Lightning That Seems to Occur Without Thunder Is Called

question 89

Multiple Choice

Lightning that seems to occur without thunder is called

• A)heat lightning.
• B)silent lightning.
• C)sheet lightning.
• D)northern lightning.

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Definitions:

TOF Timer

A type of PLC timer that measures the "Time-Off-Fall" or the time it takes for a signal to turn from on to off.

Retentive

Memory or functions in a control system that retain their value or state even after the system is powered down or rebooted.

Nonretentive

In PLC programming, a term referring to memory or data that is not retained after power loss.

Retentive Timer Reset

A function in PLC programming that allows a timer to retain its accumulated value even after a reset condition has been removed or power to the PLC has been cycled.