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2023 Electrical 2 Flashcards | StudBud
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2023 Electrical 2
2023 Electrical 2
100 terms
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Questions
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Answers
1
the correct trade number of a bulb is always used for replacement BC
prevents circuit/componant damage
keeps amps the same
All
keeps circuit resistance the same
2
Which item is a computer output actuator deivce
evaporative emission control solenoid
fuel injector
All
transmission shift solenoid
3
The ______ is unit of electrical pressure
Volt
Ampere
Ohm
Coulomb
4
Clamping diodes long ass answers
A
D
C
B
5
Tech A says that SCR stands for Silicon controlled rectifier. Tech B says SCR are commonly used in CHMSL circuits
B
A
Neither
Both
6
typical IAT or ECT sesnor reads about 3000 ohms when tested using a DMM this represents a temperature of approx.
70F
-40F
284 F
120F
7
The type of solder used for electrical work is
50/50 with acid paste flux
Rosin core
60/40 with no flux
acid core
8
Tech A says solid state flashers will cause turn indicator to flash rapidly if a bulbs burned out. Tech B says variable
A
B
C
-load flashers will function for turn signal useage although wont warn driv
9
Pulse width is measured in
cycles per second
hertz
% of on time
ms
10
Cycles per second is expressed in
slope
hertz
pulse width
duty cycle
11
which type of sensor uses a burn-off circuit
hot wire mass airflow sensor
oxygen sensor
hot film mass airflow sensor
vane type airflow sensor
12
when viewing a injectors waveform on a DSO the signal lead CH1 should be connected to
the injector power side
Neither
either a or b
the injector ground side
13
Just review chapter 9. its a bunch of schematic questions
True
False
14
when a diode is forward biased
current flows through the diode when it reaches its breakdown voltage
holes and electrons migrate away from the P-N junction
None are correct
current flows through the diode
15
Actuators that may be controlled by a transistor include
All
fuel injector
ignition coil
MIL light
16
Fuel injectors are ______
ground side switched
power side switched
transistor controller
A and B
17
transistor best unitilzed for ________ applications
neither
Both
low freqency HI current
high freq low current
18
Which statement is true about wire, terminals and connectors
Red and Yellow
a lead and terminal are the same thing
wire is called a lead, and the metal end is a connector
a connector is usually a plastic piece where terminals lock in
19
Tech A says that Volt divider circuit will include a current limiting resistor. tech b says current limiting resistor
Neither
A. is located in the wiring leading to the sensor
B
Both
20
A transistor can
All
Amplify
throttle
switch on and off
21
Tech A say the modules process analog sensor signals using a DAC Tech B say keep alive mem is erased when BAT disconectd
B
A
D
C
22
All of the following are true except
the dimmer switch can only be located of the ground side of the headlamp
a low beam sealed beam will have 3 terminals
headlights are controlled by the headlight switch
Hid stands for high intensity discharge
23
Carbon and silicon are examples of
photoelectric materials
insulators
semiconductors
conductors
24
CPU can only process ________ signals
Digital DC
Digital AC
Analog AC
Analog DC
25
a solenoid converts electrcal evergy into motion through the principle of
linear motion
mutual induction
electromagnetism
self induction
26
All of the following are componants in a DC motor except
Rotor
commutator
brushes
Armature
27
Daytime running lights DRLS turn on the __________ when in operation
headlights in series of serpate lights
Fog lights
driving lights
side marker lights
28
Tech a says solenoids can be used to mechanically control something. Tech B says solenoids can be used as a flow valve
B
Neither
A
Both
29
.
B
C
D
A
30
Tech A says digital storage oscilloscope can store the waveform for viewing later. Tech B says that trigger level has to
neither
Be set on most scopes to be able to view a changing waveform A
Both
B
31
.
