The ________ is a group of materials that work together to keep the indoor environment separated from the outdoor environment
A) Pressure boundary B) House as a system
C) Heat recovery system D) Building envelope
D
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The rule for segmental arch construction is that the minimum rise should always be _____ the width of the opening or span, if the arch is to be self supporting and not on a form.
A. equal to one-eighth B. more than one-fourth C. up to one-half D. no more than one-sixteenth
A feeder circuit with no motor load has a continuous load of 10A and a noncontinuous load of 10A. The feeder overcurrent protective device should be sized at _____.
a. 12.5A b. 20A c. 22.5A d. 27.25A
The term MOST-Likely used to describe a loss of voltage caused when current flows through a resistance is:
A. impedance B. voltage drop C. probe D. short circuit
A common practice in condensing units is to use a contactor with only one set of contacts opening only one side of the power to the unit. This is to ____.
A. reduce the cost of the contactor B. make it easier to wire the unit C. teach the service technician not to put hands in the unit with the power on D. provide off-cycle heat to the compressor