Copyright Goodheart-Willcox Co., Inc. 219 5. True or False? Current flow through the primary windings of an ignition coil builds up a magnetic field. 6. Where is the power transistor located in the ignition system? (A) Pickup coil assembly. (B) Ignition control module. (C) Ignition coil. (D) Ignition switch. 7. True or False? In a late-model vehicle, an electronic triggering device sends a signal current to the ignition control module, which then breaks the primary circuit. 8. Electronic triggering devices are operated by rotation of the _____. (A) distributor shaft (B) crankshaft (C) camshaft (D) All of the above, depending on the design. 9. In a Hall-effect switch, what is placed between the sensor and magnet to interrupt primary current and cause it to fire? (A) Distributor. (B) Reluctor. (C) Shutter. (D) Waste spark. 10. All of the following components are part of an optical sensor electronic triggering device, except: (A) photosensitive diode. (B) rotor plate. (C) relay. (D) light-emitting diode. 11. True or False? In a waste spark ignition system, a spark plug in a single engine cylinder is fired during three strokes of the four-stroke cycle. 12. Direct ignition systems do not use _____. (A) spark plug wires (B) ignition coils (C) an ignition control module (D) a 12-volt battery 13. A six-cylinder engine equipped with a direct ignition system has how many ignition coils? (A) 1 (B) 2 (C) 3 (D) 6 14. All of the following statements are true regarding a dual coil-on-plug ignition system, except: (A) the system has one ignition coil installed per cylinder. (B) each ignition coil is wired to another plug in another cylinder. (C) the system uses two spark plugs per cylinder. (D) every coil and plug fires four times during one crankshaft revolution. 15. What are the three major parts of a spark plug? (A) Electrodes, insulator, and shell. (B) Integrated circuit, relay, and shell. (C) Insulator, relay, and shell. (D) Electrodes, diode, and semiconductor. 16. True or False? A spark plug gap of 0.025″ (0.63 mm) would be found on a late-model vehicle. 17. If the spark plug heat range is too cold, what could happen? (A) Spark plug fouling. (B) Cylinder head weakening. (C) Detonation. (D) Weak spark. 18. Using a resistor spark plug reduces electromagnetic interference and _____. (A) spark strength (B) spark brightness (C) spark plug electrode deterioration (D) spark plug gap 19. True or False? As engine speed decreases, ignition timing must be advanced a few degrees before top dead center. 20. True or False? When the engine is being cranked, timing must be at or near top dead center.