ẍ+ 10ẋ + 50x = 2u̇ + 4u (a) Find the system’s transfer function (b) Plot poles and zeros on the s-plane (c) Provide the system’s time response from the poles of the transfer function (d) Is the system stable? Why or why not? (e) What type of system is it? (undamped, over damped, critically damped, underdamped, etc.?)

What will happen to steel 4340 in a long term consideration upon creep and fatigue? What happen to it microstructure when undergo quenched and tempered?

A company that manufactures turbines of different sizes has been ordered to manufacture 30 large turbines. According to this order, within the next 5 months, the company should produce 2, 3, 5, 8 and 12 turbines respectively. 30,000 man hours of direct labor were used for the production of the first turbine. Based on past experiences from similar productions, the learning rate was determined to be 90%. Accordingly, it is estimated that 27,000 man-hours of direct labour is required for the manufacture of the second turbine. A worker works an average of 150 hours a month. Accordingly, during the next 5 months, estimate the number of workers to be employed for each month in order to grow the order.The distribution of order quantities by month is given in Table 1.

200-mm-square, 10-mm-thick tile has the thermophysical
properties of Pyrex (   0.80) and emerges from a curing process at an initial temperature of
Ti 140C. The backside of the tile is insulated while
the upper surface is exposed to ambient air and surroundings
at 25C.(a) Estimate the time required for the tile to cool to a final,
safe-to-touch temperature of Tf 40C. Use an average
tile surface temperature of T
–
(Ti Tf)/2 to
estimate the average free convection coefficient and
the linearized radiation coefficient. How sensitive is
your estimate to the assumed value for T
–
?
(b) Estimate the required cooling time if ambient air is
blown in parallel flow over the tile with a velocity
of 10 m/s.

A rigid reservoir with 3 m3 volume is connected to a supply line.

Initially the valve is closed and the reservoir contains steam at 800 kPa, and x = 0.8 quality.

The valve is opened and steam is allowed until the final pressure is 2.5 MPa and 250 C.

a- Determine the mass of steam entered to the reservoir.

b- If the pressure is 3.5 MPa and temperature is 350 C at the supply line, evaluate the transferred heat in kJ, and determine the direction of the heat.

A rigid reservoir with 3 m3 volume is connected to a supply line.
Initially the valve is closed and the reservoir contains steam at 800 kPa, and x = 0.8 quality.
The valve is opened and steam is allowed until the final pressure is 2.5 MPa and 250 oC.
a- Determine the mass of steam entered to the reservoir.
b- If the pressure is 3.5 MPa and temperature is 350oC at the supply line, evaluate the
transferred heat in kJ, and determine the direction of the heat.

2. Show that within the linear eddy-viscosity framework “production rate of kinetic energy” in turbulence kinetic energy equation can also be written as Pk = Cµ ε S2. Here, Sij is mean deformation rate tansor and S = Sij Sij.

What does occur in aged pipe? What is the effect of the aging to the head loss in piping system? Express the differences between the new and aged pipe by using the mathematical formulations in addition to physics.

Ethical Dilemma Case Study. Each student must research a real-world example of an ethical dilemma in the field of engineering.

1. Show that within the linear eddy-viscosity framework “production rate of kinetic energy” in turbulence kinetic energy equation can also be written as P_k = C_µε S². Here, S_ij is mean deformation rate tansor and S = S_ij S_ij.

Steam leaves the boiler of a 100 MW Rankine cycle power plant at 400°C and 3.5MPa. The Turbine has an isentropic efficiency of 85% and exhausts at 15 kPa. In the condenser, the water is subcooled to 38°C by lake water at 13°C. The pump isentropic efficiency is 75% Draw and label the T-s diagram (4 points) for this cycle and determine: 1. The cycle’s thermal efficiency (7 points) 2. The mass flow rate of the steam in the boiler (kg/h) (7 points) 3. The back-work ratio (5 points) 4. The minimum required cooling water flow rate if regulations limit the cooling water temperature rise to 10°C (kg/h) (7 points)

name 5 colors of wire that go to a thermostat and name what they control

Steam enters an adiabatic turbine steadily at 3 MPa and 400°C and leaves at 50 kPa. If the isentropic efficiency of the turbine is 66.7%, determine the actual temperature of steam at turbine exit. The mass flow rate of the steam flowing through the turbine is 218 kg/min, determine the power output from the turbine. Plot the T-s diagram.

You are to required to design a steam power cycle that must operate in the parameter space defined below. Final designs should be as close to the desired operating conditions as possible. You are to prepare an engineering report that clearly articulates your design and its analysis and should include, but is not limited to reporting on the following:

Thermodynamic principles and theory that describe the operation of your design

Analysis, including calculations of you design and the final cycle thermal efficiency, work output, required inputs and heat rejection requirements

Complete specification of the state of the working fluid at all points in the cycle

All system figures, T-s and P-v diagrams, correctly and adequately labelled such that all technical information is clearly conveyed

Max cycle thermal efficiency: 50%

Isentropic efficiency of the turbine: 80%

Isentropic efficiency of the pump: 75%

Max operating pressure: 15000kPa

Max quality at turbine exit: 0.95