Many Gardeners Know That, When a Frost Is Expected, Plants

question 2

Essay

Many gardeners know that, when a frost is expected, plants can be protected by covering them with large plastic tubs. Explain why this is an effective way of protecting plants from frost.

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Definitions:

RTO Timer

A "Retentive Timer On" in programmable logic controllers, maintaining its accumulated value even after the input condition goes false.

Instantaneous Contacts

Contacts in an electrical circuit or relay that make or break a connection immediately upon actuation, without delay.

ACC

Accelerator Control Coaster; this term might be incorrectly listed as it's not standard without context, but in automotive it could refer to Accelerator Control, whereas in computing, ACC often stands for Accumulator, a type of register used in CPUs.