Shipping Conferences Refer to ____

question 68

Multiple Choice

Shipping conferences refer to ____.

• A)annual meetings of large international shippers
• B)the same thing as shippers' associations
• C)cartels of ocean vessel operators operating between certain trade areas
• D)water ports that are located in the same geographic area

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Definitions:

Characteristic Impedance

A measure of how a conductor appears (regardless of length) to a high-frequency signal; for instance, a truck J1939 data backbone has a characteristic of 120 ohms. It cannot be measured with an ohmmeter.

J1939 Data Bus

A communication protocol based on CAN (Controller Area Network) used for the electronic control system of heavy-duty vehicles to transmit data and control information among various vehicle components.

Field Effect Transistor (FET)

An electronic relay switch of which there are two types: N-channel and P-channel. A gate (terminal) is used to alter channel status. Channel allows current to flow or not to flow from the source terminal to the drain terminal. Used on many current truck electronic systems because of their ability to allow a very small current to control a high current.

Gate Channel Resistance

The resistance encountered in the channel of a gate in semiconductor devices, affecting electron flow and the device’s electrical characteristics.