High- and low-pressure switches are used to ____ the amount of pressure in an air conditioning and refrigeration system.

a. set
b. modulate
c. simulate
d. sense


d. sense

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Where were the ancestors of domestic sheep domesticated?

a. Chile c. Indian subcontinent b. Fertile Crescent d. Eastern Europe

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Explain the difference between a permanent magnet and an electromagnet

What will be an ideal response?

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UNIX and Linux are ____ systems, which allow one user to execute more than one program at a time.

A. server-based B. peer-to-peer C. multitasking D. multiuser

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The ____ of a material provides a uniform method to rate the resistance of heat flow through it.

A. D-value B. R-value C. U-value D. A-value

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