Air enters a diffuser with an averaged velocity of 360 m/s at a stagnation pressure and temperature of 340 kpa and 420 k and leaves at a stagnation pressure of 300 kpa with an averaged velocity of 120 m/s and a static pressure of 285 kpa. determine, (i) the static pressure and mach number of the air at inlet; (ii) the diffuser efficiency; (iii)the mach number at exit and the overall entropy increase.

On a average work day more than work place firs are reorted

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.