Air at a static temperature of 20oC and a static pressure of 101 kPa flows through the inlet of aconvergent-divergent nozzle at the rate of 0.5 kg/s. The exit area of the nozzle is 1.355 times theinlet area. If the air leaves the nozzle at a static temperature of 20oC and a stagnation temperatureof 30oC, calculate the inlet and exit Mach numbers, the increase in entropy (if any) between theinlet and the outlet, the area at which the shock (if any) occurs and the stagnation pressure at theexit.

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation