Water at15◦cflows through a pipe with an internal diameter of0.1 m and average internal roughness of 0.000 15 mat a mass flow rate of15 kg/s. the total pipe length is150 m. thepipe also contains one check valve withle/d=55and four 90◦elbows withle/d=30 each. assume the properties for water arerho=1000 kg/m3,μ=0.001 14 pa s, andg=9.81 m/s2. (a) is the flow turbulent? (b) determine the darcy friction factor. (be sure to specify the method you used.) (c) determine the major head loss. (d) determine the total minor head loss. (e) what percentage of the total head loss is the minor head loss? (f) determine the pressure drop through the pipe.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?

Amixture of slurry and mud is to be pumped through a horizontal pipe of diameter 500 mm. the fluid behaves as a bingham plastic with a yield stress of 30 pa and viscosity 0.04 pa.s. describe the effects of the shear stress through a transverse section of the pipe by plotting the variation in shear stress and velocity profile: (i) just before the slurry starts to move (ii) as the slurry flows when the pressure gradient is double that in part (i)