In a gas turbine unit, the gases flow through the turbine at 12 kg/s and the specific work done by the turbine is 750 kJ/kg. The enthalpies of gases at the inlet and outlet are 1280 kJ/kg and 450 kJ/kg respectively, and the velocity of gases at the inlet and outlet are 45 m/s and 120 m/s, respectively. Calculate: (a) The rate at which heat is rejected to the turbine. (b) The area of the inlet of the pipe given that the specific volume of the gases at the inlet is 0.4 m3/kg.

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

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables