Treated sewerage, with a density of 980 kg/m3 is discharged into seawater with a density of 1000 kg/m3 . the discharge pipe has a diameter of 30 cm and is flowing at 4 m/s. calculate the following, stating any assumptions made: (i) calculate the initial specific momentum flux and the initial specific buoyancy flux (ii) calculate lq and lm (iii) what is the length of the zone of flow establishment (zfe) (iv) calculate, clearly stating the assumed flow regime, the centre-line dilution at the following distances from the point of release: (a) 2m (1) (b) 4m (2) (c) 10m (2) (v) calculate the centre-line velocity at the following distances from the point of release: (a) 1 m (1) (b) 3 m

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

The higher the astm grain size number, the finer the gran is. a)-true b)-false