Some overhead power lines have a protective covering that them from exposure to the elements. however, the covering does not protect workers from electrocution. if you touch a power line, covered or bare, death is probable.
a) true
b) false

It is true that if someone touches power lines that have protective covering can die.

Explanation:

Here is the fact covered lines conduct a large amount of energy, that energy is not contained by the cover. The energy goes over the cover because it doesn't work as an insulating but as a protective layer. Even birds conduct energy when they touch them, but they don't die because they don't make "land" which is the act o being a transmitter of energy to earth. And that is what kills you. Theoretically, you could touch them and not dying if you didn't make land but it is too dangerous to attempt that act.

i believe your answer is:

quickly

i hope that : )