ASE A1 Practice Test - General Engine Diagnosis

Student Name

Using a diagnostic strategy for engine repair, which of the following is generally the last step in that process?

• Checking vehicle history
• Verifying the repair
• Doing service checks
• Verifying the concern

What is the tool shown used for?

• Checking oil pressure
• Checking exhaust back pressure
• Checking cylinder leakage
• Checking cylinder compression

An engine noise sounds like a knock at the side of the engine that is louder when the engine is cold and goes away or is reduced when the engine reaches operating temperature. Which of the following is the MOST likely cause?

• Cam bearing
• . Main bearing
• Wrist pin
• Piston slap

Engine mechanical testing should start with:

• Scan tool analysis
• Visual inspection
• Checking for any TSBs
• Checking for DTCs (diagnostic trouble codes)

An orange colored liquid is found at the front of the engine. What is leaking?

• Engine oil
• Coolant
• Automatic Transmission Fluid
• Washer Fluid

An engine cranks but will not start. Which of the following should be checked first?

• Check for spark
• Check for fuel
• Check engine compression
• Check engine timing

7.A power balance test is being performed. Technician A says to note the engine RPM before and during the test for each cylinder. Technician B says to record the RPM drop for each cylinder. Who is right?

• A only
• B only
• C both a and b
• D neither a or b

An engine will not start. The technician uses a scan tool and finds the DTC (Diagnostic Trouble Code) P0335 (CKP Crankshaft Position Sensor) stored. This vehicle is using a COP (coil-on-plug) ignition system. Which of the following is the MOST likely cause?

• Bad CKP (Crankshaft Position) Sensor ground
• Defective CMP (Cam Position) Sensor
• Open power circuit to Ignition Coil number 1
• Abnormal scope pattern

This question contains the word EXCEPT. Read the question carefully before choosing your answer. All of the following are reasons why you must disable the fuel injection system and ignition system when conducting an engine compression test, EXCEPT:

• Prevents damage to the ignition system during the test
• Prevents fuel injection into the cylinders
• Prevents a shop engine fire
• Prevents inaccurate readings