At the inlet to the ombustor of a supersonic ramjet(SCRAMjet), the flow Mach number is supersonic. For the fuel-air ratio(by mass) of 0.03 and a combustor exit temperature of 4800 degree R, calculate the inlet Mach number above which the flow will be unchoked. Assume one dimensional frictionless flow with lamda = 1.4, with the heat release per slug of fuel equal to 4.5x10^8 ft-lb. Also calculate change in entropy for the process

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.