Gravity must be taken into consideration when choosing a circulating pump for
A) An open piping system
B) A closed piping system
C) Either an open or closed piping system
D) Gravity does not affect pump selection in either open or closed piping systems
A
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Why is minimizing duct restriction so important?
A) The system cannot operate properly against excessive air restriction. B) Incorrect terminal velocities can cause discomfort. C) Excessive restriction causes excessive noise. D) Excessive restriction can increase operating cost.
The lines that connect the data points in a chart are referred to as ____.
A. legends B. markers C. bars D. trend lines
The most efficient way to save water when irrigating plants is to use an overhead irrigation system
Indicate whether the statement is true or false
Sheet erosion occurs so ____ that a farmer cannot tell it happened
A) slowly B) quickly C) briefly D) promptly