A 120 wire cable has been laid firmly undergr ound between two t elepho ne
exchanges located 10k m apart.
Unfortunately after the c able was laid it was discovered to be the wro ng type, the
problem is the individual wir es are not labelled. There is no visual way of knowing
whic h wire is whic h and thus co nnections at eit her end is not immediat ely possible.
You are a trainee technician and your boss has asked yo u to identify and label the
wires at both ends witho ut ripping it all up. You have no transpo rt and only a batt ery
and light bulb to test co ntinuity. You do have tape and pen for labelling the wires.
What is t he shortest dist anc e in k ilo met res you will need to walk to co rr ectly identify
and label each wir e?
(a) 17 (b) 15 (c) 10 (d) 20

• the distance is 10 km...answer
• 12 years agoHelpfull: Yes(5) No(1)
• 120 wire cable has laid firmly in the 10 km.. so ans is 10.....
• 12 years agoHelpfull: Yes(3) No(3)