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WorksheetsFundamentals of Electricity Final Review
Total questions: 59
Worksheet time: 30mins
Name
Class
Date
1.
An electrical conductor is an element with ________ electrons in its outer orbit.
a)
less than 2
b)
more than 4
c)
exactly 4
d)
less than 4
2.
Technician A says that a two-wire variable resistor is called a rheostat. Technician B says that a three-wire variable resistor is called a potentiometer. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
3.
A potentiometer, a three-wire variable resistor, is used in which type of sensor?
a)
Throttle position (TPS)
b)
Knock Sensor (KS)
c)
Manifold absolute Pressure (MAP)
d)
Barometric Pressure Sensor (BARO)
4.
What term describes the movement of electrons from one atom to another?
a)
Chain reaction
b)
Energy transfer
c)
Electricity
d)
None of these
5.
If an insulated wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle, the type of failure would be called a(n) ________.
a)
chassis ground
b)
open
c)
short to voltage
d)
short to ground
6.
If 12 volts are being applied to a resistance of 3 ohms, ________ amperes will flow.
a)
36
b)
12
c)
3
d)
4
7.
High resistance in a circuit can cause ________.
a)
slow motor operation
b)
clicking of relays or solenoids
c)
dim lights
d)
Any of these
8.
A circuit with a short to voltage may cause ________.
a)
improper operation of loads in the circuit
b)
other circuits to malfunction
c)
Both improper operation of loads in the circuit and other circuits to malfunction
d)
Neither improper operation of loads in the circuit nor other circuits to malfunction
9.
Technician A says that the sum of the voltage drops in a series circuit should equal the source voltage. Technician B says the current (amperes) varies depending on the value of the resistance in a series circuit. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
10.
The current flowing into each junction of a parallel circuit ________ the current flow at the junction on the opposite end of that branch.
a)
is more than
b)
equals
c)
is less than
d)
None of these
11.
The total circuit resistance of a parallel circuit is always ________ the lowest resistance present in any branch of the circuit.
a)
more than
b)
less than
c)
equal to
d)
None of these
12.
Knowledge of parallel circuit fundamentals is necessary to diagnose ________.
a)
diesel glow plug circuits
b)
add-on lighting circuits
c)
port fuel injection circuits
d)
All of these
13.
How can a test light be used to test a ground connection?
a)
By connecting the tip of the test light to a good ground with the other end to the positive terminal of a battery
b)
By touching the ground lead to the tip of the test light
c)
By touching both the tip and the ground clip to the positive terminal of a battery
d)
None of these
14.
A meter used to measure amperes is called a(n) ________.
a)
ammeter
b)
coulomb meter
c)
ampmeter
d)
amp meter
15.
A voltmeter should be connected to the circuit being tested ________.
a)
only when no power is flowing
b)
in parallel
c)
in series
d)
Both only when no power is flowing and in series
16.
An ohmmeter should be connected to the circuit or component being tested ________.
a)
with current flowing in the circuit or through the component
b)
only when no power is flowing (electrically open circuit)
c)
when connected to the battery of the vehicle to power the meter
d)
Both only when no power is flowing (electrically open circuit) and when connected to the battery of the vehicle to power the meter
17.
The higher the AWG number, ________.
a)
the smaller the wire diameter
b)
the more strands in the conductor core
c)
the larger the wire diameter
d)
the thicker the insulation
18.
Which statements are TRUE about wire, terminals, and connectors?
a)
A wire is called a lead, and the metal end is a connector.
b)
A connector is usually a plastic piece where terminals lock in.
c)
A lead and a terminal are the same thing.
d)
Both A wire is called a lead, and the metal end is a connector and A lead and a terminal are the same thing are correct
19.
The type of solder that should be used for electrical work is ________.
a)
60/40 with no flux
b)
acid core
c)
rosin core
d)
50/50 with acid paste flux
20.
