open collector and totem pole

open emitter and totem pole

open base and totem pole

To compare 2 voltage and report which is larger.

To filter out the analogue signal.

To filter out the digital signal. 

To sum up the voltage.

you should pre test the board with a 0.8mm piece of wire

you should pre test the board with a 0.3mm piece of wire

it doesn't matter if you place your jumper wires across the components

you should avoid placing wires across the components as you will not be able to get your test equipment probes onto the leads of the components

none of the other two answers

tiny "U" shaped springs that clamp on the leads of the components

copper tracks

liquid metal such as mercury that makes a frictionless contact

the wire should be aluminium

the wire should be tinned copper wire

the wire should be gold coated

bend the leads of the component in two to double the thickness

solder leads on the component that are within specification

can plug straight into the bread board

must first be soldered to a carrier board and then plugged into the bread board

cannot be used on a bread board circuit

you can insert them straight into the board with no effect

none of the above

you should cut the part of the lead off that has been in the tape as it has probably been contaminated with glue. This will de-rate the quality of your bread board.

are electrically connected to each other

are not electrically connected to each other. They are conventionally used as supply and ground rails.