In a remote bulb thermostat, the pressure exerted by the diaphragm on the mechanical linkage will open and close a set of ____________________.
Fill in the blank(s) with the appropriate word(s).
contacts
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The heart of the engine is the ____.
a. block b. crankshaft c. timing belt d. cam shaft
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A semi-conductor that is sensitive to temperature change and is used in solid state thermostats is a ____.
A. mercury contact B. PTC device C. transistor D. thermistor
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How many cubic inches are there in a cubic foot?
a. 1 b. 12 c. 144 d. 1728
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Which of the following is used to supply biocides to steam and water systems?
a. Dual media filter b. Brine tank c. Automatic chemical feed controller d. Boiler blowdown control system
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