In a circuit diagram, a black dot at a junction of wires represents:

• Crossing wires without connection

• A switch

• A connected node

• A short circuit

When two wires cross without connecting, the symbol used is:

• A dot

• A loop/hop

• A zigzag line

• A rectangle

In a single-cell battery symbol, the long line represents:

• Negative pole

• Positive pole

• Ground

• Fuse

A battery with multiple cells is represented by:

• Two parallel lines only

• Several pairs of long and short lines

• A zigzag line

• A circle with “B”

Which symbol represents an AC power supply?

• Straight lines

• Sine wave

• Dotted circle

• Zigzag

The function of a fuse is:

• To increase voltage

• To store energy

• To protect circuits from excessive current

• To amplify signals

If the fuse rating is exceeded, it will:

• Increase resistance

• Melt and open the circuit

• Shorten the wire

• Act as a switch

A push-button switch symbol is used for:

• Slide switches

• Momentary contact switches

• Grounding

• Lamps

The ground symbol usually indicates:

• Positive voltage

• Negative current

• 0V reference or Earth ground

• A capacitor

What is the color code of grounding wires?

• Red-Black

• Yellow-Green

• Blue-White

• Brown