Assuming we are deciding to manufacture socks that are made by cotton surrounded by nylon

Define a predictive maintenance plan for the components of your plant.

a. Describe the components that will be under the plan (what tools, machines, robots, etc)

b. Choose two of those components and define a detailed plan of activities for their predictive maintenance

1. Suppose there a joint where the bolts have a stiffness of 1638 kips/in per bolt and the members have a stiffness of 10930 kips/in per bolt. The bolts are ½-13 UNC, SAE 8 grade, installed for non-permanent installation. The maximum load is 14 kips per bolt. For the fatigue calculation, consider that the minimum load is zero.

a) What is the stiffness constant, C, of the joint?

b) What is the proof load, SpAt, of the bolt, in kips?

c) What is the pre-load, Fi, on the bolt, in kips?

d) What is the factor of safety in yield, np?

e) What is the load factor of safety, nL?

f) What is the joint separation factor of safety, nO?

g) What is the midrange stress, sm, in kpsi?

h) What is the amplitude stress, sa, in kpsi?

i) What is the initial stress, si, in kpsi?

j) What is the fatigue factor of safety, nf?

k) Is this joint safe in both static and fatigue loading?

2. If the ½-13 UNC, SAE 8 grade bolts from the previous problem are zinc-plated and eight of them are used on a 6 in. bolt circle,

a) What is the minimum number of these bolts that should be applied to this bolt circle?

b) What is the maximum number of these bolts that should be applied to this bolt circle?

c) Are eight bolts an appropriate number here?

d) What is the torque required to make up the bolts to the required pre-load, in in-kips?

e) What torque would be required to make up the bolts for permanent installation, in in-kips?

A four-stroke engine is running on methane with an equivalence ratio of 0.8. The air and fuel enter the engine at 250 C, the exhaust is at 5270 C, the heat rejected to the coolant is 340 MJ/kmol of fuel.(a)Write the equations for stoichiometric and actual combustion.(b)By calculating the enthalpy of the exhaust flow, deduce the specific work output of the engine, and thus the overall efficiency. (c)If the engine has a swept volume of 5 Litres, and volumetric efficiency of 72%, calculate the power output at engine speed of 1500 rpm. The ambient pressure is 1 bar.State clearly any assumption that you make, and comment on any problem that would occur with a rich mixture.

Describe the design criteria for the next combustor sections.

1.-Diffuser

2.-Primary zone

3.-Intermediate Zone

4.-Dilution Zone

5.-Swirler

6.-Primary zone holes

7.-Cooling slot

1.-Define the combustor loading parameter.

Why is the exponential factor different to ideal scenario?

A shock wave in air exists in a de Laval nozzle where the cross-sectional area is 130 cm².The inlet Mach number, area and static pressure are 0.35, 210 cm² and 350 kPa. The exit area of the nozzle is 135 cm². Find:

• The back pressure for this shock wave to occur

explain the consideration in the design of the dimensions of formed and the parallel key having rectangular cross- section

For the flow over a circular cylinder discuss the differences and similarities between the potential flow solution and the real viscous flow.

A well was drilled to 3000 meters depth with a casing of (9 5/8 inches) nine and five eigths inches with an internal diameter of 6,69 inches, they continued drilling up to 4800 meters obtaining a diameter of 6.7 inches average. Before finishing the drilling they made a test with a drill pipe of (5 1/2 inches) five and a half inches long with a diameter of 4,78 inches until the bottom of the well.
If we consider that the pump used for the job it's a triplex pump, calculate the returning time of the drill pipe that the test was made with.

A well was drilled to 3000 mts depth with a casing of 9 5/8 inches outer diameter and an inner díameter of 6,69 inches, they continued drilling up to 4800 mts obtaining an average hole diameter of 6,70 inches .
Before finishing the drill hole, they sent down the Casing a set of drill pipes with a Tricone . The drill pipes measured 5 1/2 inches outer diameter and an inner diameter of
4 7/8 inches.
Taking into account that the water pump used for the job is a triplex pump, calculate the time for the return of water when the pump efficiency is 0,94 with a cylinder length of 7,5 inches and a displacement 4 gallons/stroke and 30 strokes/ minutes

1. A circular Euler column with one end fixed and the other pinned (or hinged or simply-supported) is under a compressive axial load. Given the length L of the column and bending rigidity EI, what is the buckling load P_cr ?

Stresses at a point are: 60 MPa in the x-direction, 80 MPa in the y-direction and no shear stress in this reference x-y plane. Note that these are already the principal stresses and the reference plane x-y is the principal plane. What are the stresses at 45^o clockwise from the principal planes? Show them on a properly-oriented element. Mohr’c cirle is to be used and no equations will be accepted.

2. Initially, the steel sphere with a diameter of 15 cm with a temperature of 200°C was left to cool in the airflow at a temperature of 6 m/s. By making the necessary acceptances, calculate the amount of time the aluminum sphere will fall to a temperature of 50°C.

The relevant correlation for forced transport on the sphere;

NuD = 2 + (0.4 ReD 0.5+ 0.06 ReD 2/3) Pr 0.6 (μo/μy)1/4

The flow limit of commercial-grade aluminum is given as σ = 120 MPa, the modulus of elasticity is E = 70 GPa and the density is 2.7 gr / cm3.
a) There is a 4mm diameter and 3m long wire which made with this material. How many N should be applied to make this wire 3mm longer?
b) If a 4 mm diameter wire made of this material is hung from the ceiling, what should be the total length of the wire to carry its own weight without plastic deformation?

just please step-by-step because it's too important for me. thanku so muc

design and their source water heat pump using simulation of software Photon 77 and explain step-by-step the theoretical as well as experimental steps to be carried out in order to design linear compressor technology in the air source heat pump using split evaporator

Two large tanks with the same levels of water inside, one is open to the atmosphere while the other is closed and pressurized with an inside pressure of 65 k Pa gage . Water is to be pumped to the pressurized tank by a pump with 85% efficiency, placed in a stainless steel pipe connecting the two tanks at the lowest level. The pipe is 9cm in diameter, 100 m long and the volume flow rate is 0.025 m³/s

• find the power of the pump