Tankless water heaters:
A. have higher initial costs.
B. have a lower BTU per hour rating.
C. have lower energy input rates.
D. have less complex controls.
Answer: A
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A(n) ___________________ is the basic unit of a PV module.
Fill in the blank(s) with the appropriate word(s).
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The proper travel angle (a push angle) for GTAW welding in the 5G position is _____
a. 0 to 5 degrees b. 10 to 15 degrees c. 15 to 20 degrees d. 20 to 30 degrees
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?What is a typical temperature in the secondary combustion zone of a wood-gasification boiler?
A. ?500° F B. ?1000° F C. ?2000° F D. ?4000° F
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?Varying either water temperature or flow rate are two primary methods of controlling the heat output of hydronic heat emitters.
Answer the following statement true (T) or false (F)
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