If the measured power is 18.5 watt, rotational speed is 245 rpm, radius R of inner cylinder is 72.5 mm, thickness of liquid is h1 = h2 = 2.35 mm and the height of the fluid is y = 335 mm, determine the viscosity of the viscometer fluid.
In: Mechanical Engineering
What is the difference between the application of Teamcenter and Technomatix software?
In: Mechanical Engineering
Sustainable Engineering:
a) Discuss the origins of sustainable engineering, what it is, and why it is important.
b) Discuss and critique one method for assessing environmentally sustainability of engineered solutions.
c) Explain how one could estimate the social impacts of engineered options using community/stakeholder communication and consultation.
d) Describe a general approach for estimating the economic sustainability of an engineered option.
e) Explain how you would evaluate a solution using a triple bottom line analysis.
In: Mechanical Engineering
Question1) A motor shaft is subjected to 4 kN axial load and 2 kN radial load. shaft rotates 800 rpm and its roller bearing has lh=10000 hours working life.Choose the single row roller bearing .(define the diameter of shaft)(Can you assign it to the table pictures.)
In: Mechanical Engineering
Soru 4) At atmospheric pressure, it is boiled in a steel pot with an electric heater from below. Calculate the heat flux transferred from the surface to the water when the surface temperature is 120 oC. Compare with the critical heat flux for bubbly boiling. Take the necessary values for the calculations from the tables.
In: Mechanical Engineering
1. screw pump test rig in detail
2. general use screw pump
3. identify its accuracy, precision and time respond in getting a reading.
4. the advantage and disadvantage of screw pump.
In: Mechanical Engineering
- Discuss the operating principles of both heat pumps and industrial refrigeration systems.
- Assess the factors that influence the economics of heat pumps. -
- Discuss the apparent contradiction between refrigeration cycles and the second law.
- Conduct a cost-benefit analysis on the installation of a ground source heat pump on a smallholding. Present your findings in the form of academic poster/presentation
In: Mechanical Engineering
(a) What is the difference between atomic structure and crystal structure
(b) Sketch the BCC and the FCC unit cells and show that the atomic packing factor for a BCC unit cell is 0.68.
(c) Molybdenum has a BCC unit cell, has an atomic radius of 0.1363 nm, and an atomic weight of 95.94 g mol. Compute its theoretical density and compare your answer with its experimentally measured density of 10.22 g cm³. The Avogadro’s number is 6.023x1023 atoms mol- and 1 nm is 109 m.
(d) What is a polymorphic (allotropic) phase change? Give example.
In: Mechanical Engineering
3. a. Describe homogeneous, isotropic, anisotropic and orthotropic materials and the nature of mechanical properties for such materials.
b. Discuss slider crank mechanism and quick return mechanism
c. Considering engineering application that uses any of the mechanisms, describe how mechanical properties can be used for design.
In: Mechanical Engineering
In: Mechanical Engineering
Hydrogen at 25oC and 0.1 Mpa is fed to the head of a cutting torch. Calculate the adiabatic flame temperature if the hydrogen is burned with 250% excess air at at 25oC and 0.1 Mpa,
a) without taking into account dissociation
b) assuming equilibrium composition of water has been achieved (both dissociation reactions of water reach chemical equilibrium)
In: Mechanical Engineering
Completely and thoroughly explain how Averages were determined and used by any company that either makes or installs any type of Heating or Air Conditioning Product
You may briefly summarize the concept, but at least 70% of your answer should be an explanation of how that concept is applied to the company specified in the question.
In: Mechanical Engineering
Consider an ideal Brayton cycle with reheat (air standard). The
pressure and temperature of the air at the inlet of the gas turbine
is 1200 kPa and 1000 K respectively. Assume the gas expands to 100
kPa in two stages. Between the stages, the air is reheated at a
constant pressure of 350 kPa to 1000 K. Assume a fully isentropic
process in the turbines.
Find:
(a) the work produced at each stage, in kJ/kg of air flowing.
(b) the heat transfer for the reheat process, in kJ/kg of air
flowing.
(c) the increase in net work as compared to a single stage of
expansion with no reheat.
In: Mechanical Engineering
Construct a vertical U-tube manometer to measure the pressure difference across a flow section. Explain in details and write an equation relating to the pressure difference to the difference in liquid level. Recommend TWO techniques to increase the sensitivity of a manometer. Justify your recommendation with the aid of diagrams and equations.
In: Mechanical Engineering
Heat & Mass Transfer
Consider the flow of water over a flat plate at a film temperature of 25 °C. The plate is 10m long, and the Reynolds number at the end of the plate is 106.
Determine:
The free stream velocity
Is the flow laminar or turbulent at the end of the plate?
Is the flow laminar or turbulent at the mid-length?
What is the average Nusselt number?
What is the average heat transfer coefficient?
What is the Nusselt number at the end?
What is the heat transfer coefficient at mid-length?
What is the drag coefficient at mid-length?
In: Mechanical Engineering