Question 1

What are three purposes of solenoid actuators?

Accepted Answer

Solenoid actuators are used for several things in electronically controlled systems:
- The emission system vapor canister uses a solenoid that opens to allow fumes to be purged from the canister when the engine is warm and above idle speed.
- Fuel injectors are solenoids whose pulse width is controlled by the computer.
- Engine idle is maintained using an idle speed control solenoid.
- Electronic transmissions use shift solenoids and a converter lockup solenoid.
- An engine with an air management system uses solenoids for controlling the direction of flow from the air pump.
- Older EGR vacuum control used two solenoids; one is used for vacuum actuation, and the other for bleeding off vacuum.

Question 2

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. A

Question 3

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

Accepted Answer

A) True 
 B)False  True

Question 4

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

Question 5

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

Accepted Answer

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

Question 6

A ____ is a one-way electrical check valve.

Accepted Answer

A) plenum 
B) diode 
C) byte 
D) thermistor 
A) plenum 
B) diode 
C) byte 
D) thermistor

Question 7

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

Question 8

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 9

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

Accepted Answer

A) True 
 B)False

Question 10

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 11

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

Accepted Answer

A) True 
 B)False

Question 12

A V-type semiconductor is positively charged and can carry electrical current.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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 16

The technology that MOST-Likely blends computers and wireless telecommunications, combining global positioning satellite (GPS) tracking and other wireless communications for automatic roadside assistance and remote diagnostics is:

Accepted Answer

A) telematics 
B) ROM 
C) RAM 
D) DSRC 
A) telematics 
B) ROM 
C) RAM 
D) DSRC

Question 17

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

Accepted Answer

A daisy chain topology, also called seri

Question 18

While having a discussion, Technician A says that in a diode, holes flow in the direction of the arrow, while electrons go against the arrow. Technician B says that holes flow against the arrow, while electrons flow in the direction of the arrow. 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

Question 19

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 20

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.

Exam 45: Electronics and Computer Systems Fundamentals

What are three purposes of solenoid actuators?

All of the following statements are true EXCEPT:

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

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

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

A ____ is a one-way electrical check valve.

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

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

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

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

A V-type semiconductor is positively charged and can carry electrical current.

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

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

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

The technology that MOST-Likely blends computers and wireless telecommunications, combining global positioning satellite (GPS) tracking and other wireless communications for automatic roadside assistance and remote diagnostics is:

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

While having a discussion, Technician A says that in a diode, holes flow in the direction of the arrow, while electrons go against the arrow. Technician B says that holes flow against the arrow, while electrons flow in the direction of the arrow. Who is correct?

All of the following statements are true EXCEPT:

Which of the following statements is LEAST-Likely true?

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 Vehicle on Ground

Undercar Inspection and Service

Introduction to the Engine

Engine Classifications and Types

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

Petroleum Fuels and Alternative Fuel Technologies

Fuel System Fundamentals, Gasoline and Diesel

Fuel System Service

Intake and Exhaust Systemsturbochargers and Superchargers

Emission Control System Fundamentals, Gasoline and Diesel

Emission Control System Service

Electronics and Computer Systems Service

Advanced Emission and On-Board Diagnostics Obd

Diagnosing Engine Performance Problems

Diagnosing Engine Mechanical Problems

Engine Removal and Disassembly

Engine Sealing Gaskets, Fastener Torque

Engine Diagnosis and Service: Cylinder Head and Valve Train

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

Engine Diagnosis and Service: Piston, Piston Rings, Connecting Rod, Engine Balancing

Ordering Parts, Short and Long Blocks, Engine Assembly

Engine Installation, Break-In, and In-Chassis Repairs

Brake Fundamentals

Brake Service

Antilock Brakes, Traction, and Stability Control

Bearings, Seals, and Greases