ELECTRICAL SYSTEMS – FINAL
QUESTIONS AND ANSWERS
h Regardless of the way it is produced, electricity is always the movement of protons in a conducting
circuit. - False
Two technicians are discussing electron flow. Tech A says that in "conventional theory" current is
believed to flow from positive to negative. Tech B says that in "electron theory" current is believed to
flow from negative to positive. Who is correct? - Both A and B
An atom with more electrons than protons has an overall positive charge and is called a positive ion. -
False
Two technicians are discussing a series circuit with four resistors of various resistances. Tech A says that
current flow will be different in each resistor. Tech B says that current flow will be the same in each
resistor. Who is correct? - Tech B
Atoms that gain electrons become positively charged. - False
A disconnected battery is _____, and is _____. - Not doing work; still a source of energy
What is all matter composed off? - Atoms
Electricity can perform work if it is directed at objects that can _______ the moving particles, such as
lights and electric motors. - Extract energy form
A faulty circuit may have_______. - High resistance, No continuity
Every atom has a _________, with at least one positively charged _____ and, in most atoms, at least one
_____ that has no charge. - Nucleus, Proton, Neutron
What is one by-product of electricity flow? - Heat
Atoms with fewer electrons in the valence ring are the best conductors, with one electron being the best
conductive material. - True
An ignition coil can be described as a step-up transformer - True
Tech A says that if resistance stays the same and voltage goes up, then amperage goes down. Tech B says
that if voltage stays the same and resistance goes down, then amperage goes down. Who is correct? -
Neither A nor B
Vehicle alternators are designed for use on what type of ground system? - Negative
Tech A says AC stands for alternating voltage. Tech B says DC is used in electric motors on most hybrid
vehicles. Who is correct? - Neither A nor B
If the pressure (_____) stays the same but the restriction (_____) doubles, then the electrons (_____)
will be reduced by half. - Volts, Ohms, Amps
, The device which is used to measure the amount of resistance in a component or a circuit is a(n): -
Ohmmeter
The power source pushes a flow of electrons (current flow), measured in amps, when the switch is in the
closed position, completing the path. - True
Many vehicles connect the chassis and body to the negative battery terminal, which means most of the
metal components on the vehicle are grounded. - True
Polarity-sensitive components always have the polarity marked on both connections to ensure that the
user connects them into the circuit correctly. - False
Tech A says you should never strip wires with a knife or other sharp tool. Tech B says it's ok to repair
wires with solderless connectors if done properly. Who is correct? - Both A and B
Be careful of the chart you use, because many of them allow up to a ____ voltage drop over the length
of the wire, which is more than is allowed in most automotive circuits. - 0.1
Electronic delay circuits are used to: - Delay the turning off of devices
To identify their value, many resistors are marked with _____ colored bands - Four or five
Resistors are commonly used to control the _____ that reaches various components - Both A and B
Be careful of the wire size application chart you use, because many of them allow up to a ____ voltage
drop over the length of the wire, which is more than is allowed in most automotive circuits. - 0.1
The most effective and safest tool to use to strip insulation from electrical wire is a: - Set of wire strippers
Technician A says that solder typically used in automotive electrical applications is 20% Tin and 80% lead.
Technician B says soldered wire repairs should have a good mechanical connection as well as a good
electrical connection. Who is correct? - Technician B
Potentiometers are mechanical variable resistors with ____ connections, ______. - Three, two fixed and
one movable
It is important to understand that current flow is ____________ to resistance. - Inversely proportional
Two technicians are discussing solder wire repair. Technician A says that electrical tape can be used to
cover the joint. Technician B says that heat shrink tubing can be used to cover the joint. Who is correct? -
Both A and B
Wiring harnesses run _____. - Around the engine bay, Through the dash and interior cabin, To the rear of
the vehicle
A compass is used to _______. - Show that when energized, the relay winding produces a magnetic field
Tech A says you should use a rosin core solder when repairing electrical circuits. Tech B says you should
not overheat the repair. Who is correct? - Both A and B
A variable resistor: - has a movable arm that swipes across a coil that has less resistance at one end and
more at the other.
