ASE certification study guide questions and answers
2026\2027 A+ Grade
Spark plugs are being replaced on a v6 engine. Which of the following should be performed before
removing the boot?
- correct answer Twist the boot 1/2 a turn
Technician A days that a positive crankcase ventilation (pvc) system reduces vehicle emissions. Tech B
says that a pvc system helps increase crankcase pressure. Who is correct?
- correct answer Tech A
Tech A says that secondary ignition wires should be inspected when replacing spark plugs. Tech B says
that if a new spark plug is dropped it can be used as long as the gap doesn't change. Who is correct?
- correct answer Tech A
Incorrect valve timing could be caused by...
- correct answer Incorrect timing belt position
When measuring parallelism of a disc brake rotor, A technician measures 0.002" variation beyond the
specification. The next step is to?
- correct answer Determine the minimum rotor machine to thickness
Tech A says that disconnecting the negative battery cable may be required to disable the air bag system.
Tech B says that a self powered test light can be used to test air bag system components. Who is
correct?
- correct answer Tech A only
A vehicles battery prematurely fails. A charging system output test shows the alternator is producing a
constant 16.0 volts. This could indicate a failed...
- correct answer Voltage regulator
2026\2027 A+ Grade
Spark plugs are being replaced on a v6 engine. Which of the following should be performed before
removing the boot?
- correct answer Twist the boot 1/2 a turn
Technician A days that a positive crankcase ventilation (pvc) system reduces vehicle emissions. Tech B
says that a pvc system helps increase crankcase pressure. Who is correct?
- correct answer Tech A
Tech A says that secondary ignition wires should be inspected when replacing spark plugs. Tech B says
that if a new spark plug is dropped it can be used as long as the gap doesn't change. Who is correct?
- correct answer Tech A
Incorrect valve timing could be caused by...
- correct answer Incorrect timing belt position
When measuring parallelism of a disc brake rotor, A technician measures 0.002" variation beyond the
specification. The next step is to?
- correct answer Determine the minimum rotor machine to thickness
Tech A says that disconnecting the negative battery cable may be required to disable the air bag system.
Tech B says that a self powered test light can be used to test air bag system components. Who is
correct?
- correct answer Tech A only
A vehicles battery prematurely fails. A charging system output test shows the alternator is producing a
constant 16.0 volts. This could indicate a failed...
- correct answer Voltage regulator
