SMOG INSPECTOR STUDY GUIDE BAR
EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Handling Modified O₂ Sensor Wiring
During a visual inspection, the inspector notices the oxygen ($O_2$) sensor
wire has been extended. What is the correct procedure?
Mark as "Tampered." Emission-related components must be verified to be
present, correctly connected, and free from unauthorized modifications. An
extended wire is considered a modification that interferes with the integrity
of the emission control system. You must enter "tamper" for the $O_2$
sensor in the inspection system.
Handling Modified PCV Hoses
During a visual inspection, the inspector notices the Positive Crankcase
Ventilation (PCV) hose has been extended or modified. What is the correct
procedure?
Mark as "Tampered" or "Fail." All emission control system hoses,
including PCV hoses, must be properly routed, connected, and completely
free of unauthorized modifications or extensions. If a hose is modified to
bypass original specifications, it does not meet the requirements for a
passing inspection.
The technician must enter “tamper” for the PCV system during the visual
inspection.
, During smog check inspection the inspector noticed the pcv hose was replaced
with a fuel hose. What should the technician do next?
The PCV system (Positive Crankcase Ventilation) must have the correct type of
hose:
It needs to be oil-resistant and designed for crankcase vapors
The technician must enter “tamper” for the PCV system during the visual
inspection.
Customer brings in a vehicle with wet tires for smog check inspection. What is the
proper drying methods?
Drive the vehicle on the BAR-97 dynamometer at approximately 25-30 mph until
the tires are dry.
During smog check inspection the technician noticed smoke coming out of the
hood caused by oil leak from the head gasket dripped down to the exhaust. What
should the inspector do next?
Stop the inspection immediately due to safety hazard.
During a smog check inspection the inspector smells fuel but there is no sign of
fuel leak. What should the inspector do next?
Do not continue blindly — first, investigate the smell:
EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS 100%
CORRECT RATED A+
Handling Modified O₂ Sensor Wiring
During a visual inspection, the inspector notices the oxygen ($O_2$) sensor
wire has been extended. What is the correct procedure?
Mark as "Tampered." Emission-related components must be verified to be
present, correctly connected, and free from unauthorized modifications. An
extended wire is considered a modification that interferes with the integrity
of the emission control system. You must enter "tamper" for the $O_2$
sensor in the inspection system.
Handling Modified PCV Hoses
During a visual inspection, the inspector notices the Positive Crankcase
Ventilation (PCV) hose has been extended or modified. What is the correct
procedure?
Mark as "Tampered" or "Fail." All emission control system hoses,
including PCV hoses, must be properly routed, connected, and completely
free of unauthorized modifications or extensions. If a hose is modified to
bypass original specifications, it does not meet the requirements for a
passing inspection.
The technician must enter “tamper” for the PCV system during the visual
inspection.
, During smog check inspection the inspector noticed the pcv hose was replaced
with a fuel hose. What should the technician do next?
The PCV system (Positive Crankcase Ventilation) must have the correct type of
hose:
It needs to be oil-resistant and designed for crankcase vapors
The technician must enter “tamper” for the PCV system during the visual
inspection.
Customer brings in a vehicle with wet tires for smog check inspection. What is the
proper drying methods?
Drive the vehicle on the BAR-97 dynamometer at approximately 25-30 mph until
the tires are dry.
During smog check inspection the technician noticed smoke coming out of the
hood caused by oil leak from the head gasket dripped down to the exhaust. What
should the inspector do next?
Stop the inspection immediately due to safety hazard.
During a smog check inspection the inspector smells fuel but there is no sign of
fuel leak. What should the inspector do next?
Do not continue blindly — first, investigate the smell:
