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1.A steady-state, well-insulated turbine operates in two stages in series using steam. the first stage has an efficiency of 85% and the second stage 90%. Steam enters the first stage at 400 C and 4 MPa and exits at 1.5 MPa. The steam then enters the second stage and exits at 100 kPa. Show the process in a T-S diagram. Also determine the work developed by each stage.
2.Nozzle
A steam is supplied to the nozzle at 0.8 MPa, 400oC and a velocity of 8 m/s. A steam then leaves at 0.2 MPa, 300oC and losing heat at the rate of 20 kW. For the nozzle that has an inlet diameter of 32 cm, determine:
(i) The exit velocity of the steam.
(ii) The volume flow rate of the steam at the nozzle exit.
Determine the uniform flow depth in a trapezoidal channel with a bottom width of 8 ft and side slopes of 1 vertical to 2 horizontal. The discharge is 100 ft3/s. Manning roughness factor is 0.015 and the channel bottom slope is 0.004.
Compute the motor size required to pump 28.3 cms through a 3,050 m long, 3.66 m diameter pipeline to an upper reservoir 610 m above the lower reservoir. Use a friction facter of 0.02 and a pump efficiency of 80 percent.
determine the highest real root of f(x)= 0.95x^3 - 5.9x^2 +10.9x-6: (a)graphically. (b) using the newton raphson method(three iterations, xi= 3.5). (c) using the secant method(three iterations, xi-1= 2.5 and xi= 3.5).
an operator at a wastewater treatment plant decided to increase the SRT from 5 days to 10 days. How will this change affect: a) the oxygen requirement b) MLVSS in the aeration tank.
a sewage treatment works stw with 4 single-stage trickling filters has become organically overloaded due to the
A 1.20-m thick strata of sand has a void ratio of 1.81. A contractor passes a vibratory roller over this extra strata, which densifies it and reduces its void ratio to 1.23. Compute its new thickness.
Assume that at one end of the column a clockwise moment of 100 k-ft is present, and that at the other end of the column a counter-clockwise moment of 25 k-ft is present. you may assume that k= 1.
If the specific surface energy for aluminum oxide is 0.90 J/m^2, using data contained, compute the criteical stress required for the propagation of an internal crack of length 0.40 mm.
Wheeling-Pittsburg steel is investigating whether it should replace some of its basic oxygen furnace equipment now or wait to do it later. The cost later (3 years from now) is estimated to be 1,700,000.
two wooden members of uniform rectangular cross section of sides a = 100 mm and b = 60 mm are joined by a simple glued joint as shown. knowing that the ultimate stress of the joint are 1.26 MPa in tension and 1.50 MPA in shear and that P= 6kN
Assuming we are still in a world with only discrete investment choice, i.e., option A, option B, etc., describe a realistic investment problem where none of the environments discussed apply without some reframing.
you have been selected to assist the structural engineer for a bridge replacement project. your task is to design the
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