Engine Performance Test 5 Exam
Questions & Answers (Grade A+)
A says iridium plugs should not have their gap checked by the
technician
B says platinum spark plugs should not have their electrode filed -
correct answer ✅Both
A says ignition timing must retard as rpm increases
B says ignition timing is retarded under maximum load -
correct answer ✅Tech B
Compression since ignition allows for the elimination of the:
Crankshaft sensor
Camshaft sensor
Spark plug
Knock sensor -
correct answer ✅Camshaft sensor
Oscilloscope tests show firing lines the same but abnormally high,
this is a result of:
Rich air/fuel mixture
Low cylinder compression
Lean air/fuel mixture
, Engine Performance Test 5 Exam
Questions & Answers (Grade A+)
The spark plug air gap being too close -
correct answer ✅Lean air/fuel mixture
The firing voltages of a four cylinder engine are as follows:
#1: 8kV; #2: 27kV; #3: 4kV; and #4: 9kV. Which of the following is
true?
Cylinder 2 may have an open plug wire
Cylinder 3 may have an open plug wire
Cylinder 2 may have an oil-fouled spark plug
Cylinder 4 may have an oil-fouled spark plug -
correct answer ✅Cylinder 2 may have an open plug wire
A says coil assembly may be defective
B says voltage supply wire to the coil assembly may be open -
correct answer ✅Both
Ignition switch, primary circuit ignition circuit coil, primary winding,
and module are all components of:
Distributor
Secondary circuit
Hall effect
Questions & Answers (Grade A+)
A says iridium plugs should not have their gap checked by the
technician
B says platinum spark plugs should not have their electrode filed -
correct answer ✅Both
A says ignition timing must retard as rpm increases
B says ignition timing is retarded under maximum load -
correct answer ✅Tech B
Compression since ignition allows for the elimination of the:
Crankshaft sensor
Camshaft sensor
Spark plug
Knock sensor -
correct answer ✅Camshaft sensor
Oscilloscope tests show firing lines the same but abnormally high,
this is a result of:
Rich air/fuel mixture
Low cylinder compression
Lean air/fuel mixture
, Engine Performance Test 5 Exam
Questions & Answers (Grade A+)
The spark plug air gap being too close -
correct answer ✅Lean air/fuel mixture
The firing voltages of a four cylinder engine are as follows:
#1: 8kV; #2: 27kV; #3: 4kV; and #4: 9kV. Which of the following is
true?
Cylinder 2 may have an open plug wire
Cylinder 3 may have an open plug wire
Cylinder 2 may have an oil-fouled spark plug
Cylinder 4 may have an oil-fouled spark plug -
correct answer ✅Cylinder 2 may have an open plug wire
A says coil assembly may be defective
B says voltage supply wire to the coil assembly may be open -
correct answer ✅Both
Ignition switch, primary circuit ignition circuit coil, primary winding,
and module are all components of:
Distributor
Secondary circuit
Hall effect
