Early hydronic systems did not have circulators. Instead, they relied on the ____ of hot water to move water between the boiler and the heat emitters.

a. molecular attraction
b. thermonics
c. hydraulics
d. buoyancy


d. buoyancy

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Within what temperature range does a typical chilled water system operate?

a. 32–38°F (0–3°C) b. 38–42°F (3–6°C) c. 42–55°F (7–13°C) d. 55–72°F (13–22°C)

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The circuit conductors between the service equipment and the final branch circuit overcurrent protection device is a(n) __________.

a. open circuit b. branch circuit c. feeder circuit d. service conductor

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Which term describes the speed of data transmission?

A) Baud rate B) Frequency C) Pulse width modulation D) Oscillator speed

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Technician A says galvanic corrosion occurs when two dissimilar metals come into contact with each other. Technician B says an insulated steel bolt or one with a special coating can be used to hold two aluminum parts together. Who is correct?

A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B

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