For an ideal brayton cycle on a cold air-standard basis show that (a) the back work ratio is given by bwr t1/t4 where t1 is the temperature at the compressor inlet and t4 is the temperature at the turbine exit. (b) the temperature at the compressor exit that maximizes the net work developed per unit of mass flowing is given by t2 1t1t321/2 where t1 is the temperature at the compressor inlet and t3 is the temperature at the turbine inlet.

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?