What was the most commonly used refrigerant gas for geothermal pumps for almost one hundred years?

a. chlorofluorocarbons (CFCs) c. carbon dioxide (CO2)
b. hydrogen sulfide (H2S) d. methane (CH4)


A

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What will be an ideal response?

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Application of phosphorus fertilizer usually makes plants more susceptible to diseases

Indicate whether the statement is true or false

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Technician A says that a potentiometer returns a digital signal to the ECM. Technician B says that a potentiometer generally has a two terminal harness connected to it. Which technician is correct?

A) Technician A only B) Technician B only C) Both technicians D) Neither technician

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