Computer Fundamentals Quiz

What is the purpose of the powertrain control module (PCM) in modern automotive control systems?

• Control the suspension height and adjust engine idle speed

• Measure factors such as vehicle speed and throttle position

• Coordinate engine and transmission operation, process data, maintain communications, and make control decisions

• Operate fuel injectors and ignition timing control

What is the function of input conditioning in automotive computers?

• Controlling output devices by turning them on or off

• Converting analog input signals to digital bits

• Storing program instructions for later reference

• Amplifying voltage signals that are too small for the computer circuitry to handle

What type of memory is read-only memory (ROM) in a computer?

• Memory that can be erased and reprogrammed using a scan tool

• Permanent memory that the computer can only read, not change

• Temporary memory that retains data even when power is shut off

• Memory that stores program instructions for CPU operation

What is the function of high-side drivers in computer output controls?

• Control the power side of the circuit and provide better circuit protection

• Complete the ground path of relay coils inside the computer

• Operate actuators by converting electrical energy into mechanical action

• Switch devices on or off using a relay circuit

What is the purpose of pulse-width modulation (PWM) in controlling outputs?

• Convert analog input signals to digital bits for processing

• Control the amount of on-time for devices by varying the signal

• Switch devices on or off using a digital signal

• Provide a ground path for relay coils inside the computer

What is the function of the central processing unit (CPU) in a computer?

• Control the idle air control (IAC) and electronic throttle control (ETC)

• Measure factors such as vehicle speed and throttle position

• Perform essential mathematical operations and logic decisions

• Store program instructions for CPU operation

What is the role of the Society of Automotive Engineers (SAE) in standardizing computer names?

• Standardize the name as a powertrain control module (PCM)

• Coordinate engine and transmission operation

• Process data and maintain communications

• Set and store diagnostic trouble codes (DTCs)

What is the function of volatile RAM memory in a computer?

• Converts input information into voltage signal combinations

• Stores program instructions for CPU operation

• Can retain its information even when the battery is disconnected

• Is lost whenever the ignition is turned off

What is the purpose of engine mapping in computer programs?

• Determine the optimum output settings for driveability, economy, and emission control

• Control the suspension height and adjust engine idle speed

• Measure factors such as vehicle speed and throttle position

• Operate fuel injectors and ignition timing control

What is the function of the microprocessor in a computer?

• Measure factors such as vehicle speed and throttle position

• Convert analog input signals to digital bits for processing

• Control the idle air control (IAC) and electronic throttle control (ETC)

• Perform essential mathematical operations and logic decisions