Water flowing in a pipe at a rate of 30 kg/s enters a valve at state 1. The temperature and pressure at state 1 are 300 Celsius and 10 MPa, respectively. The water leaves the valve at state 2 and immediately enters a flash chamber operating at 500 kPa. The vapor leaves the flash chamber at state 3 and the liquid leaves at state 4. Determine the following: a. The enthalpy at state 1
b. The quality at state 2
c. The temperature at state 2
e. The mass flow rate of liquid leaving the chamber

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 ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1