Type PVC conduit and Type RTRC conduit can be used when first surrounded by at least ____ of concrete, followed by a minimum cover of 24 in. (top of conduit to grade).
A. 2 in.
B. 4 in.
C. 8 in.
D. 12 in.
Answer: A
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The force F goes through the origin of the xy-coordinate system and makes an angle ???? with the horizontal, as shown in Figure 12.25. Points A and B are at the coordinates indicated on the figure in units of feet. Calculate the moment of F about points A and B, assigning positive values to counterclockwise moments.
F = 4.2(10)² lbf
???? = 45°
 FIGURE 1.png)
Why are draft inducer fans necessary in today's furnaces?
A) To separate the flue gas from the heat through centrifugal force B) To move the flue gases through the ductwork C) The flue gases cannot make their way through the new heat exchangers on their own. D) To move gas into the burner assembly
Most structural CAD students, having completed a course of study in structural drafting but lacking work experience in the field, typically begin their careers as ____.
A. CAD technicians B. clerks C. checkers D. junior CAD technicians
In a high-rise glass-aluminum curtain wall, the wind pressures increase with height. With increasing wind pressure, the size of mullions must increase with height. However, aesthetic and detailing considerations require the same size of mullions over the entire building's height. How is this requirement generally met?
What will be an ideal response?