Ignition System questions with correct
answers rated A+
Technician A says the secondary ignition system is designed to handle high voltages up in the
thousands of volts scale. Technician B says low secondary system voltage output could be the
result of high primary ignition circuit resistance. Who is correct?
- A only
- B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Both A and B
While testing a spark plug wire as shown in the figure, Technician A says the plug wire resistance
should not exceed 10 meg ohms of resistance. Technician B says plug wire resistance readings
should indicate no (zero) resistance. Who is correct?
- A only
- B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Neither A nor B
When testing a pickup coil with an ohmmeter, as shown in the figure, Technician A says when
the pickup coil leads are moved, an erratic ohmmeter reading is normal. Technician B says that
an infinite ohmmeter reading between the pickup coil terminals is an acceptable reading. Who
is correct?
- A only
, - B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Neither A nor B
While monitoring secondary ignition with an oscilloscope, as shown in the figure, the LEAST
LIKELY cause of high resistance in the ignition secondary circuit is:
- damaged spark plug wires
- no dielectric compound on the ignition module mounting surface
- corroded spark plug wire ends
- excessive spark plug air gap - correct answer ✔✔ no dielectric compound on the ignition
module mounting surface
All of the following are true when testing a pickup coil EXCEPT:
- each pickup coil should be within the manufacturer's specified resistance value
- a resistance reading below manufacturer's specification indicates an open pickup coil
- a resistance reading above manufacturer's specification indicates an open pickup coil
- an erratic reading while wiggling the pickup coil wires indicates that the pickup coil is
intermittent - correct answer ✔✔ a resistance reading below manufacturer's specification
indicates an open pickup coil
The LEAST LIKELY cause of ignition coil failure is:
- prolonged open circuit in the secondary
- overheating the coil
- coil case cracking
answers rated A+
Technician A says the secondary ignition system is designed to handle high voltages up in the
thousands of volts scale. Technician B says low secondary system voltage output could be the
result of high primary ignition circuit resistance. Who is correct?
- A only
- B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Both A and B
While testing a spark plug wire as shown in the figure, Technician A says the plug wire resistance
should not exceed 10 meg ohms of resistance. Technician B says plug wire resistance readings
should indicate no (zero) resistance. Who is correct?
- A only
- B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Neither A nor B
When testing a pickup coil with an ohmmeter, as shown in the figure, Technician A says when
the pickup coil leads are moved, an erratic ohmmeter reading is normal. Technician B says that
an infinite ohmmeter reading between the pickup coil terminals is an acceptable reading. Who
is correct?
- A only
, - B only
- Both A and B
- Neither A nor B - correct answer ✔✔ Neither A nor B
While monitoring secondary ignition with an oscilloscope, as shown in the figure, the LEAST
LIKELY cause of high resistance in the ignition secondary circuit is:
- damaged spark plug wires
- no dielectric compound on the ignition module mounting surface
- corroded spark plug wire ends
- excessive spark plug air gap - correct answer ✔✔ no dielectric compound on the ignition
module mounting surface
All of the following are true when testing a pickup coil EXCEPT:
- each pickup coil should be within the manufacturer's specified resistance value
- a resistance reading below manufacturer's specification indicates an open pickup coil
- a resistance reading above manufacturer's specification indicates an open pickup coil
- an erratic reading while wiggling the pickup coil wires indicates that the pickup coil is
intermittent - correct answer ✔✔ a resistance reading below manufacturer's specification
indicates an open pickup coil
The LEAST LIKELY cause of ignition coil failure is:
- prolonged open circuit in the secondary
- overheating the coil
- coil case cracking
