When a geothermal heat pump system uses antifreeze in the loop, how is antifreeze added to the loop?
A) By pumping the antifreeze in under pressure
B) By pouring the antifreeze in the loop after it is connected
C) By temporarily connecting a purge unit
D) By pouring the antifreeze in the loop before it is connected
C
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Screw jacks must be installed into trenches according to the same horizontal and vertical spacing requirements as those for _____.
a. aluminum hydraulic shores b. aluminum pneumatic shores c. trench boxes d. timber
Which of these sensors does the TP sensor back up if the PCM determines that a failure has occurred?
A) Oxygen sensor B) MAF sensor C) MAP sensor D) Either B or C
A(n) ____ is the horizontal measurement between the exterior face of the wall and the end of the rafter tail.
A. overhang B. valley rafter C. purlin D. fascia
The actual work accomplished in a circuit is a result of the ____ available at the two ends of a conductor.
A. potential B. difference of potential C. electromotive force D. voltage