Engineering report writing on autoclave (sterilizer) machine breakdown which occurs more often due to hard water/untreated water. The factors which leads to that and the solution to the problem. Recommendation and Summation to be included. Write 3 to 4 A4 pages.

A convergent–divergent nozzle with an exit area to throat area ratio of 3 is supplied with air from a reservoir in which the pressure is 350 kPa. The air from the nozzle is discharged into another large reservoir. It is found that the flow leaving the nozzle exit is directed inward at an angle of 4° to the nozzle centerline. The velocity on the nozzle exit plane is supersonic. What is the pressure in the second reservoir?

In transonic wind tunnel testing, the small area decrease caused by placing the model in the test section, i.e., by the model blockage, can cause relatively large changes in the flow in the test section. To illustrate this effect, consider a tunnel that has an empty test section Mach number of 1.08. The test section has an area of 1 m2 and the stagnation temperature of the air flowing through the test section is 25°C. If a model with a cross-sectional area of 0.005 m2 is placed in this test section,find the percentage change in test section velocity. Assume one-dimensional isentropic flow.

Air at a pressure of 350 kPa, a temperature of 80°C, and a velocity of 180 m/s enters a convergent–divergent nozzle. A normal shock occurs in the nozzle at a location where the Mach number is 2. If the air mass flow rate through the nozzle is 0.7 kg/s, and if the pressure on the nozzle exit plane is 260 kPa, find the nozzle throat area, the nozzle exit area, the temperatures upstream and downstream of the shock wave, and the change in entropy through the nozzle.

Air is supplied to a convergent–divergent nozzle from a large tank in which the pressure and temperature are kept at 700 kPa and 40°C, respectively. If the nozzle has an exit area that is 1.6 times the throat area and if a normal shock occurs in the nozzle at a section where the area is 1.2 times the throat area, find the pressure, temperature, and Mach number at the nozzle exit. Assume one-dimensional, isentropic flow.

For the project you have selected for this class, do the following: "House maintenance"

   a. Collect the appropriate data to analyze (characterize) the current situation.

   b. Decide which tool(s) from the course will be used in the analysis.

   c. Analyze data using the tool(s) selected.

   d. Determine course of action based on the analysis (improved situation).

A liquid at 300 F flows through a 3-in. steel pipe (schedule 40) covered with a ½ in. thickness of asbestos insulation. The ambient temperature is 80 F. The inside surface film coefficient is 40 Btu/hr-sq ft-F, and the outside surface film coefficient is 4.0 Btu/hr-sq ft-F. The thermal conductivities of steel and asbestos can be taken as 25 and 0.11 Btu/hr-ft-F respectively. What's the heat loss per foot length of the pipe?

A liquid at 300 F flows through a 3-in. steel pipe (schedule 40) covered with a ½ in. thickness of asbestos insulation. The ambient temperature is 80 F. The inside surface film coefficient is 40 Btu/hr-sq ft-F, and the outside surface film coefficient is 4.0 Btu/hr-sq ft-F. The thermal conductivities of steel and asbestos can be taken as 25 and 0.11 Btu/hr-ft-F respectively. What's the heat loss per foot length of the pipe?

in viscous damping free vibration response what has the most powerful effect among m, c, k and initial condition? please write the reason.

A 2,900 square foot retail (sales) space located in Lewiston, ID is to be maintained at 69ºF DB. The total heating load for the space is calculated to be 130 MBH. The space is supplied by a heating only unit and is applied as a single zone configuration. Assume there are 45 people in the space.

What is the heating load on the unit coil?

Compare and contrast spin recovery procedures of two different aircraft. What makes the recoveries different for each aircraft?

A steel has a modulus of elasticity of 29,000 ksi and an elastic limit of 52 210 psi. A rod of this material and cross section of 0.0186 in2 and 36 in length is fastened vertically to a beam with a load of 410 lb at the opposite end. Determine: a) If this load is removed, will the bar return to its initial length? Justify the answer; b) The unitary deformation of the bar in these conditions; c) The minimum diameter of a bar of this material and that does not present permanent (plastic) deformation when subjected to a load of 11,500 lbs.

answers :a) 157.17 MPa  360 MPa (SLE) b) 0.076 %; c) 0.0134 m.

Develop a single or set of event trees to describe the escalation mechanism that would lead to an impairment of a TR from a fire or explosion in an adjacent module. Your event tree(s) should include the direct effects of fire and explosion and escalations which may lead to impairment of the TR by fire, smoke or structural failure. Present your event tree(s) and discuss all underlying assumptions

A laboratory drying oven has a composite wall made of Plane Wall 1 and Plane Wall 2 as shown above. A thin film heater (surface heat source, thickness negligible) is sandwiched between the two plane walls 1 and 2. Plane Wall 1 has a thickness L1 = 0.02 m and a thermal conductivity k1 = 0.05 W/m·K, while Plane Wall 2 has a thickness L2 = 0.01 m and a thermal conductivity k2 = 0.1 W/m·K. During steady state operation, the oven air maintains a constant temperature T∞,2 = 60 ˚C, while the heater layer is controlled at a temperature of TH = 90 ˚C. The drying oven is put inside a room where the ambient air temperature T∞,1 = 30 ˚C, and the heat transfer coefficient between the outer surface of the Plane Wall 1 and the ambient air h1 = 3 W/m2 ·K. First, assume the heat transfer coefficient between Plane Wall 2 and the oven air is h2 = 3.5 W/m2 ·K. For simplicity, assume that the drying oven has 4 side walls (each is 0.5 m long and 0.5 m high), and both the top and bottom surfaces of the oven are perfectly insulated. Consider the oven air and ambient air as an ideal gas with density ρ = 1.13 kg/m3 , specific heat capacity cp = 1000 J/kg·K, kinematic viscosity v = 15x10-6 m2 /s, thermal conductivity ka = 0.027 W/m·K, volume expansion coefficient β = 3.4x10-3 (1/K) and a Prandtl number of Pr = 0.71. Contact resistances do not occur. Additionally, all effects of thermal radiation may be neglected.