Question 1

A(n) ____ is an electronic or magnetic relay that can perform a desired function.

Accepted Answer

A)  diode 
B)  sensor 
C)  actuator 
D)  monitor 
A)  diode 
B)  sensor 
C)  actuator 
D)  monitor C

Question 2

Briefly discuss the following network topologies: daisy chain, star, bus, and ring.

Accepted Answer

A daisy chain topology, also called series or linear, is one of the earliest wiring methods. It is wired in series like Christmas tree lights. 
Star, or common splice, is the most popular topology for home LANs. All modules on the network are connected to a single point with a separate wire from each module. Modules communicate with one another through a hub, router, or switch. The star configuration allows for easy addition of modules to the network by plugging a device into the central processor. A fault in a star system will result in failure of only the affected component. 
Bus topology uses less cabling than star topology. A single main run bus cable is connected to all of the modules. Terminators provide resistance that absorbs frames once they have been transmitted so they are not received again. The terminators can be at each end of the bus or can be inside two of the nodes. 
Ring, or loop, topologies are wired in series, but messages can travel either way in the network so a single break will not open the circuit.

Question 3

While having a discussion, Technician A says that reverse bias diodes allow current to flow. Technician B says that forward bias diodes allow current to flow. Who is correct?

Accepted Answer

A)  A only 
B)  B only 
C)  Both A and B 
D)  Neither A nor B 
A)  A only 
B)  B only 
C)  Both A and B 
D)  Neither A nor B B

Question 4

A(n) ____________________ diode is one whose crystals are more heavily doped during manufacturing.

Accepted Answer

The answer of A(n) ____________________ diode is one whose crystals...

Question 5

All of the following statements are true EXCEPT:

Accepted Answer

A)  a knock sensor has a piezoelectric crystal sensing element that senses vibration and creates a voltage signal of 100 to 200 mV. 
B)  an oxygen (O2) sensor is a variable DC voltage generator. 
C)  pulse generators are signal generators. 
D)  in a variable AC voltage generator, a magnetic pickup generates an AC analog signal with a positive and negative sine wave. 
A)  a knock sensor has a piezoelectric crystal sensing element that senses vibration and creates a voltage signal of 100 to 200 mV. 
B)  an oxygen (O2) sensor is a variable DC voltage generator. 
C)  pulse generators are signal generators. 
D)  in a variable AC voltage generator, a magnetic pickup generates an AC analog signal with a positive and negative sine wave.

Question 6

List five types of sensors.

Accepted Answer

There are five different types of sensor

Question 7

The ____________________ is the calculating and decision-making chip in the computer.

Accepted Answer

The answer of The ____________________ is the calculating and decision-making...

Question 8

The part that is MOST-Likely used to vary the fuel system to operate at the correct air-fuel ratio in closed loop is:

Accepted Answer

A)  thermistor 
B)  adaptive fuel trim 
C)  resonator 
D)  microprocessor 
A)  thermistor 
B)  adaptive fuel trim 
C)  resonator 
D)  microprocessor

Question 9

N-type semiconductors have five or more electrons in their outer valence ring.

Accepted Answer

A) True 
 B)False

Question 10

Keep-alive memory means the computer maintains power to RAM when the ignition switch is off.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following statements is LEAST-Likely true?

Accepted Answer

A)  An integrated circuit (I
C)  is a complete miniaturized electric circuit. 
B)  An integrated circuit consumes considerably more electrical current than a large-scale circuit. 
C)  As many as 30,000 transistors can be placed on a chip that is only 1/4" square. 
D)  ICs are limited in the amount of electrical current they can carry. 
A)  An integrated circuit (I
C)  is a complete miniaturized electric circuit. 
B)  An integrated circuit consumes considerably more electrical current than a large-scale circuit. 
C)  As many as 30,000 transistors can be placed on a chip that is only 1/4" square. 
D)  ICs are limited in the amount of electrical current they can carry.

Question 12

What are three purposes of solenoid actuators?

Accepted Answer

Solenoid actuators are used for several

Question 13

Random access memory (RAM) is permanently programmed information available to the microprocessor.

Accepted Answer

A) True 
 B)False

Question 14

All of the following statements are true EXCEPT:

Accepted Answer

A)  computers in most North American vehicles use ground-side switching with current-limiting devices. 
B)  most European and some Japanese manufacturers use power-side switching. 
C)  power-side switching minimizes galvanic corrosion because electrons move in their normal direction. 
D)  automotive computer systems since the mid-eighties have operated on 10 volts. 
A)  computers in most North American vehicles use ground-side switching with current-limiting devices. 
B)  most European and some Japanese manufacturers use power-side switching. 
C)  power-side switching minimizes galvanic corrosion because electrons move in their normal direction. 
D)  automotive computer systems since the mid-eighties have operated on 10 volts.

