The frame elements used to span between columns or bents are the _____.
a. spandrels
b. eave struts
c. girts
d. girders
d. girders
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One British thermal unit (Btu) contains ____ calories.
A. 144 B. 212 C. 252 D. 970
The subsequent problems deal with the circuit below
If A = B = C = 0, F is
A. 0 B. 1
Most analog addressable systems operate on a _____.
a. one-conductor circuit b. two-conductor circuit c. three-conductor circuit d. four-conductor circuit
In regards to internally equalized and an externally equalized thermostatic expansion valves identify the incorrect statement?
A. The pressure exerted on the bottom of the diaphragm of an internally equalized expansion valve stems from the evaporator inlet. B. The pressure exerted on the bottom of the diaphragm of an externally equalize expansion valve stems from the evaporator inlet. C. The pressure exerted on the bottom of the diaphragm of an externally equalized expansion valve stems from the evaporator outlet. D. The pressure exerted on top of the diaphragm on either style of valve stems from the remote bulb.