When working in the refrigeration and air-conditioning industry, matter is typically encountered in three states:
A) Solids, liquid, vapors. B) Animal, vegetable, mineral.
C) Fahrenheit, Celsius, Kelvin. D) Chemical, plasma, electrical.
A
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Plot cross sections for each of the profiles listed in the field notes in Figure 12–15. Use a single ANSI D size sheet or two ANSI C size sheets for the layout. In each cross section, plot a 24? wide level road with 4? wide shoulders. The road elevation is 875?. The angle of repose for fill is 1 1/2:1 and 1:1 for cut. Label the road centerline and dimension the road and shoulder widths.
The road should slope 0.04 ft./ft. from the centerline to the edge of road. The shoulder slope is 0.06 ft./ft. Label the slopes on your drawing. Draw the cut and fill beginning at the outside edge of the road shoulder. Label the cut and fill with the appropriate symbol and values. Draw the existing grade as a dashed line in the areas of cut and fill. Use the Earth sectioning symbol in areas of undisturbed Earth. After drawing each cross section, determine the elevation at the intersection of the grade line and cut line. Use these elevations to calculate the earthwork involved between stations 5+00 and 7+00. Use the average end method illustrated in Figure 12–16 to calculate volumes of material in cubic yards and record the values by each cross section. What will be an ideal response?
?Why are the ends of tack welds ground to a featheredge?
A. ?To make it easier to see as you weld across the tack welds. B. ?It prevents the shielding gas from becoming turbulent and losing good gas coverage. C. ?It stops porosity. D. ?To make it easier to have 100% penetration at the ending and beginning of the root weld.
Technician A says that most current Class 8 trucks use power-assisted steering. Technician B says that rack and pinion steering is a recent introduction in trucks. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
A low-velocity fastening system that is used to drive steel pins or threaded studs into masonry and steel is a(n)
_____. a. pneumatic screw nailer b. powder-actuated tool c. air impact wrench d. mini hammer drill