ASVAB 2024-2025 (Auto Information) Exam
Questions With Verified Answers
The high-voltage winding in a car's ignition system is called the _______ - answer✔secondary
coil winding
Why is a coolant recovery reservoir necessary? - answer✔to capture overflow when the
radiator pressure cap valve opens, because the flow of coolant between the engine and
radiator varies based on the heat of the engine.
The _______ is the main component of charging system and converts mechanical energy into
electrical energy. - answer✔alternator
The AC electricity produced by the alternator is converted to DC by the ______. -
answer✔rectifier (or rectifier bridge)
Define piston - answer✔a cylindrical object that moves up and down inside an engine's
cylinder.
what happens in an engine's oil pan? - answer✔oil drips from various engine parts into the pan,
cools, and is picked up by the oil tube and sent back to the oil pump.
______ send data to a car's computer; ______ receive commands from a car's computer. -
answer✔Sensors; actuators
what are the two major types of engine cooling systems? - answer✔air-cooling and water-
cooling
what does a crankshaft do? - answer✔converts the linear motion of the piston into rotary
motion.
_______ protect other car parts from the energy produced by the up-and-down movement of
the wheels. - answer✔shock absorbers
what are oil galleries? - answer✔passages throughout the engine that deliver oil to various
engine components.
in most cars, exhaust gases pass from the catalytic converter and through the ________ before
leaving the car. - answer✔muffler
what does a connecting rod do? - answer✔connect each piston to the engine's crankshaft.
OHV stands for _________. - answer✔overhead valve
does a car's battery provide AC or DC electricity? - answer✔DC
what are the ball joints? - answer✔ball-and-socket arrangements that allow the steering
knuckle to turn and move up and down.
what do piston rings do? - answer✔seal the cylinder so that exhaust gases do not leak out and
oil does not leak in.
what flows through radiator hoses? - answer✔coolant flowing from the radiator to the engine
and returning from the engine to the radiator.
________ can transmit power through very steep angles in order to transfer mechanical energy
to the car's wheels. - answer✔Constant velocity (CV) joints
define engine block. - answer✔A framework in which the cylinders are arranged.
a radiator cap has two valves: a(n) _________ valve and a(n) ________ valve. -
answer✔pressure; vacuum
define viscosity. - answer✔resistance to flow
internal combustion engines take ______ energy, convert it into _____ energy and then into
_____ energy. - answer✔chemical; heat; mechanical
engine coolant is usually composed of a mixture of ______% antifreeze and _______% water. -
answer✔50;50
Diesel engines employ ______ to ignite the air-fuel mixture. - answer✔high pressure
most internal combustion engines employ a ____-stroke cycle. - answer✔four
how do disc brakes work? - answer✔brake pads on both sides of a rotating disc are pinched
together to slow the disc's rotation.
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