Ahelium compressor the relative mach number is mr/s=0.85 at the shroud of the impeller. the inlet stagnation pressure and temperature are 101.325 kpa and 288 k. the mass flow rate is 1.8 kg/s. the hub- to-shroud radius ratio is 0.38, and the inlet flow is axial. determine; (a) the rotational speed of the impeller, (b) the axial velocity, and (c) the inducer shroud diameter, assuming that the inducer is designed for optimum relative flow angle, and that the compressor operates at the design point.

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

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false

Which of the following is the most important advantage of a large field of view? a. allows larger areas to be examined b. relieves eyestrain c. minimizes parallax errors. d. increases precision in proportion to the in- crease in field of view