Deck 22: Basics of Electronics and Computer Systems

Question 1

Actuators are electromechanical devices that convert mechanical action into electrical signals.

Answer 1

False

Question 2

Before an analog sensor signal can be processed by a computer, it must first be converted into a digital format.

Answer 2

True

Question 3

The EEPROM located in a computer allows stored information to be electrically changed.

Answer 3

True

Question 4

Multiplexing requires many more wires and additional sensors in the vehicle network.

Question 5

Reprogramming  a computer requires that the computer be removed from the vehicle and sent back to the manufacturer.

Question 6

The instrument panel warning light is called a DTC.

Question 7

An engine coolant temperature sensor is an example of a(n)______.

A)potentiometer
B)actuator
C)thermistor
D)Wheatstone bridge

Question 8

Which of the following is associated with voltage frequency?

A)cycle
B)hertz
C)both A and B
D)neither A nor B

Question 9

The legs of a transistor are the emitter, base, and collector.

Question 10

The clock in a computer is needed to maintain the orderly flow of information throughout the computer's circuitry by transmitting one bit of binary code for each clock pulse.

Question 11

When disconnecting and connecting electronic components, the ignition switch should be turned off.

Question 12

Which of the following is a semiconductor?

A)diode
B)transistor
C)integrated circuit
D)All the answers are correct.

Question 13

Semiconductors are made of ______.

A)gallium
B)silicon
C)copper
D)None of the answers is correct.

Question 14

Twisting together two wires that carry data from one computer module to another increases the possibility that radio waves and magnetic fields can interfere with data transmission.

Question 15

Some common semiconductor materials include silicon and germanium.

Question 16

The two types of semiconductor materials are P-type and ______.

A)B-type
B)K-type
C)N-type
D)Y-type

Question 17

A scan tool is NOT required to retrieve DTCs on late model vehicles.

Question 18

Some multimeters display RMS readings for ______.

A)AC circuits
B)DC circuits
C)high resistance values
D)low resistance values

Question 19

A multiplex wiring system uses bus data links that connect different computers or control modules together.

Question 20

A thermistor is a temperature-variable transistor.

Question 21

The standard unit of capacitance is ______.

A)coulomb
B)farad
C)gauss
D)hertz

Question 22

Technician A says static electricity can't damage electronic components. Technician B says to avoid touching bare metal contacts because skin oil can cause corrosion and poor electrical contact. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 23

Semiconductors are being discussed. Technician A says a semiconductor can be used as a conductor. Technician B says a semiconductor can be used as an insulator. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 24

Technician A says some types of voltage sensors provide input to the computer by modifying or controlling a constant, predetermined voltage signal. Technician B says some types of voltage sensors provide a voltage generating signal. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 25

Technician A says the primary purpose of a multiplexing system is to send and receive multiple analog signals. Technician B says multiplexing uses bus data links. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 26

Which of the following is NOT a name for a transistor leg?

A)base
B)collector
C)emitter
D)transmitter

Question 27

The number of charge/discharge cycles an ultracapacitor can supply to the hybrid traction motor system is ______.

A)100,000
B)1 million
C)20 million
D)infinite

Question 28

Which of the following is a type of diode?

A)LED
B)zener
C)clamping
D)All the answers are correct.

Question 29

Technician A says N-type semiconductors have loose, or excess, electrons. Technician B says P-type semiconductors are positively charged materials. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 30

The voltage applied to the _____ of a transistor controls the flow of electric current through the transistor.

A)base
B)emitter
C)collector
D)cathode

Question 31

Technician A says when positive voltage is applied to the base of an NPN transistor, the transistor is turned on. Technician B says when an NPN transistor is turned on, current flows through the collector and emitter of the transistor. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 32

Technician A says diodes are used to rectify the voltage produced from an AC generator. Technician B says a zener diode protects circuit components from voltage spikes. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 33

If a 100 microfarad capacitor is charged off of a 12 volt battery, how many volts will be present between the terminals of the capacitor?

A)0.0000012 volt
B)0.00012 volt
C)0.12 volt
D)12 volts

Question 34

Technician A says a Hall-effect switch uses a semiconductor, permanent magnet, and trigger wheel to measure shaft speed. Technician B says an engine coolant temperature sensor is basically a thermistor. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 35

Energy storage is being discussed. Technician A says a battery stores energy chemically. Technician B says a capacitor stores energy in an electrostatic field between two electrodes. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 36

Actuators (outputs)are being discussed. Technician A says they are variable resistance/ reference-types, switches, and thermistors. Technician B says they convert electrical current into mechanical action. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 37

A(n)_____is often used to prevent damage to electronic components from the voltage spikes produced when electromagnetic coils are turned off.

