Question 1

Which of the following could be referred to a the 'brain' of the processing cycle in a computer system?

Accepted Answer

The central processing unit (CPU) is often referred to as the 'brain' of the computer because it processes instructions, performs calculations, and manages the flow of information through a computer system, making it the primary component responsible for executing programs and operations.

Question 2

Technician A says that a current truck equipped with a J1939 data bus,may be capable of communicating with a J1587/1708 bus.Technician B says that a J1939 neural network is a parallel data bus.Who is correct?

Accepted Answer

Technician A is correct because many modern trucks are equipped with devices or gateways that allow communication between different types of data buses, such as J1939 and J1587/1708. This interoperability is important for diagnostic and monitoring purposes. Technician B is incorrect because J1939 is not a neural network; it is a high-speed serial data network used for communication among components in heavy-duty vehicles.

Question 3

How many counts of resolution can be displayed by a DMM with a resolution of 3 1/2 digits?

Accepted Answer

A 3 1/2 digit DMM can display up to 1999 counts, as the half digit represents the leading digit, which can only be 0 or 1, allowing for a range from 0 to 1999.

Question 4

What is the ISO wiring color code for continuous power?

Accepted Answer

The ISO wiring color code for continuous power is red.

Question 5

Technician A says that a generic HH-EST can be used in place of a PC to read a truck data bus.Technician B says that a disadvantage of generic HH-ESTs is that not all OEMs support their software systems.Who is correct?

Accepted Answer

Technician A is correct because a generic Hand-Held Electronic Service Tool (HH-EST) can indeed be used to read data from a truck's data bus, serving as an alternative to using a PC. Technician B is also correct because one of the disadvantages of using generic HH-ESTs is that they may not be compatible with all Original Equipment Manufacturer (OEM) software systems, limiting their functionality with certain vehicles.

Question 6

On a standard desktop PC,which of the following would be known as an input device?

Accepted Answer

A mouse is an input device used to interact with and provide data to the computer.

Question 7

What is an RS-232 port on a generic HH-EST used for?

Accepted Answer

The RS-232 port on a generic Hand-Held Electronic System Tester (HH-EST) is versatile and can be used for multiple purposes including printer output, terminal output, and port setup, making all of the options correct.

Question 8

How many total numeric digits can be displayed by a DMM said to have a 3 1/2 digit resolution?

Accepted Answer

A 3 1/2 digit resolution DMM can display up to 4 numeric digits, where the first three digits can be any number from 0 to 9, and the last digit is either 0 or 1, effectively allowing numbers up to 1999 to be displayed.

Question 9

What is the main circuit board of a computer often known as?

Accepted Answer

The main circuit board of a computer is known as the motherboard. It houses the CPU, memory, and connectors for input and output devices, serving as the central hub for all computer components.

Question 10

Technician A says that most generic ESTs are capable of displaying active and historic codes.Technician B says that a password is required before active codes can be erased from an ECU or ECM.Who is correct?

Accepted Answer

The answer of Technician A says that most generic ESTs...

Question 11

Technician A says that a DMM rated at 4 1/2 counts of resolution displays only four digits.Technician B says that in DMMs rated with 3 1/2 counts of resolution,the half count can only be displayed as a 1 or zero.Who is correct?

Accepted Answer

Technician B is correct because in a DMM with 3 1/2 counts of resolution, the half digit can only display a 0 or 1. Technician A is incorrect because a 4 1/2 digit DMM can display four full digits plus a half digit, not just four digits.

Question 12

At what range can Wingman/VORAD detect a deer in the middle of a road in heavy fog?

Accepted Answer

Wingman/VORAD systems are designed for collision mitigation and lane departure warnings for vehicles, focusing on detecting large objects like other vehicles. They are not designed to detect small objects such as people or animals, especially in challenging visibility conditions like heavy fog.

Question 13

On a standard desktop PC,which of the following would be known as an output device?

Accepted Answer

A printer is an output device because it outputs information from the computer, turning digital documents into physical printouts.

Question 14

Technician A says that when using DMM probes should be inserted through the rubber insulator of weatherproof connectors.Technician B says that a correct method of connecting a DMM into an active electronic circuit is to use a breakout box or Tee.Who is correct?

Accepted Answer

Technician B is correct because using a breakout box or Tee connector is a safe and effective method to connect a Digital Multimeter (DMM) into an active electronic circuit without causing damage or creating a short circuit. Inserting probes through the rubber insulator of weatherproof connectors, as suggested by Technician A, can damage the connector and compromise its weatherproofing capabilities.

Question 15

Which of type of connector is used as the DLC on any post-2014 truck in North America?

Accepted Answer

The correct types of connectors used as the Data Link Connector (DLC) on any post-2014 truck in North America are either Deutsch or J1962 connectors. These connectors are standardized for vehicle diagnostics and data sharing.

Question 16

If you have accessed an OEM data hub,which of the following MUST be true?

Accepted Answer

Accessing an OEM data hub requires an online connection to retrieve or interact with the data, which is typically hosted on a server or cloud-based platform. The other options are specific to certain types of data or methods of connection that are not universally required to access an OEM data hub.

Question 17

Technician A says that most PCs designated for use in communicating with truck data buses use the Windows GUI.Technician B says that most HH-ESTs are unable to be used to reprogram ECUs with proprietary data.Who is correct?

Accepted Answer

Technician A is correct because the Windows Graphical User Interface (GUI) is commonly used in PCs for truck data bus communication due to its widespread availability and compatibility with various software tools. Technician B is also correct because most Hand-Held Engine Service Tools (HH-ESTs) are limited in their ability to reprogram Electronic Control Units (ECUs) with proprietary data, as this often requires more advanced, manufacturer-specific tools or software.

Question 18

Technician A says that a truck chassis data bus can be accessed using a black 9-pin data connector.Technician B says that a truck chassis data bus can be accessed using a green 9-pin data connector.Who is correct?

Accepted Answer

Both Technician A and Technician B are correct. Trucks can have different types of data connectors for accessing the chassis data bus, including both black and green 9-pin data connectors. These connectors are used for diagnostic purposes and can vary by manufacturer and model year.

Question 19

Technician A says that most generic HH-ESTs are capable of proprietary data programming.Technician B says that a real advantage of generic HH-ESTs is their portability that permits recording snapshot data on road tests.Who is correct?

Accepted Answer

Technician B is correct because one of the key advantages of generic Hand-Held Electronic Service Tools (HH-ESTs) is indeed their portability, which allows for the recording of snapshot data during road tests. Technician A is incorrect because most generic HH-ESTs are not capable of proprietary data programming; this function is typically reserved for manufacturer-specific tools.

Question 20

What is the ISO wiring color code for general ground wires?

Accepted Answer

The answer of What is the ISO wiring color code...

Quiz 11: Diagnosis and Repair of Electronic Circuits