ASE A6 Electrical/Electronic Systems
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
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1. A technician measures 12.6 volts across a fully charged battery with
the engine off. Which conclusion is MOST appropriate based solely on
this measurement?
A. The battery is definitely capable of delivering rated cranking current
B. The alternator is producing excessive voltage
C. The battery has an adequate open-circuit voltage, but a load test may
still be needed to determine its condition
D. The starter motor must be defective
A battery can show normal open-circuit voltage while having insufficient
capacity or excessive internal resistance. A load test or appropriate
,conductance test is needed to evaluate its ability to deliver current under
load.
2. During a starter circuit voltage-drop test, the technician measures 0.9
volt between the battery positive terminal and the starter motor
positive terminal while cranking. What does this measurement
indicate?
A. Normal resistance in the starter circuit
B. Excessive resistance in the positive side of the starter circuit
C. An open starter relay coil
D. A discharged battery only
Voltage drop measures unwanted voltage loss caused by resistance in a
circuit. A 0.9-volt drop on the positive side of a typical starter circuit is
excessive and indicates resistance in cables, terminals, connections, or
switching components.
3. Which condition is MOST likely to cause a slow-cranking starter while
the battery passes a proper load test?
A. High alternator output
B. An open headlamp filament
C. A shorted oxygen sensor
D. Excessive resistance in the starter cables or connections
,If the battery can supply the required current but the starter cranks slowly,
excessive resistance in the high-current starter circuit is a likely cause.
Corroded terminals and loose or damaged cables are common sources.
4. A starter motor clicks once when the ignition switch is turned to
START, but the engine does not crank. Battery voltage remains normal.
Which test should be performed FIRST?
A. Check oxygen sensor resistance
B. Replace the alternator
C. Test voltage at the starter solenoid during the START command
D. Check headlamp aim
Testing for the proper voltage at the starter solenoid determines whether
the control circuit is commanding the starter correctly. If the required
voltage is present, further testing can focus on the solenoid, starter motor,
cables, or mechanical condition.
5. What is the primary function of the starter solenoid in a conventional
starting system?
A. Regulate alternator voltage
B. Control fuel injector timing
C. Connect high current to the starter motor and engage the starter drive
D. Reduce battery voltage to the ignition coil
, The starter solenoid acts as a high-current switch and, on many
conventional starters, mechanically moves the starter drive into
engagement with the engine flywheel or flexplate.
6. A technician finds that a starter motor continues running after the
ignition key is released. Which condition could cause this symptom?
A. Open alternator field circuit
B. Sticking starter solenoid contacts
C. Weak headlamp relay
D. High tire pressure
If the starter remains energized after the START command is removed,
welded or sticking solenoid contacts, a mechanically stuck solenoid, or a
control-circuit fault can keep the starter engaged.
7. What is the primary purpose of an alternator in a modern vehicle?
A. Supply power only while the engine is cranking
B. Convert DC battery voltage directly into AC vehicle voltage
C. Generate electrical power and maintain battery state of charge while
the engine operates
D. Control the starter pinion
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2027 Q&A | Instant
Download Pdf
1. A technician measures 12.6 volts across a fully charged battery with
the engine off. Which conclusion is MOST appropriate based solely on
this measurement?
A. The battery is definitely capable of delivering rated cranking current
B. The alternator is producing excessive voltage
C. The battery has an adequate open-circuit voltage, but a load test may
still be needed to determine its condition
D. The starter motor must be defective
A battery can show normal open-circuit voltage while having insufficient
capacity or excessive internal resistance. A load test or appropriate
,conductance test is needed to evaluate its ability to deliver current under
load.
2. During a starter circuit voltage-drop test, the technician measures 0.9
volt between the battery positive terminal and the starter motor
positive terminal while cranking. What does this measurement
indicate?
A. Normal resistance in the starter circuit
B. Excessive resistance in the positive side of the starter circuit
C. An open starter relay coil
D. A discharged battery only
Voltage drop measures unwanted voltage loss caused by resistance in a
circuit. A 0.9-volt drop on the positive side of a typical starter circuit is
excessive and indicates resistance in cables, terminals, connections, or
switching components.
3. Which condition is MOST likely to cause a slow-cranking starter while
the battery passes a proper load test?
A. High alternator output
B. An open headlamp filament
C. A shorted oxygen sensor
D. Excessive resistance in the starter cables or connections
,If the battery can supply the required current but the starter cranks slowly,
excessive resistance in the high-current starter circuit is a likely cause.
Corroded terminals and loose or damaged cables are common sources.
4. A starter motor clicks once when the ignition switch is turned to
START, but the engine does not crank. Battery voltage remains normal.
Which test should be performed FIRST?
A. Check oxygen sensor resistance
B. Replace the alternator
C. Test voltage at the starter solenoid during the START command
D. Check headlamp aim
Testing for the proper voltage at the starter solenoid determines whether
the control circuit is commanding the starter correctly. If the required
voltage is present, further testing can focus on the solenoid, starter motor,
cables, or mechanical condition.
5. What is the primary function of the starter solenoid in a conventional
starting system?
A. Regulate alternator voltage
B. Control fuel injector timing
C. Connect high current to the starter motor and engage the starter drive
D. Reduce battery voltage to the ignition coil
, The starter solenoid acts as a high-current switch and, on many
conventional starters, mechanically moves the starter drive into
engagement with the engine flywheel or flexplate.
6. A technician finds that a starter motor continues running after the
ignition key is released. Which condition could cause this symptom?
A. Open alternator field circuit
B. Sticking starter solenoid contacts
C. Weak headlamp relay
D. High tire pressure
If the starter remains energized after the START command is removed,
welded or sticking solenoid contacts, a mechanically stuck solenoid, or a
control-circuit fault can keep the starter engaged.
7. What is the primary purpose of an alternator in a modern vehicle?
A. Supply power only while the engine is cranking
B. Convert DC battery voltage directly into AC vehicle voltage
C. Generate electrical power and maintain battery state of charge while
the engine operates
D. Control the starter pinion