QUESTIONS AND ANSWERS
h Regardless of the way it is produced, electricity is always the movement of protons in a conducting
circuit. - False
Two technicians are discussing electron flow. Tech A says that in "conventional theory" current is
believed to flow from positive to negative. Tech B says that in "electron theory" current is believed to
flow from negative to positive. Who is correct? - Both A and B
An atom with more electrons than protons has an overall positive charge and is called a positive ion. -
False
Two technicians are discussing a series circuit with four resistors of various resistances. Tech A says that
current flow will be different in each resistor. Tech B says that current flow will be the same in each
resistor. Who is correct? - Tech B
Atoms that gain electrons become positively charged. - False
A disconnected battery is _____, and is _____. - Not doing work; still a source of energy
What is all matter composed off? - Atoms
Electricity can perform work if it is directed at objects that can _______ the moving particles, such as
lights and electric motors. - Extract energy form
A faulty circuit may have_______. - High resistance, No continuity
Every atom has a _________, with at least one positively charged _____ and, in most atoms, at least one
_____ that has no charge. - Nucleus, Proton, Neutron
What is one by-product of electricity flow? - Heat
Atoms with fewer electrons in the valence ring are the best conductors, with one electron being the best
conductive material. - True
An ignition coil can be described as a step-up transformer - True
Tech A says that if resistance stays the same and voltage goes up, then amperage goes down. Tech B says
that if voltage stays the same and resistance goes down, then amperage goes down. Who is correct? -
Neither A nor B
Vehicle alternators are designed for use on what type of ground system? - Negative
Tech A says AC stands for alternating voltage. Tech B says DC is used in electric motors on most hybrid
vehicles. Who is correct? - Neither A nor B
If the pressure (_____) stays the same but the restriction (_____) doubles, then the electrons (_____)
will be reduced by half. - Volts, Ohms, Amps
, The device which is used to measure the amount of resistance in a component or a circuit is a(n): -
Ohmmeter
The power source pushes a flow of electrons (current flow), measured in amps, when the switch is in the
closed position, completing the path. - True
Many vehicles connect the chassis and body to the negative battery terminal, which means most of the
metal components on the vehicle are grounded. - True
Polarity-sensitive components always have the polarity marked on both connections to ensure that the
user connects them into the circuit correctly. - False
Tech A says you should never strip wires with a knife or other sharp tool. Tech B says it's ok to repair
wires with solderless connectors if done properly. Who is correct? - Both A and B
Be careful of the chart you use, because many of them allow up to a ____ voltage drop over the length
of the wire, which is more than is allowed in most automotive circuits. - 0.1
Electronic delay circuits are used to: - Delay the turning off of devices
To identify their value, many resistors are marked with _____ colored bands - Four or five
Resistors are commonly used to control the _____ that reaches various components - Both A and B
Be careful of the wire size application chart you use, because many of them allow up to a ____ voltage
drop over the length of the wire, which is more than is allowed in most automotive circuits. - 0.1
The most effective and safest tool to use to strip insulation from electrical wire is a: - Set of wire strippers
Technician A says that solder typically used in automotive electrical applications is 20% Tin and 80% lead.
Technician B says soldered wire repairs should have a good mechanical connection as well as a good
electrical connection. Who is correct? - Technician B
Potentiometers are mechanical variable resistors with ____ connections, ______. - Three, two fixed and
one movable
It is important to understand that current flow is ____________ to resistance. - Inversely proportional
Two technicians are discussing solder wire repair. Technician A says that electrical tape can be used to
cover the joint. Technician B says that heat shrink tubing can be used to cover the joint. Who is correct? -
Both A and B
Wiring harnesses run _____. - Around the engine bay, Through the dash and interior cabin, To the rear of
the vehicle
A compass is used to _______. - Show that when energized, the relay winding produces a magnetic field
Tech A says you should use a rosin core solder when repairing electrical circuits. Tech B says you should
not overheat the repair. Who is correct? - Both A and B
A variable resistor: - has a movable arm that swipes across a coil that has less resistance at one end and
more at the other.
