If the steam is now expanded from 10 bar and 500 degree Celsius to 0.04 bar with isentropic efficiency of 90%, in what respects does the ideal gas assumption become invalid. Compare the ideal gas and steam table results for the exit temperature and the work output

Assume the average home requires an electrical power of 1.2kW, an average life expectancy of 75 years, and only power from nuclear energy. For such a homeowner, what would be the lifetime generation of vitrified high level waste (HLW) in kg and liters (assuming reprocessing and recycling of U and Pu). Recall from our notes and handouts for chapter 7, the vitrified waste containers in France hold the HLW equivalent of 1.5 fuel recycled assemblies with an energy production of 1 TWh (1E+12 Wh). Compare this to some common size object such as a soda can for ease of conversation. Of course, this ignores other energy needs/requirements for such a person. Explain. How might nuclear power be used to meet these needs also?

how these Die-tools are traditionally manufactured.

6 types of Traditional manufacturing methods relevant to die manufacture e.g laser jet cutting, water jet cutting, milling, lathing etc? (should cover following information and no more than 300 words for each method) Your discussion in this section should include the following information regarding.

1. how method creates die/part and what materials can it use

2. what are the tolerances and finish of die/part

3. what are the material properties/strength of the final product

4. how long does it take to produce the desired die/part and approx cost.

5. Advantages and disadvantages.

How would you rapidly manufacture tooling for injection molding? Explain any difficulties that may be encountered.

Why is cooling the work (e.g., with a fan) important in the process of 3d printing?

How do scientists at pharmaceutical companies use 3d printing to design drugs?

Consider rider on a typical bicycle pedalling up a hill. Specifically, the case when the cyclist is using their body weight alone to apply the pedalling force. Draw a diagram of the situation that you can analyse the system and answer the following questions:

a) Does the mass of the rider affect the acceleration of the bike (and rider) up the hill?

b) Is there an optimum ratio from pedal crank radius to rear wheel (including the chain drive ratio) that will maximise the acceleration?

c) Is there a maximum angle that the bike and rider could ride up?

d) How does the angle of the pedal affect the acceleration (if at all)?

e) What coefficient of the friction is needed between the tire and the wheel to ensure no slipping?

Ignore air resistance and friction losses within the bike.

3. (a) Outline with the aid of a schematic diagram the different stages in the processing of an Interstitial Free strip steel

(b) Discuss the principles of the pearlite transformation in a eutectoid (0.76%wt C) plain carbon steel

(c) List four main mechanisms and microstructural features which contribute to the high strength of martensite in marageing steels

A multi-stage gas turbine is to be designed with impulse stages, and is to operate with an inlet pressure and temperature of 6 bar and 900 K, and an outlet pressure of 1 bar. The isentropic efficiency of the turbine is likely to be 85 per cent. All the stages are to have a nozzle outlet angle of 15 degrees, equal inlet and outlet blade angles, a mean blade speed of 250 m/s and equal 5 kJ/kg K o inlet and outlet gas velocities. Estimate the number of stages required. Assume cp 1.15 kJkg K and y 1.333.

[Suggested Answer: 2.54 stages (practically 3 stages)

Engine oil at a hundred degrees Fahrenheit passes through 1/8 inch diameter tube at a volume flow rate of 50ft³/m . If the surface temperature is 150 degrees F, what is the heat transfer rate Q.  

Q = ?????? Btu/h. Assume a smooth surface and the tube length is 5 meters.

From the book use p (density) = 54.24 lbm/ft^3,_,

Specific heat = 0.4809 Btu/(lbm*R)    R=Rankin,

Thermal conductivity = k= 0.08207 Btu/(h*ft*R)   

u = 7.617 * 10 ^-2 lbm/ft*s, u = fluid viscosity

Pr = 1607, Pr = Prandtl number

Design a DISC BRAKE based on the given below. Draw schematic diagram and show complete solutions/computations with direct subtitution. Also compute for the forces involved in the system.

GIVEN:

Braking Force (HP) = 15 HP

N (RPM) = 1800 RPM

Brine (S.G. = 1.2) flows through a 200 gpm pump. The pump outlet is 6” pipe and is 4 feet above the 8” pipe inlet. The inlet vacuum is 6” Hg. Outlet pressure is 20 psig. What is the water horsepower (WHP) of the pump? What color should the pipes be painted that are connected to this pump?

A piston-cylinder heat engine has five kilograms of air as the working fluid. Analyze this engine as a Carnot engine and determine the work of expansion and the amount of heat rejected in KJ assuming constant specific heat at 300k. During the heat rejection, the temperature is 300?. There is a temperature difference of 600 degrees in the engine. At the beginning of the heat rejection process, the pressure is .2MPa and during heat addition the volume doubles. Draw the P-v diagram and T-s diagram for the cycle.