On a wiring diagram, S110 with a ".8 BRN/BLK" means ________.
a)
a connector with 0.8 square millimeter wire
b)
circuit # .8 spliced under the hood
c)
a splice of a brown with black stripe, wire size being 0.8 square millimeters (18 gauge AWG)
d)
Both a connector with 0.8 square millimeter wire and circuit # .8 spliced under the hood
21.
Two technicians are discussing finding a short to ground using a test light. Technician A says that the test light, connected in place of the fuse, will light when the circuit that has the short is disconnected. Technician B says that the test light should be connected to the positive (+) and negative (-) terminals of a battery during this test. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
22.
A box drawn with dashed lines in a wiring diagram indicates ________.
a)
a complete circuit
b)
a portion of a component
c)
a complete component
d)
None of these
23.
A box drawn with a solid line in a wiring diagram indicates ________.
a)
a transistor
b)
a resistor
c)
a complete component
d)
a portion of a component
24.
A capacitor ________.
a)
blocks DC
b)
passes AC
c)
stores electrons
d)
All of these
25.
To increase the capacity, what could be done?
a)
Connect another capacitor in parallel
b)
Connect another capacitor in series
c)
Add a resistor between two capacitors
d)
Both Connect another capacitor in parallel and Connect another capacitor in series
26.
Which event causes the capacitor to retain a voltage potential?
a)
Open circuit
b)
Closed circuit
c)
Both Open circuit and Closed circuit
d)
Both Open circuit and Closed circuit
27.
Capacitance is governed by all of these EXCEPT ________.
a)
surface area of the condenser plates
b)
dielectric material used
c)
conductor diameter
d)
space between condenser plates
28.
Technician A says that a relay is an electromagnetic switch. Technician B says that a solenoid uses a movable core. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
29.
Two technicians are discussing ignition coils. Technician A says that some ignition coils have the primary and secondary windings electrically connected. Technician B says that some coils have totally separate primary and secondary windings that are not electrically connected. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
30.
Technician A says that magnets are used in some crankshaft position sensors. Technician B says magnets are used in potentiometers. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
31.
Technician A says that magnetism can cause electric current to flow in a conductor. Technician B says that magnetic lines of flux can never penetrate rubber insulation on a conductor. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
32.
When a battery becomes completely discharged, both positive and negative plates become ________ and the electrolyte becomes ________.
a)
H2SO4; Pb
b)
PbO2; H2SO4
c)
PbSO4; H2SO4
d)
PbSO4; H2SO4
33.
Battery electrolyte is a mixture of water and ________.
a)
sulfuric acid
b)
lead sulfate
c)
lead peroxide
d)
sulfur dioxide
34.
Technician A says that maintenance-free batteries use a large amount of water. Technician B says that maintenance-free batteries use materials that reduce the amount of water used by the battery. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
35.
Battery hold-down clamps or brackets help reduce ________, which can greatly reduce the capacity and life of any battery.
a)
temperature
b)
heat
c)
cycling
d)
vibration
36.
What precautions are needed when charging an AGM type battery?
a)
Keep the charging time to less than one hour
b)
Keep the charger away from the battery as far as possible
c)
Charging voltage should be at or below 14.4 volts
d)
Charging amperage should be set to less than 10 amperes
37.
When jump starting ________.
a)
the last connection should be the positive post of the dead battery
b)
the last connection should be the engine block of dead vehicle
c)
the alternator must be disconnected on both vehicles
d)
Both the last connection should be the positive post of the dead battery and the alternator must be disconnected on both vehicles are correct
38.
Technician A says that electronic conductance testing can determine CCA, state-of-charge, and voltage of the battery. Technician B says that electronic conductance testing can determine if there is a bad cell, requiring battery replacement. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
39.
Vehicles equipped with diesel engines may have two batteries connected in parallel in order to provide additional current at the same voltage. Technician A says to successfully test the batteries, they should be disconnected and tested separately. Technician B says that a fault in one battery has NO effect on the other battery. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
40.
