Question 1

To ____ a computer means to remove the existing programming and overwrite it with new software.

Accepted Answer

"Flash" is a term commonly used in computing when referring to the process of overwriting existing software with new software. "Reset" means to restore the computer to its default settings, "feed" usually refers to inputting data into the computer, and "override" means to take control over a function or process, which is not necessarily the same as overwriting the software.

Question 2

The _______________ is a crystal that electrically vibrates when subjected to current at certain voltage levels.

Accepted Answer

The crystal referred to in the statement is a quartz crystal oscillator, which is commonly used in electronic circuits as a clock generator. It produces a stable frequency signal that synchronizes the operations of various components in the electronic system. The other options - microprocessor, A/D converter, and accumulator - do not relate to the functioning of a crystal oscillator.

Question 3

Technician A says high-side drivers control the ground side of the circuit. Technician B says high-side drivers may be capable of determining circuit faults. Who is correct?

Accepted Answer

High-side drivers control the positive side of the circuit, not the ground side. However, high-side drivers may be capable of detecting circuit faults, such as overvoltage or short circuits. Thus, only Technician B is correct.

Question 4

The ____ is the brain of the computer.

Accepted Answer

The microprocessor is responsible for processing and executing instructions, making it the central processing unit or "brain" of the computer. The A/D converter is responsible for converting analog signals to digital signals, the program is a set of instructions that the microprocessor executes, and the interface circuit connects different parts of the computer together.

Question 5

A ____ is a special tool that connects to the computer connectors to allow the technician to test circuits, sensors, and actuators by providing test points.

Accepted Answer

A breakout box is a special tool that allows a technician to test circuits, sensors, and actuators by providing test points. It connects to the computer connectors and provides access to the wiring in the circuit. This can be useful for diagnosing problems and troubleshooting issues with a vehicle's electronic systems. The other choices, including body computer, circuit breaker, and backprobe, are not tools that are specifically designed for this purpose.

Question 6

A transistor that operates as a relay is the basis of the ____ computer.

Accepted Answer

A transistor that operates as a relay is a basic component of digital computers, which work on binary code. Analog computers use continuous quantities, while interface computers serve as a bridge between different systems.

Question 7

Technician A says open circuit testing of the BCM power supply will indicate if there is high resistance in the circuit. Technician B says that open circuit testing has the potential to mislead to improper diagnostics. Who is correct?

Accepted Answer

Open circuit testing can indeed indicate if there is high resistance in the circuit, as Technician A suggests. However, Technician B is also correct in stating that open circuit testing can sometimes lead to misleading diagnostics because it does not simulate the load conditions under which the circuit operates in normal use.

Question 8

____ memory is the ability of the computer system to store changing values in order to correct operating characteristics.

Accepted Answer

Adaptive memory refers to the ability of a computer system to store changing values to adjust and correct its operating characteristics.

Question 9

All of the following are precautions to prevent static electricity damage when replacing a control module EXCEPT:

Accepted Answer

While wiping the terminals clean before installing the component is a good practice to ensure proper electrical connection, it is not a precaution to prevent static electricity damage. A, B, and D are all precautions to prevent static electricity damage, such as grounding the package, opening the package only when ready to install, and touching a known good ground before opening the package.

Question 10

The operation of a computer is divided into four basic functions: ____.

Accepted Answer

The four basic functions of a computer are Input, Processing, Storage, and Output. Input involves receiving data or instructions from external sources, processing involves manipulating or transforming the data using arithmetic and logical operations, storage involves saving data or instructions for later use, and output involves returning the processed data or results to external devices or users. Option A pertains to arithmetic operations, option B pertains to control structures in programming, and option D pertains to specific functions such as audio and video processing.

Question 11

A(n) ____ is a transistor device that controls the current in the output circuit.

Accepted Answer

A driver is a type of transistor device specifically designed to control the flow of current in the output circuit, making it the correct choice.

Question 12

Using the bidirectional control function of the scan tool fails to make an actuator operate; which of the following could be the cause:

Accepted Answer

If using bidirectional control function fails to make an actuator operate, it could be caused by a faulty scan tool, an open actuator ground circuit, or an open power circuit to the actuator. Therefore, all three options could be the cause.

Question 13

Technician A says the microprocessor commands actuators by output drivers. Technician B says that outputs are never controlled by supplying voltage to the actuator. Who is correct?

Accepted Answer

Technician A is correct in stating that microprocessors command actuators through output drivers. Technician B is incorrect in stating that outputs are never controlled by supplying voltage to the actuator, as some actuators do operate by receiving a specific voltage.

Question 14

____ diagnostic capabilities may include the ability to determine a short circuit or open circuit condition.

Accepted Answer

High-side drivers often have diagnostic capabilities that can detect short circuit or open circuit conditions in the load. Low-side drivers, bipolar transistors, and multiplexers typically do not have this capability.

Question 15

Logic gates are the thousands of field effect transistors (FETs) incorporated into the computer ____.

Accepted Answer

Logic gates are electronic circuits that perform Boolean logic operations. They are made up of multiple transistors that are interconnected to perform the logical function. These logic gates are then integrated into the circuitry of the computer to perform complex operations. While logic gates do play a role in memory, binary code, and programming, they are primarily used in the circuitry of the computer. Therefore, option B is the most appropriate answer.

Question 16

Most computer-controlled actuators are ____ that convert the output commands from the computer into mechanical action.

Accepted Answer

Electromechanical devices are the primary type of actuators used in computer-controlled systems as they convert electrical signals from the computer into mechanical action. Switches, sensors, and valves may be used in conjunction with actuators, but they are not actuators themselves.

Question 17

Technician A says that a PWM actuator cannot be tested with a DMM. Technician B says the PWM actuator may be tested with a lab scope. Who is correct?

Accepted Answer

Technician B is correct. A PWM actuator can be tested with a lab scope by monitoring the duty cycle of the PWM signal. A DMM cannot be used because it only measures DC or AC voltage levels and not the on/off frequency.

Question 18

Technician A says nonvolatile RAM will lose its memory if removed from its power source. Technician B says volatile RAM is not erased when it is disconnected from its power source. Who is correct?

Accepted Answer

Technician A is incorrect because nonvolatile RAM retains its data without a power source. Technician B is incorrect because volatile RAM loses its data when power is disconnected.

Question 19

A(n) ____ is a microprocessor designed to communicate with the BCM.

Accepted Answer

A scan tool is the best choice as it is a device specifically designed to communicate with the BCM and retrieve diagnostic information. Actuators and sensors are components that interact with the BCM, but they are not designed to communicate with it directly. A reader may be used to retrieve trouble codes, but it may not have the same level of functionality as a dedicated scan tool.

Question 20

A(n) ____ is a set of instructions the computer must follow to achieve desired results.

Accepted Answer

A program is a set of instructions that a computer must follow in order to achieve desired results. An analog signal represents a continuous wave, whereas a digital signal represents discrete values (0 or 1) and is the basis of computer language. A circuit diagram is a visual representation of an electrical circuit.

Quiz 8: Introduction to the Body Computerbody Computer System Diagnosis