A piping system is to conduct water at 20oC at a flowrate of 0.1 m3 /s from a location where the pressure is 8 bars to a location where the pressure must be at least 5 bars. The total length of piping is 91.4 m, the installation requires four 90o elbows, and there is no significant change in elevation. What standard-sized Schedule 40 commercial steel pipe should be installed?

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.