AUTOMOTIVE SERVICE EXCELLENCE ACTUAL
EXAM PAPER 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ The three major pollutants in automobile exhaust are. Answer:
Carbon monoxide, oxides of nitrogen, hydrocarbons
◉ Fuel evaporation accounts for what percentage of total HC
emissions?. Answer: 20 percent
◉ Particulate matter is. Answer: Microscopic particles suspended in
the atmosphere.
◉ Carbon monoxide is a result of. Answer: Incomplete combustion.
◉ Sulfur oxides are harmful because they. Answer: Combine with
water to form sulfuric acid.
◉ Ozone is created by a combination of sunlight, still air, and.
Answer: High levels of CO and NOx
◉ A temperature inversion increases air pollution by. Answer:
Forming a " lid " over stagnant air
,◉ U.S federal emission limits are established by the. Answer:
Enviromental Protection Agency
◉ Corporate Average Fuel Economy (CAFE) standards were rolled
back in the. Answer: 1990s
◉ Sulfur by-products of combustion can combine with water to
form. Answer: Sulfuric acid
◉ The only major type of pollutant that comes from a vehicle source
other than the exhaust is. Answer: CO
◉ OBD-1 seeks to decrease levels of automobile emission by.
Answer: Alerting the driver to a potential problem and monitoring
the efficiency with which certain systems are operating.
◉ An automotive internal combustion engine. Answer: has pistons
that are driven downward by explosions in the combustion chamber
◉ A spark plug fires near the end of the. Answer: Power stroke
◉ The camshaft rotates at. Answer: Half the speed of the crankshaft
, ◉ The bore is the diameter of the. Answer: Cylinder
◉ The four-stroke cycle operates in what order?. Answer: Intake,
compression, power, exhaust
◉ Diesel engines. Answer: Produce ignition by heat of compression
◉ How many strokes of a piston are required to turn the crankshaft
through 360 degrees?. Answer: Two
◉ A "retarded spark" is one that occurs. Answer: After top dead
center
◉ An internal combustion engine is an efficient use of available
energy because. Answer: The combustion of the fuel produces more
energy than is required to compress and fire it
◉ The typical ignition interval of an inline 6-cylinder engine is.
Answer: 720 degrees / 6 = 120 degrees
◉ How many sparks (spark plug firings) per crankshaft revolutions
are required by a typical 8-cylinder engine?. Answer: 4
EXAM PAPER 2026 QUESTIONS WITH
SOLUTIONS GRADED A+
◉ The three major pollutants in automobile exhaust are. Answer:
Carbon monoxide, oxides of nitrogen, hydrocarbons
◉ Fuel evaporation accounts for what percentage of total HC
emissions?. Answer: 20 percent
◉ Particulate matter is. Answer: Microscopic particles suspended in
the atmosphere.
◉ Carbon monoxide is a result of. Answer: Incomplete combustion.
◉ Sulfur oxides are harmful because they. Answer: Combine with
water to form sulfuric acid.
◉ Ozone is created by a combination of sunlight, still air, and.
Answer: High levels of CO and NOx
◉ A temperature inversion increases air pollution by. Answer:
Forming a " lid " over stagnant air
,◉ U.S federal emission limits are established by the. Answer:
Enviromental Protection Agency
◉ Corporate Average Fuel Economy (CAFE) standards were rolled
back in the. Answer: 1990s
◉ Sulfur by-products of combustion can combine with water to
form. Answer: Sulfuric acid
◉ The only major type of pollutant that comes from a vehicle source
other than the exhaust is. Answer: CO
◉ OBD-1 seeks to decrease levels of automobile emission by.
Answer: Alerting the driver to a potential problem and monitoring
the efficiency with which certain systems are operating.
◉ An automotive internal combustion engine. Answer: has pistons
that are driven downward by explosions in the combustion chamber
◉ A spark plug fires near the end of the. Answer: Power stroke
◉ The camshaft rotates at. Answer: Half the speed of the crankshaft
, ◉ The bore is the diameter of the. Answer: Cylinder
◉ The four-stroke cycle operates in what order?. Answer: Intake,
compression, power, exhaust
◉ Diesel engines. Answer: Produce ignition by heat of compression
◉ How many strokes of a piston are required to turn the crankshaft
through 360 degrees?. Answer: Two
◉ A "retarded spark" is one that occurs. Answer: After top dead
center
◉ An internal combustion engine is an efficient use of available
energy because. Answer: The combustion of the fuel produces more
energy than is required to compress and fire it
◉ The typical ignition interval of an inline 6-cylinder engine is.
Answer: 720 degrees / 6 = 120 degrees
◉ How many sparks (spark plug firings) per crankshaft revolutions
are required by a typical 8-cylinder engine?. Answer: 4
