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 166MPa 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.

System of external forces acting on a planar rigid body will cause its motion in a certain
manner. Explain in general how Newton’s laws of motion are used to describe this
relationship between external forces and the resulting motion. Draw free-body and inertia-
force diagrams clearly to illustrate this relationship
(5 mark)

For the two-dimensional, incompressible, irrotational flow, examine the uniform flow and the double flow superposition (flow over the roller).

a) Flow function and velocity potential.

b) Velocity field.

c) Stopping points.

d) Roller surface.

e) Surface pressure distribution.

f) Tensile force on the circular cylinder.

g) Lifting force on the circular cylinder.

why self heating is a problem in RTD's and not in thermisters?

A walk –in cooler 3 m by 5 m by 3m High equipped with twelve 0.6 m by 0.6 m triple-glass doors is used for general purpose storage in a drive-in market (heavy usage). The walls are insulated with 50 mm of expanded cut cell polystyrene, and the cooler is to be maintained at 2°C. Compute the cooling load in kilowatts based on a 16-h operating time if the ambient temperature is 25°C.

Describe the major categories of ferrous alloys.

Please find the correct option.(A-B-C-D)

A gas turbine power plant operates on a simple Brayton cycle with a pressure ratio of 8. Air enters the compressor with 37 degrees Celsius and 100 kPa pressure. The highest temperature of the cycle is 900K. The compressor and turbine are isentropic and their efficiency is 90% and 80% respectively. The properties of air will be assumed to be constant as Cv = 0.718 kj/kgK, Cp = 1.005 kj/kgK and R = 0.287 kj/kg, k = 1.4. Since the flow rate of the air entering the cycle is 1000kg / h, what is the net power of the cycle?

A-) 8
B-) 83
C-) 140
D-) 43

Thermodynamics

On a railroad a -0.8% grade meters at 0.4% grade station 2+700 whose elevation of 300 m. The maximum allowable change in grade per station having a length of 20m. is 0.15.

1. Compute the length of cuve.
2. Compute the stationing where a culvert be located.
3. At what elevation must tge invert of the culvert be set if the pipe has a diameter of 0.9m. and the backfill is 0.3m depth. Neglect thickness of pipe.

i need summary between (4-10) pages about ((Li-Br _ water absorption refrigeration system)) with name of the text box solutions in end page

A manufacturing process produces piston rings, with ID (inner diameter) dimension as shown above.
Process variation causes the ID to be normally distributed, with a mean of 10.021 cm and a standard
deviation of 0.040 cm.
a. What percentage of piston rings will have ID exceeding 10.075 cm? What percentage of piston rings
will have ID exceeding 10.080 cm? (4)

b. What is the probability that a piston ring will have ID between 9.970 cm and 10.030 cm? (This is the
customer’s specification that the supplier tries to provide .)
(ie.) If the specification is “9.970cm < ID < 10.030cm”, what %’age of piston rings are “out of spec”? (4)

c. Half (50%) of all piston rings have ID below 10.021 cm. What is the dimension corresponding to
the smallest 10%, and what is the dimension corresponding to the largest 10%? What is the
dimension corresponding to the smallest 20%, and what is the dimension corresponding to the
largest 20%

d. Piston rings with ID too small or too large have different problems that the assembly operation
(customer) would like to know about in advance.
From your results in b., how many parts in a production run of 5000 pieces would be above
specification? How many parts would be below specification?

Parts with large ID out-of-specification are charged back to the vendor at $2.00 each. Parts with
small ID out of specification are charged back at $1.25 each. What is the total expected penalty
cost (for the vendor) for the 5000 pieces?

An ideal Rankine cycle with reheat uses water as the working fluid. As shown in the figure below, the conditions at the inlet to the first turbine stage are 1600 lbf/in.², 1200°F and the steam is reheated to a temperature of T₃ = 800°F between the turbine stages at a pressure of p₃ = p₂ = 400 lbf/in.²

For a condenser pressure of p₅ = p₄ = 5 lbf/in.², determine:

(a) the quality of the steam at the second-stage turbine exit.

(b) the cycle percent thermal efficiency.

The conceptual, preliminary design, and detail design and development of a Power breaker speed breaker in systems engineering.

1. What is significance of powder shape in relation to density and strength of the powder metallurgy parts?
2. What is significance of metallic powder flow rate, density and green strength?
3. Graphite can be used as a lubricant in the metallic powder; what is advantage of using the graphite in addition to providing lubrication?
4. Describe isostatic compaction method, and identify its advantage over conventional powder pressing method?
5. Define liquid phase sintering, and explain it.
6. What is sinter brazing?
7. Identify one application of powder metallurgy which is based on impregnation.
8. List one application of powder metallurgy parts that utilizes infiltration.
9. Would you be able to make undercuts in the metallurgy parts through the powder metallurgy process? Explain.
10. Define sizing, and explain why it is performed?
11. Which environment would you recommend while performing a sintering process, and why? Oxidizing, reducing, or neutral
12. Identify at least one problem associated with using carburizing environment while sintering the plain carbon steel sprockets.
13. Identify at least one problem associated with using oxidizing environment while sintering plain carbon steel gears?
14. Search literature and identify at least one application of powder metallurgy to manufacture tools using composite materials.
15. Metallic sheets can be manufactured through rolling process using either plate or metallic powder as starting material; identify one drawback and one comparative advantage in each case.