AUTO TECH 1 STUDY GUIDE EXAM 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔engine - ✔✔provides the energy to move the vehicle and operate other vehicle
systems
✔✔fuel system - ✔✔must introduce the correct amount of fuel into the cylinders for
efficient combustion inside the engine
✔✔air fuel ratio - ✔✔(% of air/fuel) fuel system must alter with it and it changes in
engine operating conditions (temp., altitude, speed, load)
✔✔direct gasoline injection system - ✔✔spray gasoline right into the combustion
chambers above the pistons
✔✔ignition system - ✔✔needed on gasoline engines to ignite the air fuel mixture
(produces high voltage that jumps air gap at spark plug tip)
✔✔starting system - ✔✔has powerful electric starting motor which rotates the engine's
crankshaft until the engine "fires" and runs on its own power
-battery provides electricity for it
✔✔charging system - ✔✔needed to replace electrical energy drawn from the battery
(charges the battery)
-voltage regulator, usually built on alternator controls the voltage and current output of
the alt.
-voltage/battery= 12.6 volts
✔✔cooling system - ✔✔maintains a constant engine operating temperature (180-210
degrees)
-water pump forces coolant through inside of engine, hoses, radiator
✔✔lubrication system - ✔✔reduces friction and wear between internal engines
-cools energy by carrying heat away
-cleans/filtered oil to high friction points in an engine like the bearings, camshaft,
crankshaft & pistons
✔✔exhaust system - ✔✔quiets the noise produced during engine operation and routes
engine exhaust gases to the rear of the vehicle body
✔✔emission control system - ✔✔used to reduce the amount of toxic susbtances
produced by and engine and fuel system
✔✔drive train - ✔✔transfer turning force from the engine crankshaft to the drive wheels
AND SOLUTIONS RATED A+
✔✔engine - ✔✔provides the energy to move the vehicle and operate other vehicle
systems
✔✔fuel system - ✔✔must introduce the correct amount of fuel into the cylinders for
efficient combustion inside the engine
✔✔air fuel ratio - ✔✔(% of air/fuel) fuel system must alter with it and it changes in
engine operating conditions (temp., altitude, speed, load)
✔✔direct gasoline injection system - ✔✔spray gasoline right into the combustion
chambers above the pistons
✔✔ignition system - ✔✔needed on gasoline engines to ignite the air fuel mixture
(produces high voltage that jumps air gap at spark plug tip)
✔✔starting system - ✔✔has powerful electric starting motor which rotates the engine's
crankshaft until the engine "fires" and runs on its own power
-battery provides electricity for it
✔✔charging system - ✔✔needed to replace electrical energy drawn from the battery
(charges the battery)
-voltage regulator, usually built on alternator controls the voltage and current output of
the alt.
-voltage/battery= 12.6 volts
✔✔cooling system - ✔✔maintains a constant engine operating temperature (180-210
degrees)
-water pump forces coolant through inside of engine, hoses, radiator
✔✔lubrication system - ✔✔reduces friction and wear between internal engines
-cools energy by carrying heat away
-cleans/filtered oil to high friction points in an engine like the bearings, camshaft,
crankshaft & pistons
✔✔exhaust system - ✔✔quiets the noise produced during engine operation and routes
engine exhaust gases to the rear of the vehicle body
✔✔emission control system - ✔✔used to reduce the amount of toxic susbtances
produced by and engine and fuel system
✔✔drive train - ✔✔transfer turning force from the engine crankshaft to the drive wheels
