semplr.

Exams · Certifications · Licensing

ASE Automobile & Light Truck (A1–A8) — Practice Exam

A8 Ignition: practice questions

Our ASE A1–A8 bank has 8 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

Start the free mock exam

Question 1 · A8 Engine Performance

What does the crankshaft position sensor provide to the PCM?

  1. Coolant temperature
  2. Throttle position and engine load
  3. Airflow
  4. Engine speed and crankshaft position
Show the answer

D. Engine speed and crankshaft position — Without it most engines won't start.

Question 2 · A8 Engine Performance

What does a camshaft position sensor allow on a sequential injection engine?

  1. Adjusting oil pressure
  2. Measuring valve lift
  3. Measuring engine speed alone when the crankshaft sensor fails
  4. Identifying cylinder 1 for injector and coil timing
Show the answer

D. Identifying cylinder 1 for injector and coil timing — Variable valve timing systems also use it.

Question 3 · A8 Engine Performance

What does a spark tester check?

  1. Spark plug gap
  2. Ignition timing advance at idle and at higher engine speeds
  3. Coil resistance only
  4. Whether the ignition system can produce a strong spark
Show the answer

D. Whether the ignition system can produce a strong spark — Use a tester with the correct gap rather than grounding a plug.

Question 4 · A8 Engine Performance

A coil-on-plug boot is cracked and carbon-tracked. What symptom is likely?

  1. Higher fuel economy
  2. Low oil pressure warnings at idle
  3. A misfire, especially under load or in damp weather
  4. A hard brake pedal
Show the answer

C. A misfire, especially under load or in damp weather — Spark leaks to ground instead of jumping the gap.

Question 5 · A8 Engine Performance

Why should spark plugs be installed to the specified torque?

  1. It isn't important
  2. Under-torqued plugs overheat, and over-torqued plugs can damage threads
  3. Torque sets the electrode gap by compressing the gasket and shell
  4. It changes the heat range
Show the answer

B. Under-torqued plugs overheat, and over-torqued plugs can damage threads — Some aluminum heads are especially sensitive.

More ASE A1–A8 topics