We have a metal alloy (bcc) that

Metal A is FCC, 30 atom% (40.244 wt%), r=0.2 nm, A = 55 g/mol

and, Metal B is BCC, 70 atom% (59.756 wt%), r=0.24 nm, A = 35 g/mol

1. Find the volume per atom for metal A and metal B by dividing the unit cell volume by the number of atoms in the unit cell. Put your units in cm3/atom.

2. Use the atom% values and the answers to (a) to find the average volume per atom

An audit was conducted on a large food processing plant and it revealed poor maintenance practices resulting in numerous and repeated equipment failures, low reliability and availability. You are required to recommend the key elements of an effective, optimal and proactive maintenance programme that will ensure sustained and continuous improvement which will result in world class standards of reliability and availability.

An audit of the maintenance management function in a food processing plant indicated that Maintenance Technicians were not suitably equipped to perform their jobs effectively. What are the requirements or resources needed by these Maintenance Technicians to do an effective and efficient job?

On plant Mercury there is a special lake with two layers: dH2O and dHg (liquid mercury). The liquid water layer floats on top of the liquid mercury layer. Let ρH2O and ρHg denote the densities of water and mercury respectively. The gravitational field near the planet’s surface is gy, and the the atmospheric pressure near the surface of the lake P0.

a.Determine an expression in terms of the gi variables for the pressure in the lake as a function of depth all the way to the bottom of the layer of mercury. Graph this function.

b. Suppose an object density ρ is dropped into the lake. Assume ρH2O < ρ < ρHg. What fraction of the object you think will be submerged in the mercury after the object comes to rest in static equilibrium in the limit ρ → ρH2O .What fraction of the object you think will be submerged in the mercury after the object comes to rest in static equilibrium in the limit ρ → ρHg?

c.Determine an expression for ρ in terms of ρH 2O and ρHg that you believe would result in the object being half-submerged in the mercury layer and half-submerged in the water layer?Assume ρH2O < ρ < ρHg

d. Consider the general case where the density of the object is simply the unknown variable p. Determine an expression for the fraction of the object that will be submerged in the mercury when the object comes to rest in static equilibrium?

a broth suspension containing 1.20E + 06 bacterial spores A with a D value of 2.3 minutes and 8.00E + 06 bacterial spores of bacterium B with a D value of 15 minutes both heated at 121.1 Celsius
a). calculate the time needed to obtain the final microbial amount of 1/1000
minute bacteria A
minute bacteria B
b). Determine the D250 value if after 10 minutes the live spores live only 30 spores
minute bacteria A
minute bacteria B

P3. It is desired to begin with a eutectoid steel, it is desirous to reach a combination

(a) 680 HB and ~0%RA

(b) 260 HB and 20%RA; , please recommend material and treatment preferably with given composition if not suggest alternative. Explain the use of TTT/Phase diagram and combination of phases

The differential equation for the current in an RLC circuit is given by

L d²i/dt² +R di/dt+(1/c)i =wE₀ cos(wt) with initial values i(0)=0 and i'(0)=0.

Solve the above IVP.

4. a frozen cream ice is placed into the container before the freezing process is complete. The container has a slinder-shaped dimension with a diameter of 3.5m and is then placed in a water blast freezer with a heat conductivity coefficient of -25 W (m2 k). product temperature of -11 c and air temperature of -25 c. product density is 700kg / m3. thermal conductivity (frozen) 1.2 W / (m K), and specific heat 1.9 kj (kg / K). if latent heat is lost during the blast freezing process 250k j / kg. make an estimated freezing time? ... (kj / w)

Explain briefly the differences between simple, compound, and epicyclic gear trains

a single effect evaporator is used to concentrate a solution of 10% of total solids to 30% of total solids at a rate of 250 kg / h. if the evaporator pressure is 77 kpa, and if steam is available at 200 kpa gauge, the amount of steam needed per hour and the area of ​​heat transfer area if the overall heat transfer coefficient is 1700 jm -22s-1 ° C. the feed temperature is 18 ° C and the boiling point of the solution below 77 kpa is 91 ° C. the specific heat of the solution is the same as water, which is 4,186 x 103 jkg-1, and the latent heat of the evaporation of the solution is the same as the water under the same conditions
a. the amount of steam needed (kg/hour)
b. amount of heat moved area (m²)

Consider a very deep triangular duct (deep in the direction perpendicular to the plane of the
paper) made of diffuse gray walls. The cross section of the duct forms an equilateral triangle of
sides 1.5 m each. Two surfaces of the duct namely surface 1 and surface 2 have emissivities 0.4
and 0.6 and are maintained at 1200 K and 800 K respectively, while the third surface (surface
3) is radiatively insulated (re-radiating) and has an emissivity of 0.5. For the two dimensional
triangular enclosure as described above, answer the following:
(a) Calculate the total number of view factors and determine the view factor matrix
(b) Determine the net radiation heat transfer from surface 1
(c) Determine the temperature of surface 3
(d) If the emissivity of surface 3 is changed, how will your result change?

Two infinitely long plates with surface temperatures maintained at 600 K and 300 K
respectively are placed parallel to each other. Two infinitely long radiation shields are placed
in the evacuated space between these plates. All the surfaces mentioned above are gray and
diffuse and have an emissivity of 0.85. Determine the steady state temperatures of the radiation
shields.

Consider a regenerative Rankine cycle with one steam extraction point using an
open feed-water heater (OFWH).
P at boiler = 5 MPa
T at turbine inlet = 600 0C
P at OFWH = 1 MPa
P at condenser = 10 kPa
All device efficiencies = 1
Solve the problem analytically step by step; find all work interactions, heat transfers, and
the thermal efficiency.