Question 1

The standard unit of capacitance is ______.

Accepted Answer

The standard unit of capacitance is the farad (F), named after the English physicist Michael Faraday.

Question 2

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?

Accepted Answer

Technician B is correct because skin oils can indeed cause corrosion and poor electrical contact on metal contacts, which is why it's important to avoid touching them. Technician A is incorrect because static electricity can damage electronic components, especially sensitive ones.

Question 3

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?

Accepted Answer

Semiconductors have the unique property of acting as conductors under certain conditions, such as when voltage is applied, and as insulators under other conditions, such as at low temperatures. This dual behavior is what makes semiconductors so useful in electronic devices.

Question 4

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?

Accepted Answer

Both technicians are correct. Technician A describes sensors that work by modifying a reference voltage, which is a common method for sensors to communicate with a computer. Technician B describes sensors that generate their own voltage signal in response to changes in physical conditions, such as piezoelectric sensors.

Question 5

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?

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 6

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

Accepted Answer

Transistors, which are semiconductor devices used to amplify or switch electronic signals, typically have three legs named base, collector, and emitter. The term "transmitter" is not used to describe a leg of a transistor; it refers to a device that sends out radio or television signals.

Question 7

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

Accepted Answer

The answer of The number of charge/discharge cycles an ultracapacitor...

Question 8

Which of the following is a type of diode?

Accepted Answer

All the options listed (LED, zener, and clamping) are types of diodes, each with its specific application and characteristics. LED stands for Light Emitting Diode, Zener diodes are used for voltage regulation, and clamping circuits often use diodes to limit the voltage to a device.

Question 9

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

Accepted Answer

N-type semiconductors have excess electrons, making them negatively charged. P-type semiconductors have a deficiency of electrons, creating positively charged holes.

Question 10

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

Accepted Answer

The base of a transistor is the terminal that controls the flow of electric current through the transistor, acting as a gate for electrons or holes depending on the type of transistor (NPN or PNP).

Question 11

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?

Accepted Answer

Technician A is correct because applying positive voltage to the base of an NPN transistor allows it to turn on by allowing current to flow from the base to the emitter. Technician B is also correct because when an NPN transistor is turned on, current indeed flows from the collector to the emitter, completing the circuit.

Question 12

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?

Accepted Answer

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

Question 13

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?

Accepted Answer

When a capacitor is charged from a battery, it charges up to the voltage of the battery. Therefore, a 100 microfarad capacitor charged from a 12-volt battery will have 12 volts across its terminals.

Question 14

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?

Accepted Answer

Both statements are correct. A Hall-effect switch indeed uses a semiconductor, permanent magnet, and trigger wheel to measure shaft speed, and an engine coolant temperature sensor is essentially a thermistor, which changes resistance with temperature.

Question 15

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?

Accepted Answer

Both statements are correct. A battery stores energy through chemical reactions, while a capacitor stores energy in an electrostatic field between its plates.

Question 16

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?

Accepted Answer

Technician B is correct because actuators are devices that convert electrical energy into mechanical action, which is their primary function in various systems. Technician A describes sensors rather than actuators.

Question 17

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

Accepted Answer

A clamping diode is used to protect electronic components from voltage spikes, such as those produced when electromagnetic coils are turned off, by clamping the voltage to a safe level.

Question 18

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

Accepted Answer

The coolant temperature sensor (CTS) is not a voltage generating sensor; it typically changes resistance with temperature, which is then interpreted by the vehicle's computer. The other options generate voltage as part of their sensing mechanism.

Question 19

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

Accepted Answer

Technician A is correct because diodes are indeed semiconductors that allow current to flow in one direction only. Technician B is incorrect because diodes do not function as relays; they are used for rectification, signal modulation, and other purposes, but not as relays, which are switches that control the flow of electricity within a circuit.

Question 20

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

Accepted Answer

Transistors are indeed semiconductors, but they do not function as one-way valves; that description is more accurate for diodes.

Quiz 22: Basics of Electronics and Computer Systems