Answer:
What is never used unless it's in a tight place?
Put into a pit, locked beneath a grate, guarded through the night, yet it still goes out.
What doesn't get any wetter, no matter how much rain falls on it?
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
I always follow my brother but you cannot see me, only him. You cannot hear him but you can hear me. What are we?
If lightning strikes an orchestra who is the one most likely to get hit?