A
C
B
D
32
a defective brake switch could prevent operation of the _______
cruise control
ABS brakes
All
shift interlock
33
All of the following are true except
halogen bulbs can be handled like any other headlamp
halogen headlamps need to be aimed like any other headlamp
halogen bulbs are normally mounted in composite headlamp assemblies
Halogen bulbs operate between 500 to 1300 degrees F
34
Tech A says both inputs and outputs can be digital. Tech B says AC signals can be digital
Both
Neither
A
B
35
Tech A says the map sensor is used to dtermine the engine load. Tech B sayd as MAP pressure increase MAP V decreases
B
A
D
C
36
which parameters are monitored by automotive sensors
Engine RPm
All
Engine coolant Temp
Throttle position
37
Current is measured in
microamps
all
milliamps
amperes
38
which describes acceptable upstream oxygen sensor activity as measured with a DMM set to read DC Volts
0.450 and steady
0.450 to 0.850v
0.150 to 0.950V
0.350 to 0.550V
39
What causes a fuse to blow
A and B
an increase in current flow through the circuit
a decrease in circuit resistance
a sudden decrease in current flow through the circuit
40
typical TP sensor voltage is idle is about
2.5 to 2.8V
0.5V or 10% of WOT TP sensor voltage
1.5 to 2.8V
13.5 to 15V
41
an intake air temperture IAT sensor measures
12V when cold
high resistance when cold
0V when cold
low resistance when cold
42
Setting the time base to 50ms/div will allow tech to view a waveform how long
200ms
500ms
400ms
50ms
43
N-type material ________
Neither
is created by doping silicon with and element that has 3 outer electrons
Both
has free electrons
44
a lamp with low resistance filament emits _____ a higher resistance filament
more light than
none
less light than
the same ammount of light as
45
An automotive application of the magnetic transformer coil is the
Solenoid
Relay
Variable reluctance sensor
Ignition coil
46
Tech A says that a diode can be used to eliminate Hi voltage spikes. Tech B says diodes are electrical one way valves
Neither
A
B
Both
47
the brain of the computer is
CPU
A/D converter
PROM
RAM
48
another name for computer ground is
reference low
logic low
All
zero
49
a semiconductor is a material ___________
None
with fewer than 4 electrons in its outer orbit of its atoms
with more than 4 electrons in its outer orbit of its atoms
with exactly 3 electrons in its outer orbit of its atoms
50
if a exposed wire touched the body of a vehicle the fail would be called what
an open
a chassis ground
short to voltage
short to ground
51
All of the sensors produce a digital dc signal except
SPST switch
variable reluctance sensor
Hall effect switch
phototransistor
52
all OBDII vehicles use what type of read only memory
EPROM
ROM
EEPROM
PROM
53
A vehicle has 4 taillight bulbs all connected in parallel. if 1 bulb burns out (opens) the current flow will ______
drop to zero and the other 3 bulbs go out
remain the same because all the bulbs are wired in parallel
increase and other bulbs get brighter
decrease because only 3 bulbs are operating
54
if a #1157 bulb were installed in the left front parking brake socket instead of a #2057 bilb what would most likely hap
left turn signal would flash faster
left turn signal would flash slower
left parking light would be slightly brighter
left parking light would be slightly dimmer
55
the transistors used to control actuators are located on the ________ side of the load
left
ground
power
56
Another name for toothed trigger wheel is
both
tone wheel
neither
reluctor
57
Tech A says the diode is reverse biased when current flows from left to right. Tech B says diode has breakdown Voltage
A
C
D
B
58
middle one is a B sorry for bad pic
a diode
N type
P type
P-N junction
59
.
B
D
C
A
60
______ can be used to provide info on the position of moving parts
Both
variable reluctance sensors
Neither
Hall effect sensors
61
Tech A says As NTC thermistors temp go down resistance go up. Tech B says voltage across will go up
A
B
Neither
Both
62
an ambient light sensor is used to control
automatic dimming headlights
automatic headlights
fog lights
daytime running lights DRLs
63
1156A bulb. Tech A says the bulb is amber colored. Tech B says the bulb could be used for tail lights and brake lights.
