Atest is conducted to determine the overall heat transfer coefficient in a shell-and-tube oil-to-water heat exchanger that has 24 tubes of internal diameter 1.2 cm and length 2 m in a single shell. cold water (cp = 4180 j/kg·k) enters the tubes at 20°c at a rate of 3 kg/s and leaves at 55°c. oil (cp = 2150 j/kg·k) flows through the shell and is cooled from 120°c to 45°c. determine the overall heat transfer coefficient ui of this heat exchanger based on the inner surface area of the tubes. 8.31 kw/m2·k

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t