L
LittleEd
Hi I am due to start the city and guilds 2394 course next month. I thought that I would have a look at some past questions to see what to expect. I am having trouble with one of the questions and was wondering if anyone could explain the theory to me.
16) The measured value of loop impedance for a circuit is 0.83Ω. If the temperature at the time of the test was 20C and the cable is 70C (factor 1.2) what is the corrected value. Ze = 0.4Ω
a) 0.43Ω
b) 0.86Ω.
c) 0.996Ω.
d) 0.916Ω.
I am using this formula to work out the question ZStest=1/1.20 x {Zs +Ze (F-1)}
I know the answer is 0.916 by cheating and looking at the answers, but i have no idea how they came to that answer. am I using the wrong formula and if i am where can i find the right on?
Thank you in advance
16) The measured value of loop impedance for a circuit is 0.83Ω. If the temperature at the time of the test was 20C and the cable is 70C (factor 1.2) what is the corrected value. Ze = 0.4Ω
a) 0.43Ω
b) 0.86Ω.
c) 0.996Ω.
d) 0.916Ω.
I am using this formula to work out the question ZStest=1/1.20 x {Zs +Ze (F-1)}
I know the answer is 0.916 by cheating and looking at the answers, but i have no idea how they came to that answer. am I using the wrong formula and if i am where can i find the right on?
Thank you in advance