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WorksheetsAdvanced Electrical Final Exam Review
Total questions: 60
Worksheet time: 30mins
Name
Class
Date
1.
A signal showing the voltage of a battery displayed on a digital storage oscilloscope (DSO) is being discussed. Technician A says that the display will show one horizontal line above the zero line. Technician B says that the display will show a line sloping upward from zero to the battery voltage level. 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
2.
Setting the time base to 50 ms per division will allow the technician to view a waveform how long in duration?
a)
400 ms
b)
500 ms
c)
50 ms
d)
200 ms
3.
Cycles per second are expressed in ________.
a)
duty cycle
b)
pulse width
c)
hertz
d)
slope
4.
A diode installed across a coil with the cathode toward the battery positive is called a(n) ________.
a)
SCR
b)
forward-bias diode
c)
clamping diode
d)
transistor
5.
A transistor is controlled by the polarity and current at the ________.
a)
collector
b)
emitter
c)
base
d)
Both collector and emitter
6.
What is the purpose and function of an inverter?
a)
The inverter changes low DC voltage to high DC voltage
b)
An inverter is used to change the polarity of DC voltages
c)
The inverter changes AC voltage to DC voltage
d)
An inverter changes DC voltage to AC voltage
7.
An LED can be used in a ________.
a)
headlight
b)
brake light
c)
taillight
d)
All of these
8.
Another name for a ground is ________.
a)
reference low
b)
logic low
c)
zero
d)
All of these
9.
Technician A says that module communications networks are used to reduce the number of wires in a vehicle. Technician B says that a communications network is used to share data from sensors, which can be used by many different modules. 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
10.
A high-speed CAN BUS communicates with a scan tool through which terminal(s)?
a)
6 and 14
b)
2 and 5
c)
4 and 16
d)
7 and 15
11.
How do CAN H and CAN L operate?
a)
CAN H goes to 3.5 volts when transmitting
b)
CAN H is at 2.5 volts when not transmitting
c)
CAN L is at 2.5 volts when not transmitting
d)
All of these
12.
The process of sending multiple signals of information at the same time over a signal wire and then separating the signals at the receiving end is called ________.
a)
rectifying
b)
multiplexing
c)
modulating
d)
Controller Area Network
13.
A data line has been diagnosed as being shorted to ground. Which of these would be the next step in diagnosing this problem?
a)
Replace the alternator
b)
Disconnect the battery and then test the data line
c)
Replace the BCM
d)
Unplug modules one at a time and re-test the data line
14.
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
15.
A starter motor rotates about ________ times faster than the engine?
a)
5
b)
2
c)
10
d)
18
16.
The overrunning clutch (starter drive) accomplishes which of the following?
a)
Protects the starter motor from spinning too rapidly
b)
Lets the starter motor rotate in either direction
c)
Brings the starter motor into contact with the ignition circuit
d)
Separates the starter motor from the starter solenoid
17.
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
18.
After installing the starter, the technician should perform which of the following?
a)
Check the starter for proper operation
b)
Attach the negative battery cable
c)
Perform a starter voltage drop test before starting the engine
d)
Both Check the starter for proper operation and Attach the negative battery cable
19.
All of these can cause a starter not to rotate, EXCEPT ________.
a)
seized engine crankshaft
b)
defective armature
c)
defective starter drive
d)
shorted field coils
20.
Technician A says that the diodes regulate the alternator output voltage. Technician B says that the field current can be computer controlled. 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
21.
Technician A says that a magnetic field is created in the alternator rotor. Technician B says that alternator output is increased if the speed of the alternator is decreased. 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
22.
Electronic voltage regulators use a temperature-sensitive resistor in the regulator circuit. This resistor, called a thermistor, provides lower resistance as the temperature ________.
a)
stays the same
b)
doubles
c)
increases
d)
decreases
23.
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
24.
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
25.
An alternator has no output. Technician A says that the alternator field circuit may have an open circuit. Technician B says that the fusible link may be open in the alternator to battery wire. 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
26.
Technician A says that the bulb trade number is the same for all bulbs of the same size. Technician B says that a dual-filament bulb has different wattage ratings for each filament. 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
27.
Light emitting diodes (LEDs) are used for lighting because they ________.
a)
have lower current draw
b)
have longer service life
c)
light quicker (faster illumination)
d)
Any of these
28.
Electrical feedback is usually a result of ________.
a)
lack of a proper ground
b)
incorrect wire size
c)
too high a voltage in circuit
d)
too much current (amperage) in a circuit
29.
Technician A says that the data displayed on the dash can come from the powertrain control module (PCM). Technician B says that a virtual display can be set to show what the driver wishes to see displayed. 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
30.
A customer complains that every time the lights are turned on in the vehicle, the dash display dims. Which of these is the MOST likely cause which of these conditions?
a)
Poor ground in lighting circuit causing a voltage drop to dash lamps
b)
Normal behavior for VTF (Vacuum Tube Fluorescent) dash display
c)
Feedback problem from a short-to-voltage between headlights and dash display
d)
Normal behavior for LED (Light Emitting Diode) dash displays
31.
Which of these electronic display devices uses a fluid and polarized glass to create numbers and characters?
a)
CRT
b)
LCD
c)
LED
d)
VFD
32.
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
33.
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
34.
