A torsion test is performed on an aluminum probe, with the following results given in the following table:

The probe dimensions are as follows:

Length(L)

Diameter(D)

Through your graph of behavior of shear to torsion against angular deformation determine the following:

• Limit proportional to the cut

• Shear creep (0.2% deformation)

• Maximum resistance shear
• rigidity modulus (G)

• Cut Resilience Module

 Failure type (malleable, ductile, tenacious or brittle)

3. The compression ratio of the ideal air-powered diesel cycle is 14, while the cutting rate is 1.8.Since the air was initially at 100 kPa and 25 ° C;
a. Pressure and temperature at the end of the heat transfer process
b. Thermal efficiency
c. Find the mean effective pressure (M.E.P).

The radius of the impeller of a centrifugal pump at the inlet is 6 cm and at the outlet is 10.5 cm. The blade angles β1 and β2 are respectively 33o and 21o respectively. The width of the impeller is uniform and 4.75 cm. The impeller rotates at 1200 rpm and pumps water (See Figure 1). Assuming radial entry, (a) the flow rate through the pump (b) the theoretical head (c) the power required assuming an efficiency of 75%. (d) the theoretical pump curve (the H-Q equation) (e) If the pump diameter were increased by 10% and the speed dropped by 10%, what would be the new flow and theoretical head?

Indicate whether the following statements are true or false. Explain.

1. The specific enthalpy of an ideal gas is a function of temperature and pressure.
2. Air cannot be regarded as a pure substance.
3. Liquid alternatively referred to as compressed liquid because its pressure is less than atmospheric pressure.
4. The pressure and temperature are not dependently variable for a system contains a two-phase liquid–vapor mixture at equilibrium.

An expansion tank is a necessity in a chilled water cooling network because:

1. The network is a closed loop system
2. It allows for the variation in temperature of chilled water in the chilled water circuit
3. Both A & B
4. None of the above

Please answer in less than an hour :)

Can you explain and show how we get the Specific Cutting pressure in GPa if vertical force is 0.882 kN, feed rate is .0508 mm/rev, and depth of the cut is 1.8161 mm.  

Q2 Describe the following tools as used in
directional drilling.
I. Bent Sub and Positive Displacement Motor
II. Non‐Rotating Steerable Drilling Systems
III. Rotary Steering System
IV. Directional Bottom Hole Assemblies (BHA)
V. Whipstocks

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.