A 100mm diameter steam pipe is covered by two layers of lagging. the insude layer is 40mm thick with K=0.07w/mk, the outside layer is 25mm thick with k=0.1w/mk. the pipe convey steam at a pressure of 1.7MN/m with 30k superheat. the outside temperature of the lagging is 24°C, if the steam pipe is 20m long, determine the heat loss per hour and the interface temperature of the lagging. neglect the temperature drop accross the steam pipe.​

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?

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false