ASE Practice Test (L1: Advanced Engine Performance Specialist)

Question 1

The EGR (Exhaust Gas Recirculation) valve may be closed, according to a technician. A closed EGR valve would be indicated by which of the following?

Accepted Answer

Spark knock

Answer

Engine surge

Answer

Rough idle

Answer

Stalling

Question 2

What is the LEAST likely reason of a gasoline tank leak:

Accepted Answer

defective tank straps.

Answer

defective seams.

Answer

corrosion.

Answer

road damage.

Question 3

Blue smoke comes from the exhaust pipe of a vehicle. Technician X says that blocked cylinder head oil return passages could be the cause. Technician Y says that a stuck-open engine thermostat could be the cause. Who is right?

Accepted Answer

X only

Answer

Both X and Y

Answer

Neither X nor Y

Answer

Y only

Question 4

What should you do first when diagnosing an engine performance problem?

Accepted Answer

Discuss the concern with the owner of the vehicle

Answer

Road test the vehicle

Answer

Check for the symptoms in the service manual

Answer

Retrieve any diagnostic trouble codes

Question 5

The plastic sensors on an electronically controlled EGR valve have melted. Technician X says excessive back pressure caused by a partially clogged exhaust system could be the cause. Technician Y says to always check for a restricted exhaust whenever replacing a failed EGR valve sensor. Who is right?

Accepted Answer

Both X and Y

Answer

Neither X nor Y

Answer

X only

Answer

Y only

Question 6

All of these reduce the life of the turbocharger, except:

Accepted Answer

exhaust system damage.

Answer

lack of air cleaner maintenance.

Answer

lack of oil changes.

Answer

inadequate cooling.

Question 7

A vehicle is being diagnosed for poor fuel economy. Engine tests show a rich exhaust gas mixture. Technician X says that a failed oxygen (O2 ) sensor could be the cause. Technician Y says that a failed engine coolant temperature sensor could be the cause. Who is right?

Accepted Answer

Both X and Y

Answer

Neither X nor Y

Answer

X only

Answer

Y only

Question 8

Technician X believes that paper service manuals still get used today. Technician Y believes that you should always follow recommended service procedures found in online service information. Who is correct?

Accepted Answer

Technician Y

Answer

Both technicians

Answer

Neither technician

Answer

Technician X

Question 9

A disconnected spark plug is interpreted by the vehicle's OBD II (On Board Diagnostic Level 2) system as a misfire that could harm the three-way catalyst. On which trip will the Malfunction Indicator Lamp (MIL) be most likely turned on by the ECM or PCM?

Accepted Answer

1st trip

Answer

2nd trip

Answer

4th trip

Answer

3rd trip

Question 10

The following below are true about the cylinder leakage test. Except:

Accepted Answer

a gauge reading of 100 percent indicates no cylinder leakage.

Answer

air loss from the exhaust indicates a valve problem.

Answer

a gauge reading of 0 percent indicates no cylinder leakage.

Answer

air loss from the PCV valve indicates worn piston rings.