Air enters a turbojet engine at 320 m/s at a rate of 30 kg/s and exits at 570 m/s relative to the aircraft. The thrust developed by the engine is (a) 2.5 kN (b) 5.0 kN (c) 7.5 kN (d) 10 kN (e) 12.5 kN

The Impulse type steam turbine operates at an inlet pressure and temperature of 20 bar and 400 C and a rotation of 4000 rpm. Heat falls isentropically in the first 2 stages of 100 kJ/kg and 125 kJ/kg, respectively. If the ratio U/C1 = 0.45 and the ratio D/L = 10 and the angle of steam entering the vane, 1= 200, calculate (complete with h – s diagram):a). pressure and temperature and specific volume of steam exit level 1 and 2b). tier 1 and 2 diameterc). vapor mass rate

It is possible to generate 3MW of power with a turbine through which 20 kg/s of steam pass under the following conditions: inlet and outlet velocities: 200 m/s and 50 m/s. Input and output enthalpies: 3000 kJ/kg and 2900 kJ/kg.

Consider a turbojet powered airplane flying at a standard altitude of 8.5 km at a velocity of 108  m/s. The turbojet engine itself has inlet and exit areas of 2.8 m2 and 1.2 m2, respectively. The  velocity and pressure of the exhaust gas at the exit are 186 m/s and 75000 Pa, respectively.  Calculate the thrust of the turbojet.