What is the purpose of the legend on HVACR electrical diagrams?

A) To provide the operational sequence for the unit
B) To list the symbols used in the diagram and define their use
C) To show all the product variations and trace the history of that model
D) To provide a reference list of the circuits used in the diagram


B

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Sheet metal flashing is bent and formed on the job site.

Answer the following statement true (T) or false (F)

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The vent valve in an evaporative emissions system may be:

A. Opened to allow fresh air through the charcoal canister. B. Closed with the purge valve open while the PCM monitors the fuel tank pressure sensor for vacuum C. Closed to prevent the system from purging. D. Both A and B

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What is the procedure for a quick engine-running test used by most technicians?

What will be an ideal response?

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