I guess it would be better to call it a fuse box... not breaker.
I live in a rather old house with k&t wiring. Our box, located in the basement, has all the wiring come in from the top. At the top of the front panel there are two black pull-out things that have markings saying main and off. They are side by side, each one with two fuses below. It seemed to me that just pulling one would kill the power to the two fuses below it, however, as far as I could tell, it killed all power. Does this sound correct?
Also, our landlord said that a house with our type of wiring (knob and tube) does not need to have GFI on our outlets, but I think he is being a bum. Any ansight?