The primary circuit in an ignition system is considered to be:
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The secondary circuit in an ignition system is considered to be:
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Wrong!
Technician A says that the opening of the points in an ignition circuit causes the magnetic field surrounding the primary windings in the coil to collapse. Technician B says that the collapse of this magnetic field induces a high voltage in the secondary windings. Who is correct?
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Arcing of the ignition points is caused by a spike of induced voltage in the primary windings. To reduce this arcing a ____________ is used.
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On negative ground systems, the negative terminal on the coil is connected to the:
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When testing ignition coil resistance, a high resistance value for a good coil would be found on the:
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Cam angle (dwell) refers to the length of time in degrees that the:
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The combustion power that opposes the upward travel of the piston resulting in a knocking or pinging sound is often caused by:
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The term "heat range" refers to the spark plug''s ability to transfer the heat at the firing tip to the cooling system of the engine. The heat range of a spark plug is determined by:
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The distributor rotor directs the high voltage from the coil to the:
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The mechanism located in the distributor that is used to alter ignition timing as engine speed changes is known as:
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On electronic ignition systems the reluctor, pick-up sensor and ignition control unit replace the ____________ and ____________.
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The advantage(s) of electronic ignition systems is (are):
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Upon inspection, a technician finds a spark plug that is sooty, black in color with signs of normal wear. This would be an indication of:
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Upon inspection a technician finds a spark plug that is tan or light brown in color with signs of center electrode wear and increased gap. This would be an indication of:
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Upon inspection a technician finds a spark plug that has a dished ground tang but little electrode wear. This would be an indication of:
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Technician A says that when a ballast resistor is used in the primary circuit it will heat up at slow engine speeds and reduce the current flow. Technician B says that the ballast resistor will cool down at high engine speeds and increase current flow. Who is correct?
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Wrong!
The voltage level required by the secondary circuit to fire the spark plug may be determined by:
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If the time required to reach the full force of combination after the spark occurs is .003 of a second, as the engine RPM increases, the spark must be:
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The reluctor assists in generating an electrical current in an electronic ignition system that triggers the _____________ to interrupt the circuit of the primary coil.
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Ignition coils create high secondary voltage through self-induction.
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The bypass circuit in an ignition system reduces supply voltage to the coil when in the start position for better starting.
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To set initial timing on a distributor type ignition, turning the distributor housing opposite rotor rotation would __________ engine timing.
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The ignition coil is part of both primary and secondary circuits.
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The pick-up coil in a distributor:
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High secondary voltage is produced when:
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An ignition system that is sensitive to moisture could be caused by all of the following EXCEPT:
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If certain spark plugs fire regularly and others do not and the secondary circuit is suspected to be the cause, which of the following could be the cause?
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A worn rubbing block on a set of points will cause the points to:
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To adjust the dwell on an electronic ignition system you would:
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One of these statements is incorrect. Select the one incorrect answer.
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A spark plug insulator is ribbed to aid in:
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The primary function of the inertia switch is to control power to the _____________ in the event of an accident.
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Which of the following symptoms may indicate a faulty ignition coil?
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Dual point ignition systems are used to:
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If point dwell is reduced, the coil voltage build up time would:
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You cannot troubleshoot point type ignition systems without the use of a scope.
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Which of the following would LEAST likely cause an engine misfire?
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What should the mechanical advance unit be inspected for?
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While measuring the resistance of a spark plug wire, a reading of 10,000 ohms is obtained. What does this indicate to the technician?
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Ignition Systems
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