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

Is lost whenever the ignition is turned off

Converts input information into voltage signal combinations

Can retain its information even when the battery is disconnected

What is the purpose of engine mapping in computer programs?

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

Why is it important to route spark plug wires correctly in a vehicle?

To prevent high-voltage interference with other circuits or components

To reduce the emission of harmful gases

What is the purpose of the dwell section in an ignition system?

To charge the ignition coil from the transistor-on point to the transistor-off point

To display the firing lines of all cylinders

To measure the voltage required to jump the gap between the rotor and the distributor cap insert

To indicate the length of time for which the spark lasts

What does a downward-sloping spark line on an ignition scope pattern indicate?

High secondary ignition system resistance or a fouled spark plug

A mechanical engine problem or a lean air-fuel mixture

Excessive wearing of all spark plugs

What is the purpose of distributor indexing in some engines?

To properly initiate the fuel-injection sequence

To regulate the engine cooling system

To control the air-fuel mixture ratio

What does ignition timing refer to?

When the spark plug fires in relation to piston position

When the air-fuel mixture is compressed in the cylinder

When the exhaust valve opens during the engine cycle

When the fuel is injected into the combustion chamber

Why is it important to visually inspect spark plug wires for cuts or defective insulation?

Faulty insulation can cause hard starting or no starting in damp conditions

To test the pickup coils using an ohmmeter

To measure the resistance of the primary winding inside the coil

To check for engine RPM while cranking the engine

What is the function of a Hall effect sensor in the ignition system?

Produces an on and off signal when exposed to a magnetic field

Creates a spark to jump the gap at atmospheric pressure

Generates a minimum of 0.25 volt AC during cranking

Checks for proper voltage output in the ignition system

What is the purpose of using a spark tester in the ignition system diagnosis?

To check for a blue spark at the spark tester

To measure the resistance of the primary winding inside the coil

To test the pickup coils using an ohmmeter

To check for engine RPM while cranking the engine

What is the first step to check for secondary voltage out of the ignition coil or to the spark plugs in a no-start condition?

Disconnect any spark plug wire from a spark plug

Check the resistance of the primary winding inside the coil

Test the pickup coils using an ohmmeter

Remove the coil wire from the center of the distributor cap

What is the main difference between Grade #1 and Grade #2 diesel fuel?

Grade #1 has higher boiling point

Grade #1 has higher BTU content

Grade #1 is suitable for low-temperature operation

How does the Hall-effect switch function in the ignition system?

By applying a magnetic field to a semiconductor material

By controlling the engine fuel injection system

By detecting abnormal combustion in the engine

By using a rotating trigger wheel and a stationary sensor

What is the purpose of the primary ignition circuit in the ignition coil?

To carry the current when the secondary circuit is off

To regulate the engine coolant flow

To control the engine exhaust emissions

To adjust the engine air intake

How does the ignition coil create a high-voltage spark?

By using electromagnetic induction to increase the voltage

By applying battery voltage directly to the spark plugs

By controlling the fuel injection timing

By adjusting the engine valve timing

What is the main difference between waste-spark and coil-on-plug ignition systems?

The number of ignition coils used

The location of the ignition control module

The method of distributing the high-voltage spark

What is the function of the distributor in the ignition system?

To distribute the high-voltage spark from the ignition coil to the spark plugs

To control the vehicle's lighting system

To regulate the engine oil pressure

To adjust the engine compression ratio

What is the purpose of a knock sensor in the engine?

To detect abnormal combustion and prevent engine damage

To regulate the engine idle speed

To adjust the fuel injection timing

To control the transmission shifting

What is the role of the ion-sensing ignition system in the engine?

To detect abnormal combustion and adjust the ignition timing

To control the vehicle's suspension

To regulate the engine cooling system

What is the primary purpose of the waste-spark ignition system?

To reduce emissions from the vehicle

To fire the spark plugs for two cylinders at the same time

To provide a backup ignition system in case of failure

What is the function of the crankshaft position sensor in the ignition system?

To trigger the electronic module that switches the primary ground circuit of the ignition coil

To control the air-fuel mixture ratio

To monitor the engine oil level

What is the purpose of the ignition system in a vehicle?

To create and distribute a high voltage spark to ignite the air-fuel mixture

To distribute fuel to the engine cylinders

To regulate the engine temperature

To control the vehicle's braking system

What is the purpose of adding ethanol to gasoline?

To change the color of the gasoline

What is the ideal air-fuel ratio for

gasoline combustion called? Combustion air-fuel ratio

What does Reid vapor pressure (RVP) measure?

The pressure of the vapor above the fuel at 100°F

The octane rating of the gasoline

What is the purpose of the driveability index (DI) in gasoline?

To predict cold-weather driveability

To measure the color of gasoline

To calculate the Reid vapor pressure

How is gasoline transported to regional storage facilities?

By railway tank car or by pipeline

What is the chemical composition of gasoline?

Pentane, Hexane, Heptane, Octane

Octane, Nonane, Decane, Undecane

Hexane, Heptane, Octane, Nonane

Methane, Ethane, Propane, Butane

A mixture of various hydrocarbons refined from crude petroleum oil for use as a fuel in engines

Computer Fundamentals Quiz

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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)

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Computer Fundamentals Quiz

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

What is the function of input conditioning in automotive computers?

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

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

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

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

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

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

What is the purpose of engine mapping in computer programs?

What is the function of the microprocessor in a computer?

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