Apin fin of uniform, cross-sectional area is fabricated of an aluminum alloy (k 160 w/m k). the fin diameter is d 4 mm, and the fin is exposed to convective conditions characterized by h 220 w/m2 k. it is reported that the fin efficiency is f 0.65. determine the fin length l and the fin effectiveness f . account for tip convection.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

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