Why is three wire method preferred for measuring the effective diameter of thread over two wire method? derive mathematical equation of with worth thread

Students will design a mutually operating gear system under the conditions given in this question. (Sizing will be done as a result of calculations according to working conditions, material, construction status and strength). In this design, shaft and bearing calculations will not be made. Only mutual gears will be designed according to the data and acceptance. The student will make assumptions for the values and information that are not given and will explain why he made this assumption.

Input Power: 8 Kw

Input Cycle : 1224

Cycle Rate: 4

Gear Material: 1050 Steel

A high carbon steel shaft is used in an engine and subjected to different loads. In order to
analyse the stress in the shaft, consider a rectangular element within the material. This
element is subjected to compressive stress of 135 MPa and shear stress of 166MPa in the
vertical direction. The compressive stress in the horizontal direction is 176MPa with a shear
stress of 115MPa.
a. Sketch the state of stress on this element.
b. Determine the maximum and minimum normal and shear stresses and their plane of
orientation.
c. If the yield strength of the material is 350MPa, Poison’s ratio is 0.32, and factor of
safety is 5, determine the diameter of the shaft to avoid failure.
d. What will be the difference in the analysis above if there is an additional torsional
load (T) and bending moment (M).
e. Show how you can use any theory of failure to design this shaft.
f. What are the challenges of applying the theories of failure in actual engineering
practice and as a design engineer, how would you deal with these challenges.

A simple R134a plant is develop 70000kJ/hr of refrigerant leaves the evaporator as saturated vapor at 10 degree c. After isentropic compression the pressure of refrigerant is 10 bar. Draw the P-h diagram and determine 1) the refrigerant flow rate 2) the compressor discharge temperature 3) the heat rejected to the condenser in KW 4) The COP 5) the power required to drive the compressor

Why do we may avoid normal shocks when designing aircraft geometries?

A syngas fuel consists of these following volumetric composition: 75% methane and 25% butane. The syngas at 100 kg/hour and 25oC is mixed with 20% excess air at 30oC. Due to incomplete combustion mechanics, 10%v of the syngas carbon is partially oxidized and forms carbon monoxide.
If the products of combustion are at 600K, obtain the combustion heat transfer rate from the system.

a) Briefly write down the basic heat gains that make up the cooling load in items.

b) A desired feature from refrigerants is that the evaporation pressure is high and the condensing pressure is low. Explain the main reason for this by drawing the T-s diagram of a single-stage cooling cycle.

1. How would you expect a flaw to affect the mechanical properties of brittle materials?

A tank of water is emptied by the force of gravity through a syphon. The difference in water levels between the two tanks is 3 m and the highest point of the syphon is 2 m above the top surface level and the length of the pipe from inlet to the highest point is 2.5 m. The pipe is designed with a bore of 25 mm and the length 6 m. The pipe frictional coefficient is 0.007 and the inlet loss coefficient K is 0.7. Calculate the following:
4.1 the volume flow rate and,
4.2 the pressure at the highest point in the pipe

Two tanks each contain 100 gal of water and tank 2 initially has 50 lbs of salt uniformly dissolved in it. An external flow brings adds 5 gal/min to tank 1 with 5 lbs of salt in it. Tank 1 feeds tank 2 at 10 gal/min, and tank 2 feeds back to tank 1 at 5 gal/min. Finally, an exit stream leaves tank 2 at 5 gal/min.

1) Use Laplace transforms to solve the system of ODEs modeling this system and report the amount of salt in tank 2 as a function of time.

2)find the Homogeneous solution for the system of ODEs above without Laplace transforms; instead, using eigenvalues/eigenvectors.

3)Solve the Particular solution for the system of ODEs above using Undetermined Coefficients.

A)Model the heat transfer system that occurs during the extrusion process and explain the types of heat transfer that occur during the process.

B)Mold material, material to be extruded, mold sizes, material size and section type, extrusion force, ambient temperatures, material temperature, etc. Calculate the heat loss to the environment by using the material-mold-environment heat flow path during the extrusion process by determining the material and process parameters yourself and choosing the conduction and convection constants of the material and environment correctly.

A student studying in medical school, according to the body structure of a person with high fever, the body
will help calculate the time required to lower the temperature to a certain degree
wants you to develop a formula.
Heat produced in the human body 400 W, total heat passing through the body through transmission, convection and radiation
If 800 W and body specific heat 3500 kJ / kgK, other students may also need other features.
By choosing according to your own body structure, the time to lower the body temperature by 10 o C.
You calculate.

size=180cm

weight=93