Basic ignition System

The low tension wires rely on a ? v supply from the ignition switch

• 24v

• 30,000v

• 60,000v

• between 30,000 and 60,000v

• 12v

The low tension wires can be switched to earth using one of the following:

• Ignition switch

• Distributor

• electronic ignition

• rotor arm

What effect does the iron core have on the magnetic force generated by the primary coil when the points are closed?

• reduces its impedance

• It amplifies it

• Magnetises the rotor

• switches to negative

Does voltage flow through the secondary circuit whilst the points closed?

• yes

• no

• sometimes

What switch normally supplies voltage to the ignition primary circuit?

• Isolator switch

• Ignition switch

• CDL switch

• Contact breaker points

What normally causes the contact breaker points to open?

• The distributor cam

• The distributor rotor arm

• The base plate

• Distributor cap

What happens in the primary circuit as the contact breaker points open?

• As the points open current stops flowing in the primary circuit. The magnetic force (produced by current flowing through the primary winding) present in the coil assembly now collapses (increases).

• As the points open current stops flowing in the primary circuit. The magnetic force (produced by current flowing through the primary winding) present in the coil assembly now collapses (decreases).

• As the points close current stops flowing in the primary circuit. The magnetic force (produced by current flowing through the secondary winding) present in the coil assembly now collapses (decreases).

What is the purpose of a rotor arm within an ignition system?

• To distribute high voltage generated by the ignition switch

• To distribute low voltage generated by the ignition coil

• To distribute high voltage generated by the ignition coil

A centre electrode is made from?

• Carbon

• Epoxy resin

• Steel

• Wood

The dwell angle relates to what?

• The amount of time the points are closed

• The amount of time the points are open

• The amount of time the points are engaged

• The amount of time the points are disengaged