The primary circuit in an ignition system is considered to be:
The secondary circuit in an ignition system is considered to be:
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?
Arcing of the ignition points is caused by a spike of induced voltage in the primary windings. To reduce this arcing a ____________ is used.
On negative ground systems, the negative terminal on the coil is connected to the:
When testing ignition coil resistance, a high resistance value for a good coil would be found on the:
Cam angle (dwell) refers to the length of time in degrees that the:
The combustion power that opposes the upward travel of the piston resulting in a knocking or pinging sound is often caused by:
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:
The distributor rotor directs the high voltage from the coil to the:
The mechanism located in the distributor that is used to alter ignition timing as engine speed changes is known as:
On electronic ignition systems the reluctor, pick-up sensor and ignition control unit replace the ____________ and ____________.
The advantage(s) of electronic ignition systems is (are):
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:
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:
Upon inspection a technician finds a spark plug that has a dished ground tang but little electrode wear. This would be an indication of:
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?
The voltage level required by the secondary circuit to fire the spark plug may be determined by:
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:
The reluctor assists in generating an electrical current in an electronic ignition system that triggers the _____________ to interrupt the circuit of the primary coil.
Ignition coils create high secondary voltage through self-induction.
The bypass circuit in an ignition system reduces supply voltage to the coil when in the start position for better starting.
To set initial timing on a distributor type ignition, turning the distributor housing opposite rotor rotation would __________ engine timing.
The ignition coil is part of both primary and secondary circuits.
The pick-up coil in a distributor:
High secondary voltage is produced when:
An ignition system that is sensitive to moisture could be caused by all of the following EXCEPT:
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?
A worn rubbing block on a set of points will cause the points to:
To adjust the dwell on an electronic ignition system you would:
One of these statements is incorrect. Select the one incorrect answer.
A spark plug insulator is ribbed to aid in:
The primary function of the inertia switch is to control power to the _____________ in the event of an accident.
Which of the following symptoms may indicate a faulty ignition coil?
Dual point ignition systems are used to:
If point dwell is reduced, the coil voltage build up time would:
You cannot troubleshoot point type ignition systems without the use of a scope.
Which of the following would LEAST likely cause an engine misfire?
What should the mechanical advance unit be inspected for?
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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