BAR Smog Check Gasoline Visible Smoke Test Training
– Questions With Complete Solutions
When was the Visible Smoke Test incorporated into the Smog Check program?
Right Ans - March 2008
When was the test revised to include the throttle snap sequence "BAR Snap
Test"? Right Ans - January 2010
To which cars does the BAR Snap Test apply? Right Ans - All model years &
GVWR of gasoline, CNG, LPG, and ethanol vehicles
CNG Right Ans - Compressed Natural Gas
LPG Right Ans - Liquid Petroleum Gas
LNG Right Ans - Liquid Natural Gas
How many parts are there to the Visible Smoke Test? Right Ans - 1)
Crankcase Test
2) Idle Test
3) BAR Snap Test
What is the Crankcase Test (Part 1 Visible Smoke Test)? Right Ans - Check
for smoke from the crankcase by observing the engine crankcase system for
10 seconds while idling
What is the Idle Test (Part II Visible Smoke Test)? Right Ans - Check for
smoke from the tailpipe at idle
What is the BAR Snap Test (Part III Visible Smoke Test)? Right Ans - Check
for smoke from the tailpipe during BAR Snap Test.
There are 3 BAR snaps that must be performed.
1) BAR Snap before TSI or ASM to become familiar with throttle (do not check
for smoke)
2 & 3) BAR Snap during "Other Emissions related"
– Questions With Complete Solutions
When was the Visible Smoke Test incorporated into the Smog Check program?
Right Ans - March 2008
When was the test revised to include the throttle snap sequence "BAR Snap
Test"? Right Ans - January 2010
To which cars does the BAR Snap Test apply? Right Ans - All model years &
GVWR of gasoline, CNG, LPG, and ethanol vehicles
CNG Right Ans - Compressed Natural Gas
LPG Right Ans - Liquid Petroleum Gas
LNG Right Ans - Liquid Natural Gas
How many parts are there to the Visible Smoke Test? Right Ans - 1)
Crankcase Test
2) Idle Test
3) BAR Snap Test
What is the Crankcase Test (Part 1 Visible Smoke Test)? Right Ans - Check
for smoke from the crankcase by observing the engine crankcase system for
10 seconds while idling
What is the Idle Test (Part II Visible Smoke Test)? Right Ans - Check for
smoke from the tailpipe at idle
What is the BAR Snap Test (Part III Visible Smoke Test)? Right Ans - Check
for smoke from the tailpipe during BAR Snap Test.
There are 3 BAR snaps that must be performed.
1) BAR Snap before TSI or ASM to become familiar with throttle (do not check
for smoke)
2 & 3) BAR Snap during "Other Emissions related"
