Which of the following influences cause a controlled variable to change?
A. a disturbance appears
B. a load demand varies
C. the set point is adjusted
D. all of the above
Answer: D
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Answer the following statement true (T) or false (F)
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In an orthographic projection, all surfaces that are parallel to the plane of projection (the surface of the box) are shown in proportion to their actual size and shape.
Answer the following statement true (T) or false (F)
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Under normal conditions, the human body produces approximately __________ Btus.
A. 200 B. 350 C. 500 D. 1000
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The primary controller in a cascade system receives a feedback signal that represents the condition of the ____ variable.
A. controlled B. manipulated
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