Free CEI Testing Procedures & Equipment Operation Questions and Answers

Question 1

What is the first step before beginning an emissions inspection?

Accepted Answer

Verify the vehicle's identification information.

Answer

Connect the diagnostic equipment.

Answer

Check the tire pressure.

Answer

Begin tailpipe emissions sampling.

Question 2

Which tool is primarily used to read a vehicle’s onboard diagnostic trouble codes (DTCs)?

Accepted Answer

OBD-II scanner

Answer

Fuel pressure gauge

Answer

Infrared thermometer

Answer

Vacuum tester

Question 3

Why must an inspector check for visible smoke emissions before starting a test?

Accepted Answer

To check for obvious emission problems.

Answer

It is required for safety reasons.

Answer

To determine the fuel type.

Answer

To test the exhaust pipe’s temperature.

Question 4

What must you ensure when performing a tailpipe emissions test?

Accepted Answer

The tailpipe probe is securely and properly sealed in the exhaust outlet.

Answer

The vehicle’s headlights are turned off.

Answer

The fuel cap is loose.

Answer

The vehicle’s doors are open.

Question 5

What should you do if diagnostic equipment displays an error during testing?

Accepted Answer

Consult the equipment manual and address the error before proceeding.

Answer

Ignore the error and continue testing.

Answer

Turn off the vehicle immediately.

Answer

Ask the vehicle owner to fix it themselves.

Question 6

Which factor is critical when selecting the correct emissions testing procedure for a vehicle?

Accepted Answer

Vehicle’s model year and fuel type.

Answer

Vehicle’s license plate color.

Answer

The owner’s address.

Answer

The number of passengers.

Question 7

What is the function of a gas analyzer in emissions testing?

Accepted Answer

Measure concentrations of exhaust gases.

Answer

Measure coolant levels.

Answer

Check tire pressure.

Answer

Adjust vehicle alignment.

Question 8

Which of the following is a necessary step when preparing the emissions test equipment for use?

Accepted Answer

Calibrate the equipment according to manufacturer specifications.

Answer

Turn it on without calibration.

Answer

Connect it to the nearest vehicle immediately.

Answer

Record its serial number only.

Question 9

Why is it important to monitor environmental conditions during emissions testing?

Accepted Answer

To ensure consistent and accurate test results.

Answer

To keep the inspector comfortable.

Answer

To track the weather for the owner.

Answer

To determine the vehicle color’s appearance.