3.1. Oil with (ρ = 788 kg/m3 and ν=0.00067 m2 is removed to the atmosphere through a pipe, 7mm diameter, and 37m long. The pipe is located 3.5m from the top of the oil. If the pipe is build using smooth stainless steel, find the flow rate of the oil and the condition of the flow.

3.2. A water tank is located at the top of the roof with 20°C of water that will be used for showers. The tank is connected to a 25m long and 17mm diameter of asphalted cast iron pipe with 6 bends (KL = 1.2). Water needs to flow at 60 L/s, find the high of the water level. (Use Moody Chart for your reference)

Each axis of a two-axis plotter utilises a stepper motor with 60 pulses per revolution. For each axis, the output is coupled to a lead screw with a 13:1 gear reduction and has a pitch = 0.9mm. The table is required to travel along a linear trajectory with neither axis exceeding a travel speed of 160mm/min. To achieve an incremental position of 310mm along the x-axis and 800mm along the y-axis, determine the motor speed required for the y-axis in Hz.

The department has been approached by the school superintendent about starting a Fire and Life Safety Education Program for all grades, K-12. As the fire inspector, this project will fall under your responsibility. The superintendent has asked that you submit your program plan in writing so that it can be reviewed and discussed at the next school board meeting. If your plan is approved, the program will begin the next school year. However, there are budget constraints, and several members of the school board feel like there are more important areas and programs that need funding.

You are to create a plan for a Fire and Life Safety Education Program. Given the circumstances with some of the school board members, your plan should begin with a summary of a comprehensive overview of general fire safety for occupied buildings. You should also demonstrate rationale for the general fire safety provisions as methods of fire protection. Let them know how important this program is through the short-term and long-term benefits to students and to the community as a whole. Also, be sure to include the following:

• goals for the program,
• organization of grades (Will you group some grades?),
• a broad outline of the topics to be taught,
• broad details of any special events/activities, and
• a plan to keep the program going, year after year. (Will certain grades be taught certain topics each year so that, as student progress, they learn new things?)

Your response must be at least two pages in length, in APA style. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying APA citations. The title and reference pages are not included in the page-count requirement.

In an interchangeable system, why is statistical approach is preferred over a complete interchangeability approach? State the condition for complete interchangeability approach.

1. An air conditioner using R134a as the working fluid operates on an ideal vapour compression system between 0.3 and 0.8 MPa. If the specified capacity for air conditioning is 20 kW. What would be its capacity for food freezing for which the evaporator temperature -20^oC. Show the cycle on a PH diagram and explain the effect of the changes to the compressor and condenser respectively.

1. A bio-reactor is kept at 45°C on a day where the outside is 20°C. It is estimated that the bio-reactor loses 12 kW to the ambient. Waste heat at 450 K from an engine is used to deliver the heat to the bio-reactor. Find the destruction of exergy and where it is made.
   
   
   
2. The condenser in a power plant cools 10 kg/s water at 10 kPa, quality 90%, so it comes out as saturated liquid at 10 kPa. The cooling is done by ocean water coming in at ambient 15°C and returned to the ocean at 20°C. Find the second-law efficiency of the condenser.
   

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