Question 15

Actuators are the devices that act upon processed signals received from the computer.

Accepted Answer

A) True 
 B)False

Question 16

What are the four functions of a computer?

Accepted Answer

A computer has four functions:

Question 17

A(n) ____________________ code is one that only occurs occasionally for a short time and is not present in the system at the time of the fault test.

Accepted Answer

The answer of A(n) ____________________ code is one that only...

Question 18

A(n) ____________________ is a variable resistor made from semiconductor material.

Accepted Answer

The answer of A(n) ____________________ is a variable resistor made...

Question 19

What is the purpose of the following semiconductor crystals in a transistor: emitter, base, and collector?

Accepted Answer

The base is always in between the emitte

Question 20

Which of the following is LEAST-Likely one of the three main parts of an automotive computer system?

Accepted Answer

A)  Plenum 
B)  Actuators 
C)  Sensors 
D)  Computer 
A)  Plenum 
B)  Actuators 
C)  Sensors 
D)  Computer

Exam 45: Electronics and Computer Systems Fundamentals

A(n) ____ is an electronic or magnetic relay that can perform a desired function.

Briefly discuss the following network topologies: daisy chain, star, bus, and ring.

While having a discussion, Technician A says that reverse bias diodes allow current to flow. Technician B says that forward bias diodes allow current to flow. Who is correct?

A(n) ____________________ diode is one whose crystals are more heavily doped during manufacturing.

All of the following statements are true EXCEPT:

List five types of sensors.

The ____________________ is the calculating and decision-making chip in the computer.

The part that is MOST-Likely used to vary the fuel system to operate at the correct air-fuel ratio in closed loop is:

N-type semiconductors have five or more electrons in their outer valence ring.

Keep-alive memory means the computer maintains power to RAM when the ignition switch is off.

Which of the following statements is LEAST-Likely true?

What are three purposes of solenoid actuators?

Random access memory (RAM) is permanently programmed information available to the microprocessor.

All of the following statements are true EXCEPT:

Actuators are the devices that act upon processed signals received from the computer.

What are the four functions of a computer?

A(n) ____________________ code is one that only occurs occasionally for a short time and is not present in the system at the time of the fault test.

A(n) ____________________ is a variable resistor made from semiconductor material.

What is the purpose of the following semiconductor crystals in a transistor: emitter, base, and collector?

Which of the following is LEAST-Likely one of the three main parts of an automotive computer system?

Introduction to the Automobile

Automotive Careers and Technician Certification

Shop Safety

Shop Management, Service Records, and Parts

Locating Service Information and Specifications

Measuring Tools and Systems

Hardware, Fasteners, Drills, and Thread Repair

Shop Tools

General Shop Equipment

Cleaning Equipment and Methods

Lifting Equipment and Air Compressors

Engine Lubrication

Underhood and Body Inspection Car on Ground

Undercar Inspection and Service

Introduction to the Engine

Engine Classifications and Advanced Transportation Technologies

Engine Size and Measurements

Engine Upper End

Engine Lower End and Lubrication System Theory

Cooling System Theory

Cooling System Service

Automotive Belts

Automotive Hoses

Automotive Plumbing: Tubing and Pipe

Basic Electrical System Theory and Repairs

Battery Fundamentals

Battery Service

Starting System Fundamentals

Starting System Service

Charging System Fundamentals

Charging System Service

Lighting and Wiring Fundamentals

Lighting and Wiring Service

Safety, Security, Comfort Systems, and Electrical Accessories

Heating and Air Conditioning Fundamentals

Heating and Air Conditioning Service

Ignition System Fundamentals

Ignition System Service

Fuels and Alternative Fuels

Fuel System Fundamentals

Fuel System Service

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Emission Control System Fundamentals

Emission Control System Service

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Advanced Emissions and On-Board Diagnostics Odb

Diagnosing Engine Performance Problems

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Engine Removal and Disassembly

Engine Sealing, Gaskets, Fastener Torque

Engine Diagnosis and Service: Cylinder Head and Valvetrain

Engine Diagnosis and Service: Block, Crankshaft, Bearings, and Lubrication System

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Engine Installation, Break In, and In-Chassis Repairs

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Brakes Service

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