smog check license exam Questions and
Answers (Latest Update 2025)
Air Injection System (AIS) - Correct Answers ✅pumps air
into the exhaust manifold to burn unburned fuels
(hydrocarbons & carbon monoxide) and helps to warm up the
catalytic converter.
ARB/CARB (California air resources board) - Correct
Answers ✅A government agency that oversees the air
quality and establishes the Rules and Regulations to
maintains healthy air quality. Typically referred to simply as
ARB.
ASM (Acceleration Stimulation Mode) - Correct Answers
✅The test type for vehicles operated on a dynamometer
which stimulates actual driving conditions. The vehicle is
tested at 15 mph with a 50% load and at 25 mph with a 15%
load on the engine.
Basic Area - Correct Answers ✅An area less polluted than
an enhanced area requiring only Two Speed Idle Smog testing
for Biennial, Change of Ownership, and initial registration in
California
BTDC (Before Top Dead Center) - Correct Answers ✅The
measurement, in degrees of rotation, before a piston reaches
the top of its compression stroke.
, smog check license exam Questions and
Answers (Latest Update 2025)
What is Carbon Monoxide (CO)? - Correct Answers
✅carbon monoxide is a colorless, orderless gas that is fatal
to many life forms in moderate concentrations. CO emissions
are often the byproduct of an overly rich mixture.
Unhealthy levels of CO emissions are result in... - Correct
Answers ✅A vehicle failing its smog check.
CO is measured in... - Correct Answers ✅percent
CAT (Catalytic Converter) - Correct Answers ✅Located
between the exhaust manifold and the muffler, this device
uses precious metals as a catalyst to turn hydrocarbons,
carbon monoxide, oxygen, and oxides of nitrogen into carbon
dioxide and water vapor.
CTS (Coolant Temperature Sensor) - Correct Answers ✅A
sensor used to measure the vehicle's engine coolant
temperature that sends the signal to the on-board computer
for processing
Cylinders - Correct Answers ✅The number of combustion
cylinders in the engine (typically 4, 6, or 8)
Dashpot - Correct Answers ✅A mechanical device that
slows the closing of the throttle plate.
Answers (Latest Update 2025)
Air Injection System (AIS) - Correct Answers ✅pumps air
into the exhaust manifold to burn unburned fuels
(hydrocarbons & carbon monoxide) and helps to warm up the
catalytic converter.
ARB/CARB (California air resources board) - Correct
Answers ✅A government agency that oversees the air
quality and establishes the Rules and Regulations to
maintains healthy air quality. Typically referred to simply as
ARB.
ASM (Acceleration Stimulation Mode) - Correct Answers
✅The test type for vehicles operated on a dynamometer
which stimulates actual driving conditions. The vehicle is
tested at 15 mph with a 50% load and at 25 mph with a 15%
load on the engine.
Basic Area - Correct Answers ✅An area less polluted than
an enhanced area requiring only Two Speed Idle Smog testing
for Biennial, Change of Ownership, and initial registration in
California
BTDC (Before Top Dead Center) - Correct Answers ✅The
measurement, in degrees of rotation, before a piston reaches
the top of its compression stroke.
, smog check license exam Questions and
Answers (Latest Update 2025)
What is Carbon Monoxide (CO)? - Correct Answers
✅carbon monoxide is a colorless, orderless gas that is fatal
to many life forms in moderate concentrations. CO emissions
are often the byproduct of an overly rich mixture.
Unhealthy levels of CO emissions are result in... - Correct
Answers ✅A vehicle failing its smog check.
CO is measured in... - Correct Answers ✅percent
CAT (Catalytic Converter) - Correct Answers ✅Located
between the exhaust manifold and the muffler, this device
uses precious metals as a catalyst to turn hydrocarbons,
carbon monoxide, oxygen, and oxides of nitrogen into carbon
dioxide and water vapor.
CTS (Coolant Temperature Sensor) - Correct Answers ✅A
sensor used to measure the vehicle's engine coolant
temperature that sends the signal to the on-board computer
for processing
Cylinders - Correct Answers ✅The number of combustion
cylinders in the engine (typically 4, 6, or 8)
Dashpot - Correct Answers ✅A mechanical device that
slows the closing of the throttle plate.
