10 cm of copper with square cross section of 1x1 cm exposed to 200 KN tension force
caused 15% permanent reduction in cross section area , if the fracture got on this point,
calculate the following:
1 – the ductility
2 – stress
3 – true stress
4- fracture stress

--fluid mechanics--

The diameter of the soap bubbles (d) formed by a bubble toy is thought to be a function of surface tension between the soap-water solution (σs), the pressure difference between inside the bubble and the environment (ΔP), the diameter of the circular wire frame (D), the dynamic viscosity (μ) and the density (ρ) of the soap-water solution.

a) How many dimensionless parameters arise from this configuration?

b) Is there an evident dimensionless parameter which can be found without any calculation? If yes, which parameter?

c) If two of the repeating variables are given as surface tension (σs ) and density (ρ), find the rest of the repeating variable or variables.

d) Find the dimensionless parameters (Pi numbers)

e) The model experiments the D=3 cm diameter wire frame submerged into soap-water solution whose surface tension (σs) is 0,025 N/m, is blown with an effective pressure of 20 mm water-column. Find the effective pressure that needs to be applied if the D=30 cm wire frame prototype will work at 30°C (σs = 0,02 N/m)

i. Assuming you are new engineer working in R & D division at manufacturing company which has decided to evaluate CAD/CAM system to adopt in your company in order to meet Industrial 4.0. (Select your company such plastic moulding, automotive, aerospace, marine etc). The company are required yourself to outline executive report for them to decided which suitable CAD/CAM system can be selected. Your report must discuss the suitable CAD/CAM system by referring to current trend which available can be accessed in the journals, articles, books, market/industrial report etc. You are assigned to this assignment with an individual work.

Q2.
a. List the difference between non-fusion and fusion forms of welding.
b. Describe how the rightward or backward welding technique is done and stating its advantages
and also when it is mainly used.
c. With the aid of a labeled diagram, describe the gas welding process.
d. (i) Give one major reason for the use of fluxes during welding. Give one example.
(ii) Mention any two hazards that may occur in the welding workshop.

For a butanol combustion process (formation enthalpy -332,000 kJ / kmol) C4H10O with an excess of 25% air (reagents are at standard conditions T = 25 C, P = 1atm).

Determine:

a. Adiabatic flame temperature

b. If the products come out at a temperature of 600 K, determine the heat generated in the combustion chamber.

Q1

In the aerospace industry, the material cost is small in relation to the total fabricated cost of the material. If we assume approximately 10% of the total value of a pound saved on a sattelite may be spent on raw material, how much can we spend (in dollars per pound) on raw material?

Q2

Using the result of the previous question, which of the following materials can be justified for use in fabrication of a sattelite if a large majority of the sattelite will comprise the material selected?

nickel-based superalloys

silver

palladium

gold

high-strength composites

Q3

Based on the analysis of this section, at most approximately $.20/lb can go toward raw material cost in the fabrication of rail and ship transit carriers. What is the most expensive material that is feasible in the fabrication of the structural components in this sector?

wood

concrete

carbon steel

plastic

PLEASE I NEED CORRECT  ANSWER

Explain how the load conditions related to shear diagram, and how shear conditions related to moment diagram.

You are considering two columns with identical dimensions. One is constructed out of steel, the other aluminium, which will buckle at a smaller load? The euler formula for critical buckling force for column, pin jointed at both ends is given by Pcr = pi^2 EI/ L^2 if the end of the column are constrained to prevent rotation, how will the buckling force change?

Q2 The pump of a LiBr--water absorption refrigeration system delivers (0.7 kg/s) of
solution. The absorption system operates at the following temperatures: generator (I 10 'C);
condenser (40 'C); evaporator (lO 'C); and absorber (33 'C). Calculate;
(a) The refrigerant mass flow rate, the refrigerating capacity, and the COP of the system.
(b) The COP of an ideal heat-operated refrigeration system that operates with the same
temperatures.

We will find the Moment of Inertia Moment and Polar Moment of Inertia of a U profile that will determine its dimensions by ourselves.