Question 1

Which of the following is a type of diode?
A) LED
B) zener
C) clamping
D) all answers are correct

Accepted Answer

All the options listed are types of diodes: LED (Light Emitting Diode), Zener diode, and clamping diode.

Question 2

The unit of capacitance is ______.
A) coulomb
B) farad
C) gauss
D) hertz

Accepted Answer

The unit of capacitance is the farad (F), named after the English physicist Michael Faraday. The farad is defined as the capacitance of a capacitor that stores one coulomb of charge when one volt is applied across it.

Question 3

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

Accepted Answer

Technician A is correct. Transistors are indeed semiconductors. However, Technician B is incorrect. Transistors are not one-way valves for current flow. Rather, they are used as electronic switches, amplifiers, and other functions that involve the control of current flow.

Question 4

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

Accepted Answer

When positive voltage is applied to the base of an NPN transistor, the base-emitter junction becomes forward biased and allows current to flow. This current causes the transistor to conduct and turn on. When an NPN transistor is turned on, current flows from the collector to the emitter, making Technician B also correct. Therefore, both Technician A and B are correct.

Question 5

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

Accepted Answer

Both technicians are correct. Batteries store energy chemically while capacitors store energy in an electrostatic field between two electrodes.

Question 6

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

Accepted Answer

Both technicians are correct. Some voltage sensors modify a constant voltage signal to provide input to the computer, while other types generate their own voltage signal. It is important for technicians to understand the different types of voltage sensors and how they work in order to properly diagnose and repair electrical systems.

Question 7

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

Accepted Answer

The answer of Technician A says diodes are used to...

Question 8

The two types of semiconductor materials are P-type and ______.
A) B-type
B) K-type
C) N-type
D) Y-type

Accepted Answer

The two types of semiconductor materials are P-type and N-type. P-type semiconductors are created by adding small amounts of impurities that have fewer valence electrons than the semiconductor material (holes are created). N-type semiconductors are created by adding small amounts of impurities that have more valence electrons than the semiconductor material (excess electrons are created).

Question 9

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

Accepted Answer

Technician A's statement about Hall-effect switch is correct. It uses a semiconductor to measure changes in magnetic field created by a permanent magnet and a trigger wheel to measure shaft speed. Technician B's statement about an engine coolant temperature sensor being a thermistor is also correct. A thermistor is a type of temperature sensor that works by changing its resistance based on temperature. Therefore, both technicians are correct.

Question 10

An engine coolant temperature sensor is an example of a(n) ______.
A) potentiometer
B) actuator
C) thermistor
D) Wheatstone bridge

Accepted Answer

An engine coolant temperature sensor is typically a thermistor (a resistor whose resistance changes with temperature) that detects the temperature of the engine coolant and sends this information to the engine control module (ECM) to help regulate the engine's performance. Potentiometers and Wheatstone bridges are different types of electrical circuits, while an actuator is a component that converts electrical energy into mechanical movement (e.g. a motor or solenoid).

Question 11

Some multimeters display RMS readings for ______.
A) AC circuits
B) DC circuits
C) high resistance values
D) low resistance values

Accepted Answer

RMS (Root Mean Square) readings are typically used for AC (alternating current) circuits.

Question 12

Technician A says static electricity can generate more than 25,000 volts and can damage electronic components. Technician B says to avoid touching bare metal contacts because oils from the skin 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

Accepted Answer

Technician A is correct because static electricity can indeed generate high voltages that can damage sensitive electronic components. Technician B is also correct because oils from the skin can lead to corrosion and poor electrical contact over time.

Question 13

Which of the following is associated with voltage frequency?
A) cycle
B) hertz
C) both "cycle" and "hertz"
D) neither "cycle" nor "hertz"

Accepted Answer

Voltage frequency is measured in hertz, which represents cycles per second, so both "cycle" and "hertz" are associated with voltage frequency.

Question 14

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

Accepted Answer

Multiplexing primarily refers to the process of combining multiple signals into one medium or device for transmission, which is commonly used in digital and networking systems, including bus data links, rather than specifically for sending and receiving multiple analog signals.

Question 15

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

Accepted Answer

The answer of Technician A says N-type semiconductors have loose,...

Question 16

Which of the following is NOT a name for a transistor leg?
A) base
B) collector
C) emitter
D) transmitter

Accepted Answer

The names for transistor legs are base, collector, and emitter. Transmitter is not a name for a transistor leg, it is a device that sends radio signals.

Question 17

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

Accepted Answer

Technician A is correct. Diodes are indeed semiconductors, while Technician B's statement is incorrect. Diodes function as a one-way valve for electronic current, rather than as relays.

Question 18

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) .12 volt
D) 12 volts

Accepted Answer

When a capacitor is fully charged by a battery, the voltage across the capacitor equals the voltage of the battery, which is 12 volts in this case.

Question 19

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

Accepted Answer

The coolant temperature sensor (CTS) measures the temperature of the engine coolant to provide information to the engine control module (ECM) which adjusts air/fuel mixture and ignition timing based on coolant temperature. It does not generate voltage. The oxygen sensor, knock sensor, and magnetic pulse generator all generate voltage as part of their function.

Question 20

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

Accepted Answer

Technician B is correct. Actuators are devices that convert electrical signals into mechanical action, such as opening or closing a valve or moving a motor arm. They can include different types, such as solenoids, relays, and motors, but they all share the function of transforming electricity into motion. Technician A's definitions are inaccurate, as variable resistors and thermistors are passive components that do not generate motion, and reference types are not a common category of actuators.

Quiz 22: Basics of Electronics and Computer Systems

Which of the following is a type of diode?

The unit of capacitance is ______.

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

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?

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?

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?

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?

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

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?

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

Some multimeters display RMS readings for ______.

Technician A says static electricity can generate more than 25,000 volts and can damage electronic components. Technician B says to avoid touching bare metal contacts because oils from the skin can cause corrosion and poor electrical contact. Who is correct?

Which of the following is associated with voltage frequency?

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?

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

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

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

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?

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

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?