Asteam power plant operates on a simple rankine cycle between the pressure limits of 3 mpa and 30 kpa. the steam enters th temperature of the steam at the turbine inlet is 400°c, and the mass flow rate of steam through the cycle is 10 kg/s. both the pump and turbine have an isentropic e pump as saturated liquid. the efficiency of 90%. (a) determine the enthalpy of the steam at the pump exit if the compression is isentropic; (b) determine the enthalpy of the steam at the actual turbine exit (c) determine the thermal efficiency of the cycle; (d) calculate the net power output of the power plant (e) show the cycle on a t-s diagram with respect to saturation lines.

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.

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

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)