A Vacuum Tester Is Used to Test the Valve Body

question 13

Multiple Choice

A vacuum tester is used to test the valve body of an engine. Tech A states that the valve body should be placed down onto the mat with the transmission case side of the valve body facing up. Tech B states that the transmission case side of the valve body should face down. Who is correct?

• A) Tech A
• B) Tech B
• C) Both A and B
• D) Neither A nor B

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Definitions:

Technician A

A designation used in automotive and other technical fields, typically representing a specific level of certification or expertise in diagnostic or repair skills.

J1939 Message Packets

Data packets defined by the J1939 standard, used in heavy-duty vehicle networks for communicating information such as engine data, diagnostics, and control commands.

Broadcast

means the transmission of information, such as radio or television signals, over a wide area to be received by a broad audience.

Truck Data Bus

A communication system within a truck that allows for the exchange of data between electronic control units (ECUs) and devices.