Regardless of the method used to sense pressure, all pressure switches activate a set of ____________________. ANSWER: contacts POINTS: 1 REFERENCES: Introduction
Fill in the blank(s) with the appropriate word(s).
contacts
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What is a component that varies or turns on and off the flow of current?
a. Conductor b. Insulator c. Load d. Control device
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Acetylene should never be used:
A) Below 15 psi. B) Below 20 psi. C) Above 20 psi. D) Above 15 psi.
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A method used to detect leaks in green roofs that does not involve the removing of sections of green roof plant materials and their containment is ______________.