Load moves along girder BCDE. Draw the influence lines for the reactions at supports A and D, the shear and moment at section C, and the moment at D. Point C is located directly above support A.
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Air is heated from an initial temperature of 300 K to a final temperature of 1200 K. Considering the variability of the specific heats, determine the change in specific internal energy and the change in specific enthalpy for the process.
Given: T1 = 300 K; T2 = 1200 K What will be an ideal response?
?Why are fluxing materials used for welding?
A. ?To produce a shinier surface on the weld. B. ?Because some metals are reactive to the atmosphere when heated. C. ?It is a way to help control the heat input to the base plate. D. ?To insure 100% joint penetration on V-grooved joints.
What is a bi-flow thermostatic expansion valve?
What will be an ideal response?
According to the NLGI classification system, low numbers mean the grease is thick.
a. true b. false