62 terms

asvab 2017-2018


Terms in this set (...)

personal computer processor chip that interprets and carries out the basic instructions that operate the computer.
which of the following is not considered an input device?
A. Mouse
E. Monitor
A hard disk provides
more capacity than a zip disk.
an element that allows electrons to flow freely
a valence shell that is more than half or completely full.
neither a good conductor or a good insulator but is useful for making electronic components
has a negative charge, stays in motion around the nucleus, the third type of subatomic particle. occupies the shells.
has a positive charge, and found within the nucleus.
neutrally charged, also found within the nucleus.
heaviest part of the atom and accounts for a majority of the atoms mass
the outer shell of an atom
valence shell
rate of flow of electrons through a conductor
measured by the amount of charge flowing past per unit of time
Electrical Current
Current is measured in _____
Amperes (A)
electrical pressure
Voltage (V)
An ampere is defined as a
coulomb (C)
For an electron the pressure is caused by
electromagnetic compulsion from a large negative charge
___________ and __________ are directly proportional
current and voltage
between two points in a circuit is the work done in moving unit charge (i.e. one coulomb) from one point to the other. Measured in Joules per Coulomb/Volt 1Volt=1 Joule or Coulomb
Electrical Potential Difference
how is voltage measured?
a voltmeter
opposite of the flow of current
how is resistance measured?
amount of resistance that will allow one ampere of current to flow if one volt of electrical pressure is placed on a conductor
considered one OHM
As resistance is a conductor increases
current flow decreases, causing current and resistance to be inversely proportional
The smaller resistance an object has,
the better a conductor it is
Voltage and Current are what kind of proportional?
Directly proportional
An object with a high resistance requires what to get the same current?
a higher voltage.
generate power to drive the wheels and various accessories. removes access heat from the engine.
includes starting, charging, and lighting
Engine systems
circulates motor oil all through the engine to reduce friction and makes the engine run more smoothly.
lubrication system
ensure that correct amounts of air and fuel are available for efficient combustion in the engine
combustion system
generates and times the spark that initiates combustion
ignition systems
forms a pipeline for waste gases to be removed from the engine and then dissipated to the open atmosphere
exhaust system
control all aspects of vehicle operation, including engine, drive train, brakes, and suspension.
accessory system
transmits power from the engine to the vehicles drive wheels and the suspension and the steering systems. (made up of the drive train system)
chassis system
control the vehicles ride quality and handling and the break system.
suspension/steering system.
stops vehicle safely and predictably
break system.
rapid burning of an air-fixed mixture
type of engine used in automobiles
internal combustion system
fuel is burned internally, the resulting heat is used directly to power an engine.
internal combustion
forms the frame work for the engine cylinders and reciprocating assembly.
engine block.
cylindrically shaped object with a solid top that moves up and down in the engines cylinders
forms a guide for the piston to move in; allows the piston to move up and down as the engine completes its cycle.
seals the piston to the cylinder and prevents combustion gases from leaking past
piston ring
connects the piston to the connecting rod, forms a pivot point for the small end of the connecting rod to move on.
wrist pin
connects the piston/wrist pin assembly to the engines crankshaft
connecting rods
converts the linear motion of the piston into rotary motion, which is then used to power a vehicle or drive an accessory.
stores electrical energy in chemical form. provides direct current for engine starting and accessory operation
responsible for cranking the engine to get it started
starting system
responsible for supplying electrical current to charge the batter, as well as for vehicle operation
Charging system
headlights, marker lights, break lights, tail lights
Lighting System
rear view window defogger, windshield wipers, stereo, blower motors, all other electrically powered accessories.
main component of the starter system
controls output of the alternator
voltage regulator
what it the normal system voltage during engine operation?
around 14.5 volts
area in physics that encompasses the laws of motion, energy, and forces
the measures if the total quantity of matter in an object
used to refer to an objects resistance to change in its motion (property of mass)
a push or pull
refers to the total force acting on an object
net force
expresses the linear relationships between either the mass of the moved object or the desired acceleration
F (newton) = m (kg) * a (meters per/sec)
newtons 2nd law
for every action, there is an equal and opposite reaction
newtons 3rd law
describes the unchanging state of motion of an object when it experiences no net force
newtons 1st law