The electrical switching in an electronic thermostat is often done by:

A) Batteries. B) A mercury bulb. C) Small relays. D) Resistors.


C

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Pump symbols are defined on the _____ page.

a. P&ID b. mechanical symbology c. spool drawing d. instrument symbology

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Structure R contains neurons that are involved with



A) initiating voluntary motor impulses.
B) abstract thinking.
C) the control of autonomic functions.
D) emotions.
E) the interpretation of speech.

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If an air-cooled refrigeration or air-conditioning system must operate at low outdoor temperatures, a low ambient control is used to ________________________________________.

Fill in the blank(s) with the appropriate word(s).

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A 25 lb. is set 5' from the fulcrum. How far would a 10 lb. weight need to be set from the fulcrum to create a balance?

A. 12.5' B. 13.5' C. 14' D. 22'

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