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BMW MEMBER / ASE TECHNICIAN STUDY GUIDE 60 Sure
Practice Questions | Answers & Rationales
1. A vehicle’s battery reads 12.6 volts with the engine off. This
indicates:
A. Battery is discharged
B. Battery is fully charged
C. Battery is overcharged
D. Alternator is faulty
Answer: B
Rationale: A fully charged 12-volt battery should read
approximately 12.6 volts or higher with the engine off.
2. When testing a starting system, the voltage drop on the
positive battery cable should be less than:
A. 0.2 volts
B. 0.5 volts
C. 1.0 volt
D. 2.0 volts
Answer: B
Rationale: Excessive voltage drop (typically >0.5 volts per cable)
indicates resistance and poor current flow.
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3. A technician measures fuel pressure that drops immediately
after the pump shuts off. This most likely indicates:
A. A leaking injector or faulty check valve
B. A clogged fuel filter
C. A faulty oxygen sensor
D. A broken fuel gauge
Answer: A
Rationale: Rapid fuel pressure loss after shutdown often points
to a leaking injector or a faulty pump check valve.
4. Which sensor is primarily responsible for closed-loop fuel
control?
A. Mass air flow sensor
B. Oxygen sensor
C. Coolant temperature sensor
D. Knock sensor
Answer: B
Rationale: The oxygen sensor monitors exhaust oxygen and
allows the PCM to adjust fuel trim in closed loop.
5. A diagnostic trouble code P0300 indicates:
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A. Catalytic converter failure
B. Random/multiple cylinder misfire
C. EVAP system leak
D. Oxygen sensor heater failure
Answer: B
Rationale: P0300 is a generic OBD-II code for random/multiple
cylinder misfire.
6. A brake pedal that slowly sinks to the floor indicates:
A. Worn brake pads
B. A leak in the hydraulic system or faulty master cylinder
C. Warped rotors
D. Sticking caliper
Answer: B
Rationale: A spongy/sinking pedal is often caused by internal
master cylinder leakage or external hydraulic leak.
7. Which of the following is a symptom of a warped brake
rotor?
A. Brake squeal only
B. Steering wheel vibration during braking
C. Pulsing ABS pedal
D. Pulling to one side only
BMW MEMBER / ASE TECHNICIAN STUDY GUIDE 60 Sure
Practice Questions | Answers & Rationales
1. A vehicle’s battery reads 12.6 volts with the engine off. This
indicates:
A. Battery is discharged
B. Battery is fully charged
C. Battery is overcharged
D. Alternator is faulty
Answer: B
Rationale: A fully charged 12-volt battery should read
approximately 12.6 volts or higher with the engine off.
2. When testing a starting system, the voltage drop on the
positive battery cable should be less than:
A. 0.2 volts
B. 0.5 volts
C. 1.0 volt
D. 2.0 volts
Answer: B
Rationale: Excessive voltage drop (typically >0.5 volts per cable)
indicates resistance and poor current flow.
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3. A technician measures fuel pressure that drops immediately
after the pump shuts off. This most likely indicates:
A. A leaking injector or faulty check valve
B. A clogged fuel filter
C. A faulty oxygen sensor
D. A broken fuel gauge
Answer: A
Rationale: Rapid fuel pressure loss after shutdown often points
to a leaking injector or a faulty pump check valve.
4. Which sensor is primarily responsible for closed-loop fuel
control?
A. Mass air flow sensor
B. Oxygen sensor
C. Coolant temperature sensor
D. Knock sensor
Answer: B
Rationale: The oxygen sensor monitors exhaust oxygen and
allows the PCM to adjust fuel trim in closed loop.
5. A diagnostic trouble code P0300 indicates:
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A. Catalytic converter failure
B. Random/multiple cylinder misfire
C. EVAP system leak
D. Oxygen sensor heater failure
Answer: B
Rationale: P0300 is a generic OBD-II code for random/multiple
cylinder misfire.
6. A brake pedal that slowly sinks to the floor indicates:
A. Worn brake pads
B. A leak in the hydraulic system or faulty master cylinder
C. Warped rotors
D. Sticking caliper
Answer: B
Rationale: A spongy/sinking pedal is often caused by internal
master cylinder leakage or external hydraulic leak.
7. Which of the following is a symptom of a warped brake
rotor?
A. Brake squeal only
B. Steering wheel vibration during braking
C. Pulsing ABS pedal
D. Pulling to one side only