A)clamping diode
B)zener diode
C)NPN transistor
D)PNP transistor

Question 38

Which of the following is not a type voltage generating sensor?

A)coolant temperature sensor (CTS)
B)oxygen sensor
C)knock sensor
D)magnetic pulse (PM)generator

Question 39

Technician A says diodes are semiconductors. Technician B says diodes function as electronic circuit relays. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 40

Technician A says transistors are semiconductors. Technician B says transistors function as one-way valves for current flow. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 41

An ____________________ signal is an infinitely variable voltage that can change within a given range.

Question 42

____________________ means that data concerning the effects of the computer's commands are fed back to the computer as an input signal.

Question 43

Beginning with model year 2008, what type of communication protocol is required for diagnostics?

A)Class-A (UART)
B)Class-B (SAE J-1850)
C)Class-C (CAN)
D)Class-D (SAE J-1761)

Question 44

The type of memory that contains specific information about the vehicle and can be removed and reprogrammed or replaced is called ____________________.

Question 45

Technician A says serial data passing through the vehicle's data bus can be monitored with a scan tool. Technician B says serial data travels through the vehicle on a twisted pair of wires-one wire is grounded to the chassis and the other wire is the serial bus transmission wire. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 46

Which of the following requires a high-speed bus?

A)antilock brakes
B)windshield wipers
C)power windows
D)horn

Question 47

Technician A touches a good ground immediately before touching a computer module. Technician B wears a grounding wrist strap before touching the computer electrical connections and computer case. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 48

The _____ changes analog signals produced by sensors into digital signals that the computer can use to process and store data.

A)rectifier
B)inverter
C)CPU (central processing unit)
D)A to D converter

Question 49

Transistor operation is being discussed. Technician A says that when the base of a PNP is connected to ground, the transistor is turned off. Technician B says that when the base of an NPN transistor has a positive voltage applied to it, the transistor is turned on. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 50

Computer memory is being discussed. Technician A says RAM-type memory is erased when the vehicle's battery is disconnected from the computer. Technician B says ROM memory can be erased with a scan tool. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 51

_____ allows control modules to share sensor and output status information without the need for additional sensors or wiring.

A)Multiplexing
B)Transcription
C)Reprogramming
D)Pulse width modulation

Question 52

Pulse width is measured in _____.

A)hertz
B)percentage
C)milliseconds
D)millimeters

Question 53

An electronic device that stores and processes data is a(n)____________________.

Question 54

A(n)____________________ is a material or device that can function as either a conductor or an insulator.

Question 55

The throttle position sensor is a rotary _____.

A)pulse generator
B)hall-effect sensor
C)potentiometer
D)magnetometer

Question 56

Lab scopes are being discussed. Technician A says a lab scope can be used to measure resistance. Technician B says that a lab scope can be used to measure frequency by dividing the length of a cycle into 1. Who is correct?

A)A only
B)B only
C)both A and B
D)neither A nor B

Question 57

Digital signals are typically called ____________________ patterns.

Question 58

When a diode is _____ current cannot flow through it.

A)forward biased
B)reverse biased
C)excited
D)grounded

Question 59

The four basic functions of a computer are input, output, processing, and _____.

A)feedback
B)monitoring
C)attenuation
D)storage

Question 60

A(n)____________________ is the simplest type of semiconductor.

Question 61

Describe the four basic functions of a computer.

Question 62

Identify desirable characteristics of semiconductors.

Question 63

Describe the two ways a microprocessor works with memory.

Question 64

What is an integrated circuit?

Question 65

Terminating ____________________ are connected in parallel across the ends of the main CAN bus wires to eliminate potential voltage spikes or noise on the data bus.

Question 66

On today's vehicles, ____________________ diodes are commonly used to prevent voltage spikes in circuits as magnetic fields collapse.

Question 67

The two main computers in a modern vehicle are the PCM (powertrain control module)and the _____________________.

Question 68

A(n)____________________ module allows for data exchange between two different buses.

Question 69

What is meant by the term "pulse width"?

Question 70

What are the three main types of memory in a computer?

Question 71

The location in the computer memory where a piece of data is stored is called a(n)____________________.

Question 72

What is the major difference between ROM and RAM memory in a microprocessor?

Question 73

Identify two common voltage-generating devices (sensors)in automobiles.

Question 74

Zener diodes are often used to regulate circuit ____________________.

Question 75

What is the difference between an analog signal and a digital signal?

Question 76

A ____________________ is used to amplify and condition the weak voltage signals from Hall-effect type sensors.

Question 77

Variable capacitors are called ____________________.

Question 78

____________________ are sometimes called condensers.

Question 79

A common use for a clamping diode is in the air-conditioning ____________________ coil.

Question 80

A(n)____________________ is a special diode that emits light when current passes through it.