Exam 26: Ignition Systems

Some spark plugs have electrodes tipped with ____________________ or  ____________________ to extend the life of the plug.

Which of the following is NOT a spark plug thread diameter?

A camshaft position sensor (CMP)is necessary for a waste spark type ignition system to determine which coil to fire when the engine reaches TDC.

Resistor plugs are being discussed. Technician A says that if the original equipment resistor plugs are replaced with nonresistor plugs, the engine will produce more power at high RPM. Technician B says that if the original equipment resistor plugs are replaced with nonresistor plugs, the engine will run smoother at low RPM. Who is correct?

Spark plug design is being discussed. Technician A says a plug with too short a reach makes it difficult to attach the plug wire boot. Technician B says a plug with too long a reach may cause preignition. Who is correct?

Which of the following is NOT a type of engine position sensor?

Most distributor-equipped ignition systems use one ignition coil for each cylinder.

Modern ignition cables contain carbon fiber cores that act as a(n)____ in the secondary circuit to cut down on radio and television interference and reduce spark plug wear.

On a coil-over-plug type ignition system, a faulty coil will affect two cylinders.

Ignition coils are being discussed. Technician A says the primary coil is normally composed of 100 to 200 turns of 20-gauge wire. Technician B says the secondary coil consists of 15,000 to 25,000, or more, turns of very fine copper wire. Who is correct?

What is preignition?

What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?

Resistor-type spark plugs are being discussed. Technician A says the resistor increases the plug firing voltage. Technician B says the resistor helps reduce radio frequency interference (RFI), which can interfere with, or damage, radios, computers, and other electronic accessories, such as GPS systems. Who is correct?

All the following elements except _____ are used in the spark plug center electrode to increase plug life.

Which of the following components is part of both the primary and secondary ignition circuits?

What is the function of the crankshaft position sensor (CKP)?

Which of the following is a component of the secondary ignition circuit?

What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?

The ____________________ on a spark plug help prevent electric arcing on the outside of the insulator.

One of the advantages of a coil-on-plug type ignition system is that it eliminates the need for ______.