ASE F1 Alternate Fuels Certification Practice Test

Compressed Natural Gas Vehicle Test

Prepare for the ASE F1 Alternate Fuels Certification with our comprehensive practice test. This assessment is designed to evaluate your proficiency in diagnosing, servicing, and repairing compressed natural gas (CNG) vehicles.

 

Results

Passed.

Answers:

1. check with the system manufacturer for warranty

2. non-ammonia soap

3. A failure to open the manual lock-down valve(s)

4. Remove the cylinder from service

5. recurved timing

Did not pass, manual linked below. 😉

Answers:

1. check with the system manufacturer for warranty

2. non-ammonia soap

3. A failure to open the manual lock-down valve(s)

4. Remove the cylinder from service

5. recurved timing

#1. An EPA-certified CNG system has failed emissions due to a failure of a high cost system component. The best first step in repair should be to:

replace the part and charge the customer to ensure timely service

attempt to locate a substitute component from a different manufacturer

check with the system manufacturer for warranty

modify the system to eliminate the part

check with the system manufacturer for warranty is correct

#2. Which of these should be used to check the fuel line connections after a compressed natural gas conversion?

nitrogen

propane

non-ammonia soap

carbon dioxide

non-ammonia soap is correct

#3. After installing a new CNG fuel tank, the technician finds that the vehicle will not accept fuel. Which of these could be the cause?

A pinched O-ring on the receptacle line

A failure to open the manual lock-down valve(s)

An open circuit on the in-tank solenoid valve

A failure to open the manual lock-down valve(s) is correct

#4. A hoop-wrapped Type-2 cylinder shows evidence of stress corrosion cracking. What should the technician do?

Nothing, stress corrosion cracking is normal

Repair the area using an approved coating

Note the damage on the inspection form

Remove the cylinder from service

Remove the cylinder from service is correct

#5. A dedicated CNG vehicle has a no-start condition. All of these could be the cause EXCEPT:

no ignition source

recurved timing

no fuel pressure

recurved timing is correct

Previous

Finish

By completing these practice questions, you’ll enhance your understanding and readiness for the official ASE F1 examination.

Current tech’s have to retest every 5 years to keep their certification up to date, that official test is called the F1R.

Reference:

• ASE Training Resources
• Automotive Technology Programs
• A Quick Guide to Mechanic Certifications

This is not an official test. Use it for entertainment purposes only.