Starter motors operate on the principle that ________.
a)
the field coils rotate in the opposite direction from the armature
b)
the armature rotates from a strong magnetic field toward a weaker magnetic field
c)
like magnetic poles repel
d)
opposite magnetic poles repel
41.
Technician A says that a defective solenoid can cause a starter whine. Technician B says that a defective starter drive can cause a starter whining noise. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
42.
A starter motor rotates about ________ times faster than the engine?
a)
5
b)
2
c)
10
d)
18
43.
Technician A says that the starter control circuit includes the ignition switch, neutral safety (clutch) switch, and solenoid. Technician B says that the power circuit includes the battery, battery cables, solenoid, and starter motor. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
44.
Which one of these would NOT be a diagnostic step when diagnosing a "no crank" customer concern?
a)
Test for proper operation of the starter enable relay
b)
Check the battery with a load test
c)
Check the condition of the engine oil
d)
Check the operation of the theft deterrent system
45.
A technician connects one lead of a digital voltmeter to the positive (+) terminal of the battery and the other meter lead to the battery terminal (B) of the starter solenoid and then cranks the engine. During cranking, the voltmeter displays a reading of 878 mV. Technician A says that this reading indicates that the resistance of the positive battery cable is too high. Technician B says that this reading indicates that the starter is defective. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
46.
Technician A says that the cranking circuit should be tested for proper amperage draw. Technician B says that an open in the control circuit will not prevent starter motor operation. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
47.
A magnetic field created in the ________ is used to induce a voltage in the ________.
a)
rotor; stator
b)
drive end frame; OAD
c)
stator; rear housing
d)
diodes; stator
48.
How is the AC current produced in the alternator changed to DC current?
a)
Alternating brushes
b)
Mechanical switches
c)
By diodes inside the alternator
d)
Slip ring rotation
49.
In order to control the output of the alternator, the voltage regulator controls the ________ of the alternator.
a)
stator connections
b)
field current
c)
RPM
d)
diodes
50.
Which of these is TRUE about an alternator with an overrunning pulley?
a)
Replacement pulley must be the overrunning type
b)
It can use a conventional replacement pulley
c)
Both Replacement pulley must be the overrunning type and It can use a conventional replacement pulley
d)
Neither Replacement pulley must be the overrunning type nor It can use a conventional replacement pulley
51.
A duty cycle of 90% means the circuit is off most of the time.
a)
true
b)
false
52.
To check the charging voltage, connect a digital multimeter (DMM) to the positive (+) and negative (-) terminals of the battery and select ________.
a)
DC amps
b)
AC volts
c)
DC volts
d)
AC amps
53.
When testing an alternator minimum required output, what is an acceptable reading?
a)
Over 100 amperes higher than the accessory load
b)
2 to 5 amperes
c)
Five amperes greater than the accessory load
d)
Less than 3 amperes
54.
Technician A says that charging system testing requires that the battery be at least 75% charged. Technician B says that a digital multimeter can not be used to test charging system voltage. Who is right?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
55.
All of these alternator components should be electrically tested, EXCEPT ________.
a)
diodes
b)
rotor
c)
stator
d)
end frame
56.
In most recent model vehicles, the horn button is an input to the ________, which then activates the horn circuit.
a)
instrument cluster
b)
horn relay
c)
fuse controller
d)
BCM
57.
Technician A says that the cruise control on a vehicle that uses an electronic throttle control (ETC) system uses a servo to move the throttle. Technician B says that the cruise control on a vehicle with ETC uses the APP sensor to set the speed. Which technician is correct?
a)
Technician A only
b)
Technician B only
c)
Both Technician A and Technician B
d)
Neither Technician A nor Technician B
58.
Most vehicles use ________ to control the actual operation of the wipers.
a)
variable resistors
b)
the BCM
c)
changing the voltage to the brushes
d)
changing the position of the brushes
59.
PM motors used in power windows, mirrors, and seats can be reversed by ________.
a)
sending current to a reversed field coil
b)
using a relay and a two-way clutch
c)
reversing the polarity of the current to the motor
d)
using a reverse relay circuit
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