SMOG QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTION
(GRADED A+)
1. System Communication
Q: The EIS (Emission Inspection System) communicates information to
_______ using ________. A: The VID (Vehicle Information Database); the
internet.
Explanation: To perform a compliant Smog Check, your equipment must
have a stable, continuous internet connection. This link allows the EIS/OIS
to transmit test results to the state’s Vehicle Information Database (VID)
in real time and retrieve the correct test parameters for the specific vehicle
being inspected.
2. EGR Functional Test Requirements
Q: A Smog Inspection Technician must perform an EGR (Exhaust Gas
Recirculation) functional test on vehicles that are: A: 1976 – 1995 Vehicles
and Trucks.
Explanation: The manual functional test for the EGR valve is required for
vehicles in the 1976–1995 model year range that are subject to a Two-Speed
Idle (TSI) test.
Note: For vehicles 1996 and newer (OBDII equipped), the vehicle’s onboard
computer monitors the EGR system, so a manual functional test is not
required.
3. Visible Smoke Test Procedure
Q: How do you proceed when you observe smoke on the first snap of a
gasoline-fueled vehicle? A: Pass the vehicle; the 1st snap does not count.
Explanation: The official visible smoke test consists of three "snap"
throttles. The first snap is officially defined as a pre-conditioning or
stabilization snap; it is used to clear the engine and is not part of the pass/fail
, evaluation. You must continue the test and evaluate the vehicle during the
second and third snaps, as well as during the idle and crankcase (PCV)
observation periods.
1984 Dodge truck undergoing a Two-Speed Idle Test -ANSWER ✔✔. Which of
the following vehicles are subject to the EGR Functional Test (assuming the
vehicle is equipped with EGR)
Propane / Natural Gas -ANSWER ✔✔The Smog Check program applies to all
vehicles powered by:
Both -ANSWER ✔✔Technician A says "The EIS will not print out Smog
Certificates." Technician B says the vehicle inspection report can be used to show
that a smog inspection was done. Who is correct
PCV, catalytic converters -ANSWER ✔✔First emission control device
1995 -ANSWER ✔✔what year did they stop testing the EGR for proper operation?
Change of Ownership Area, Basic Area, Enhanced Area -ANSWER ✔✔What are
the smog program areas that CA is divide into
by air quality -ANSWER ✔✔how are the program areas divided
upon a change of ownership and initial registration in CA only -ANSWER
✔✔when do Vehicles require a smog inspection in the change of Ownership Area
WITH COMPLETE SOLUTION
(GRADED A+)
1. System Communication
Q: The EIS (Emission Inspection System) communicates information to
_______ using ________. A: The VID (Vehicle Information Database); the
internet.
Explanation: To perform a compliant Smog Check, your equipment must
have a stable, continuous internet connection. This link allows the EIS/OIS
to transmit test results to the state’s Vehicle Information Database (VID)
in real time and retrieve the correct test parameters for the specific vehicle
being inspected.
2. EGR Functional Test Requirements
Q: A Smog Inspection Technician must perform an EGR (Exhaust Gas
Recirculation) functional test on vehicles that are: A: 1976 – 1995 Vehicles
and Trucks.
Explanation: The manual functional test for the EGR valve is required for
vehicles in the 1976–1995 model year range that are subject to a Two-Speed
Idle (TSI) test.
Note: For vehicles 1996 and newer (OBDII equipped), the vehicle’s onboard
computer monitors the EGR system, so a manual functional test is not
required.
3. Visible Smoke Test Procedure
Q: How do you proceed when you observe smoke on the first snap of a
gasoline-fueled vehicle? A: Pass the vehicle; the 1st snap does not count.
Explanation: The official visible smoke test consists of three "snap"
throttles. The first snap is officially defined as a pre-conditioning or
stabilization snap; it is used to clear the engine and is not part of the pass/fail
, evaluation. You must continue the test and evaluate the vehicle during the
second and third snaps, as well as during the idle and crankcase (PCV)
observation periods.
1984 Dodge truck undergoing a Two-Speed Idle Test -ANSWER ✔✔. Which of
the following vehicles are subject to the EGR Functional Test (assuming the
vehicle is equipped with EGR)
Propane / Natural Gas -ANSWER ✔✔The Smog Check program applies to all
vehicles powered by:
Both -ANSWER ✔✔Technician A says "The EIS will not print out Smog
Certificates." Technician B says the vehicle inspection report can be used to show
that a smog inspection was done. Who is correct
PCV, catalytic converters -ANSWER ✔✔First emission control device
1995 -ANSWER ✔✔what year did they stop testing the EGR for proper operation?
Change of Ownership Area, Basic Area, Enhanced Area -ANSWER ✔✔What are
the smog program areas that CA is divide into
by air quality -ANSWER ✔✔how are the program areas divided
upon a change of ownership and initial registration in CA only -ANSWER
✔✔when do Vehicles require a smog inspection in the change of Ownership Area
