In the __________ coil, there is one coil per cylinder.

In the __________ coil, there is one coil per cylinder.

• A. Distributor
• B. Waste spark
• C. Coil-per-plug
• D. Direct ignition coil

Answer: (C)

Ignition system layout and how coils connect to cylinders is what this question tests. In a coil-per-plug setup, each cylinder has its own ignition coil, typically mounted directly on top of the spark plug (often called coil-on-plug). This gives a direct, independent high-voltage path for every cylinder, providing precise timing and strong spark without a distributor. By contrast, a distributor system uses a single coil and a rotor to send the spark to plugs in sequence, while a waste-spark system fires pairs of cylinders with one coil, so there isn’t a coil dedicated to each cylinder. Direct ignition coil can describe coil-on-plug implementations, but the key feature here is one coil per cylinder. That’s why coil-per-plug is the correct description.

Ignition system layout and how coils connect to cylinders is what this question tests. In a coil-per-plug setup, each cylinder has its own ignition coil, typically mounted directly on top of the spark plug (often called coil-on-plug). This gives a direct, independent high-voltage path for every cylinder, providing precise timing and strong spark without a distributor. By contrast, a distributor system uses a single coil and a rotor to send the spark to plugs in sequence, while a waste-spark system fires pairs of cylinders with one coil, so there isn’t a coil dedicated to each cylinder. Direct ignition coil can describe coil-on-plug implementations, but the key feature here is one coil per cylinder. That’s why coil-per-plug is the correct description.