The roof of the building is flat. It is composed of 2 in. of reinforced concrete on 18-gauge metal decking that weighs 3 psf. A single-ply waterproof sheet of 0.7 psf will be used. The ceiling beneath the roof is unfinished, but allowance for mechanical ducts should be provided. Determine a. The roof dead load b. The roof live load in psf to be applied to column A1

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Burgers vector is generally parallel to the dislocation line. a)-true b)-false