Ignition Systems, Fuels, and Emissions

Ignition systems consist of two interconnected circuits - a primary circuit and a secondary circuit. Which is the high-voltage circuit?

• Primary circuit

• Secondary circuit

• They have the same voltage

These two circuits are typically housed within which component?

• Spark plug

• Spark plug wires

• Ignition coil

• PCM

All vehicles contains exactly one ignition coil

• True

• False

What part of the spark plug is #2?

• Centre electrode

• Side electrode

• Terminal

• Insulator

What part of the spark plug is #5?

• Centre electrode

• Side electrode

• Terminal

• Insulator

The spark plug terminal is marked with what number?

• 1

• 3

• 7

• 5

These materials are commonly used for spark plug terminals (three answers)

• Copper

• Platinum

• Iridium

• Ceramic

• Aluminum

Waste spark ignition systems utilize one ignition coil per __ cylinders

• 1

• 2

• 3

• 4

The ideal mixture of air to fuel to promote complete and efficient combustion is called

• Stoichiometric

• Hygroscopic

• Hypoeutetic

• Piezoelectric

For gasoline, the stoichiometric ratio of air to fuel is:

• 14.7 : 1

• 18 : 1

• 8 : 1

• 14.7