On a vehicle equipped with a remote start system, which of these would cause the system to not work?
a)
Trunk is locked
b)
Doors are locked
c)
Shift lever in "PARK"
d)
Hood is open
35.
What is the purpose and function of an immobilizer system?
a)
Prevents the vehicle from starting or running if the correct key is not used
b)
To prevent entry inside the vehicle
c)
Requires that the driver enter a password to start the vehicle
d)
Only allows the use of the ignition key that is properly matched to the lock cylinder
36.
Immobilizer diagnostic trouble codes are often found under what area?
a)
Engine-related "P" codes
b)
Body-related "B" codes
c)
Chassis related "C" codes
d)
Either Body-related "B" codes or Chassis related "C" codes
37.
What will happen if a fault occurs in the immobilizer system when the engine is running?
a)
The engine will run at reduced power
b)
The security light will come on but the engine will not be shut off
c)
The security light will come on and the engine will shut off
d)
None of these
38.
The primary (low-voltage) ignition system must be working correctly before any spark occurs from a coil. Which component is NOT in the primary ignition circuit?
a)
Ignition switch
b)
Ignition module
c)
Spark plug wires
d)
Pick up coil
39.
A COP ignition system can be called ________.
a)
coil-near-plug
b)
coil-over-plug
c)
coil-by-plug
d)
Any of these
40.
Technician A says that a two-wire COP system uses the PCM to trigger the coil. Technician B says that a three-wire COP system has an ignition module built into the coil assembly. 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
41.
Which statement below is correct?
a)
Most ignition systems work by switching the positive side of the coil windings to power.
b)
Most ignition systems work by switching the circuit grounding the ignition coil's secondary windings.
c)
Most ignition systems work by switching the circuit to power the ignition coil's secondary windings.
d)
Most ignition systems work by switching the negative side of the coil primary windings to ground.
42.
Technician A says that the primary and secondary ignition systems are never connected. Technician B says that the primary and secondary windings are connected in some ignition coils. 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
43.
Technician A looks for engine speed (RPM) when cranking an engine that will not start. Technician B says that a problem in the primary circuit could make the tachometer not work. 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
44.
Technician A says that a defective spark plug wire or boot can cause an engine misfire. Technician B says that a tracked ignition coil can cause an engine misfire. 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
45.
Poor engine performance could be the result of a ________.
a)
distributor ignition with the CMP and CKP not correctly indexed
b)
defective coil
c)
a high-voltage spark leak
d)
Any of these
46.
Two technicians are discussing a no-start (no spark) condition. Technician A says that an open CKP sensor could be the cause. Technician B says that a defective ignition control module (ICM) could be the cause. 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
47.
The four basic computer functions include ________.
a)
data gathering, processing, output, and evaluation
b)
input, processing, storage, and output
c)
sensing, calculating, actuating, and processing
d)
writing, processing, printing, and remembering
48.
The "brain" of the computer is the ________.
a)
RAM
b)
CPU
c)
AD converter
d)
PROM
49.
Which item is a computer input sensor?
a)
Throttle position angle
b)
RPM
c)
Engine coolant temperature
d)
All of these
50.
Which item is a computer output device?
a)
Evaporative emission control solenoid
b)
Fuel injector
c)
Transmission shift solenoid
d)
All of these
51.
The first fuel filter in the sock inside the fuel tank normally filters particles larger than ________.
a)
0.001 to 0.003 inches
b)
70 to 100 microns
c)
0.010 to 0.030 inches
d)
10 to 20 microns
52.
The amperage draw of an electric fuel pump is higher that specified. All of the following are possible causes EXCEPT ________.
a)
corroded electrical connections at the pump motor
b)
defective fuel pump
c)
clogged fuel filter
d)
restriction in the fuel line
53.
Technician A says that the fuel pump relay is usually controlled by the PCM. Technician B says that a TBI injector squirts fuel above the throttle plate. 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
54.
What determines the amount of fuel injected when an injector opens?
a)
The spacing between the pintle and the pintle spring
b)
The distance the pintle travels (more travel, more fuel)
c)
The variable diameter of the injector solenoid coil
d)
Length of time the injector is open
55.
Technician A says that all injectors in a sequential fuel injection system often use the same power wire. Technician B says that each injector in a sequential fuel injection system should have a different ground wire. 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
56.
Two technicians are discussing catalytic converters. Technician A says that the exhaust should have a 14.7:1 air-fuel ratio for the best efficiency. Technician B says that the air-fuel mixture must be leaner than 14.7:1 for best performance from a three-way catalytic converter. 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
57.
Two technicians are discussing the testing of a catalytic converter. Technician A says that a vacuum gauge can be used and observed to see if the vacuum drops with the engine at 2500 RPM for 30 seconds. Technician B says that a pressure gauge can be used to check for backpressure. 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.
A P0422 (catalytic converter efficiency failure) is set. What is a possible cause?
a)
Engine mechanical fault
b)
Fuel contamination
c)
Exhaust leak
d)
Any of these
59.
Some vehicles have a "mini converter." Where is this component located?
a)
Just upstream of the muffler
b)
Attached directly to the exhaust manifold
c)
Downstream of the main catalytic converter
d)
None of these
60.
When observing O2S waveforms on a DSO on an OBD-II vehicle, which O2 sensor should have more oscillations in its O2S waveform?
a)
Downstream
b)
Upstream
c)
They will be equal
d)
None of these
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