Pure aluminum is poured into a sand mold. the metal level in the pouring basin is 4.5 in. above the metal level in the mold, and the runner is circular with a 0.25 in diameter. the viscosity of the metal is 1.5e-07 lb-s/in2 and its density is 0.098 ib/in3 g 32.2 fsec 2

a) calculate the velocity of the metal when it gets into the mold.

b) calculate the flow rate of the metal when it gets into the mold.

c) calculate the reynolds number (re velocity*diameter*density/viscosity )

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 coarser the grain is. a)-true b)-false

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k