Neither
A
Both
B
64
As resistance increases in a circuit, current _____ (when voltage stays the same)
increases
decreases
stays the same
none
65
Stepper motors are the same as a DC motor
False
True
66
if 12V are applied to 4 Ohms of resistance _____ amps will flow
4
3
12
36
67
the sensor that LEAST determines fuel delivery when a fuel injected engine is first started is the ______
o2 sensor
engine map sensor
BARO sensor
engine coolant temp sensor
68
four basics computer functions include
data,gathering,processing,output,evaluation
sensing,calculating,actuating and processing
input,processing,storage,output
writing,processing,printing,remembering
69
A TP sensor is what type of sensor
Rheostat
Potentiometer
Piezoelectric
Voltage generating
70
All will generate an anlog DC signal except
o2 sensor
optical sensor
engine coolant temp sensor
throttle position sensor
71
2
A
D
C
B
72
As temperature decreases
the resistance of a conductor decreases
the resistance of a conductor remains the same
the resistance of a conductor increases
the voltage of the conductor decreases
73
Current limiting resistors are normally installed
inside the PCM
Both A and B
between sensor and ground
between the refence voltage supply and the sensor
74
DSO is being used to measure Freq of an AC voltage waveform if one cycle is 10MS the Freq of the waveform would be
6hz
10khz
100hz
600hz
75
A transistor is controlled by the polarity and current at
the collector
the base
the emitter
Both A and B
76
.
B
C
D
A
77
Tech a says ignition coils are known as step up transformers bc they + current - voltage Tech B says
B
D
more winding in the secondary winding than the primary winding A
C
78
when using ohms law whenever ____ variables are know the last can be calculated
2
3
1
4
79
Forward bias voltage required for an LED is
4.5 - 5.1V
.5 - .7V
.3 - 0.5V
1.5 - 2.2V
80
Unlike charges _______
repel
Neutralize eachother
attract
add
81
The transistor symbol has an arrow that is located at the ______
Base
emitter
gate
collector
82
How many watts are consumed by a lightbulb if 0.83 amps are measured when 12V are applied
10
14.4
.10
144
83
Tech A says switching transistors operate similar to relays. Tech B says relays are for High speed low current circuits
Neither
A
Both
B
84
the sensor that must be warmed up and functioning before the engine management will goto closed loop is the ______
MAP
ECT
BARO
O2S
85
.
D
A
C
B
86
Tech A says this signal could be generated by a hall effect sensor. tech B says this is Analog DC
B
A
Both
Neither
87
.
B
A
Both
Neither
88
as the load on an engine increases the manaifold vacuum ____ and the manifold absolute pressure increases
changes with barometric pressure only
remains constant
increases
decreases
89
Tech A says bulb trade number is the same for all bulbs of the same physical size. Tech B says dual filament bulb has
Both
Neither
A and Continued question B.... different candlepower ratings. who is right?
B
90
A 6 Cyl. eng. uses 6 fuel injectors in 2 groups of 3 Inj. in parallel. What Resistance be if 3, 9ohm were parallel
36
4
3
12
91
Actuators are also known as
A and C
load devices
sensors
outputs
92
Tech A says that as a sensor resistance increases voltage drop across sensors decreases. Tech B says that the PCM
measures voltage drop across the sensor to determine signal level A
Neither
Both
B
93
A DSO is set to AC coupling this means that
the scope will block AC but read DC
the scope will read AC but block DC
None
the scope will read both
94
Tech A says diodes have one P-N Junction. Tech B says diodes conduct current when they are reverse biased
Neither
Tech B
Tech A
Both
95
an NPN transistors base is made from ____ material
PN type
N type
None
P type
96
Wire repair should be done with
crimp and seal connector
both Red and Blue are right
Soldering
Neither Red or Blue
97
High resistance can cause
All
Dim Lights
relay/solenoid clicking
Slow motor operation
98
Except
B
A
D
C
99
a customer complained every time he turned is vehicle lights on, the left side turn signal dash light remained on
poor ground to larking light or taillight bulb on right side
poor ground to larking light or taillight bulb on left side
open light on left side
open light on right side
100
_______ convert electrical energy into motion
all
stepper motors
solenoids
motors
