The two concentrated loads, supported on the combined footing in Figure P5.52, produce a trapezoidal distribution of soil pressure. Construct the shear and moment curves. Label all ordinates of the curves. Sketch the deflected shape.
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Which of the following statements is true for an adiabatic turbine that operates at steady state but is not reversible? Assume “the system” is defined as the fluid inside the turbine.
A. The generation term in the entropy balance is zero, but the change in entropy of the universe is positive. B. The change in entropy of the universe is positive, but the change in entropy of the system could be positive, negative or zero. C. The specific entropy of the fluid leaving the turbine has to be equal to the specific entropy of the fluid entering the turbine, because the turbine is at steady state. D. The efficiency of the turbine can be greater than 1, but only if the entering steam is superheated rather than saturated. E. None of the above is true.
A certain BCD-to-decimal decoder has four input lines and 10 output lines. If four input lines are capable of 16 possible combinations and only 10 output combinations are required, why have four inputs?
A) With three input lines the maximum number of output combinations would be limited to eight. B) With four input lines, the decoder can provide for those rare occasions when input codes greater than 10012 may require decoding. C) With three input lines the maximum number of output combinations would be equal to nine, including zero, and this would be sufficient, but decoders are not manufactured with only three inputs. D) Both A and C