam1]

Here are a few "things" that get me about this practice....1) There's usually something riding on a test like this, for example a much-needed job, promotion, etc., 2) There's quite often an expense involved either in getting to the test site, taking off from work or paying a fee for the exam, 3) it's all too frequently composed/authored by someone without "in-the-field" knowledge of the way to structure the question, 4) the re-exam starts the ball rolling all over again.....ad libitum....ad infinitum..... :roll:
This mentality/methodology is not limited to the Ocean State, it is rather pervasive in the Empire State as well.....:grin:

 

[brantmacga]

This is a question that was presented on a Journeyman's exam this week. The question never mention the primary or the secondary, It simply said that a transformer has 1.25 volts per turn. There are 192 turns. So the first thing someone would do is multiply 1.25 times 192 and the answer is 240 volts. Well there it is right next to the letter C. So you circle it and move on. Well after finishing the test you start your review and this question pops up again. That answer is to straight forward for a test. A transformer has a ratio. Most are 2:1. So if the primary is 240 volts and the ratio is 2:1 the answer would be 120 volts. 120 volts happened to be answer B. The trouble is that with such limited information you will never be able to agree on the correct answer. There is no way to ask the state for the answer unless you fail the test and sit for a review. So I quess we will never know. Has anyone else had that same question from the ocean state.
Thanks,
Fran

i had a few of these on my amp test. there was a comment space on the back, and i USED it FREQUENTLY. they take that into consideration when grading the test.

 

[S'mise]

If all is said was:transformer has 1.25 volts per turn. There are 192 turns?

I presume it asked what the voltage is? The trick is not reading any farther into the question than they tell you. Did they mention anything about a primary or secondary? No? Then all tou have is 1.25v per turn at 192 turns, on the same winding. Answer is 240v

 

[tomP]

The question never mention the primary or the secondary, It simply said that a transformer has 1.25 volts per turn. There are 192 turns. Fran

Just out of curiosity what was the question?
What is the voltage? Of what? There had to be a question part.
Not having all the info on the question puts everyone at a disadvantage in knowing what they were looking for.
Not saying it would help either, just trying to rationalize what they were asking.

 

[FrancisDoody]

What is the voltage of this transformer

What is the voltage of this transformer

What is the voltage of this transformer. That was the question.