An adiabatic steam power plant turbine receives 500kg/s in steady flow at 8MPa and 500 degrees C(state 1), the steam exits at 15kPa with quality of 0.95(state 2 actual). Find a) isentropic power output of the turbine using listed pressures, b) actual power output of the turbine, c) isentropic efficiency of the turbine, d) s2-s1
In: Mechanical Engineering
An adiabatic steam power plant turbine receives 500kg/s in steady flow at 8MPa and 500 degrees C(state 1), the steam exits at 15kPa with quality of 0.95(state 2 actual). Find a) isentropic power output of the turbine using listed pressures, b) actual power output of the turbine, c) isentropic efficiency of the turbine, d) s2-s1
In: Mechanical Engineering
There are three dominant metal additive manufacturing approaches: laser powder sintering, plasma metal wire, and electron beam metal wire. Construct a table that compares the three with respect to: breadth of materials that can be processed, quality of processed material, and scalability.
In: Mechanical Engineering
The specification of a pressure sensor is shown below: Range of measurement: 10 psi to 250 psi. Accuracy : ±0.2% of span. Transfer function : 0.5?/psi. Transfer function accuracy: ±0.1% Sensor output resistance, R : 2k? - 20k?. Sensor time constant: 200 ms
. The resistance is then converted to a voltage with the transfer function:
V= 10R/R+1000
1/Determine the uncertainty for measurement of 120psi. What is the possible pressure?
2/Determine the possible range of the transfer function. Interpret the possible range that you have determine.
3/Determine the linear relationship between resistance and pressure. Draw a graph and explain briefly why it should be linear relationship.
4/Determine the pressure result from a resistance of 10 k?.
5/At t = 0 s, the pressure change suddenly from 12 psi to 120 psi. Determine the voltage output and its pressure at 0.24 s. At what time the output reach 0.3V?
In: Mechanical Engineering
Recommendation and discussion for hydraulic pressure control valve using sequence valve (lab report)
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A convergent-divergent duct has a throat area that is 1/3 the area of the inlet. If the pressure at the throat is 95lbft2 less than the pressure at the inlet, what is the inlet velocity, assuming density is .002 slugs/ft3 ?
In: Mechanical Engineering
Compare the use of spring stripper and channel stripper in sheet metal dies in terms of their advantages and applications.
In: Mechanical Engineering
Explain the function of the following components with reference to sheet metal shearing dies:
a) pilots, b) Stock stop.
In: Mechanical Engineering
Define a fixture. Give a detailed explanation of the various elements that should be present in a fixture.
In: Mechanical Engineering
To reduce the required shearing force on the punch, to accommodate a large component on a smaller capacity punch press, shear is applied. In a blanking operation shear is applied on the
| a. |
Die |
|
| b. |
Die or punch |
|
| c. |
Punch |
|
| d. |
Die and punch |
The operation to be used to remove the burr produced during the blanking operation is
| a. |
Shaving |
|
| b. |
Trimming |
|
| c. |
Nibbling |
|
| d. |
Notching |
Jig and Fixture serve similar purpose and therefore either of them can be used interchangeably for any machining operation.
True
False
Cutter setting gauge needs to be provided in the case of fixtures for holding a part in any machining operation.
True
False
In: Mechanical Engineering
Given: A short cylinder of steel has a diameter of 150 mm and length of 500 mm. It comes out of a heat treatment process at a uniform temperature of 200oC and is plunged into an unstirred bath of oil at a temperature of 20oC.
Find: Considering heat loss from only the cylindrical surface (ignore the ends), which orientation would cool more quickly? One orientation is for the axis to be parallel to gravity and the other perpendicular to gravity.
Assume: 1. For the situation with the axis parallel to gravity, assume the cylinder behaves as a flat vertical plate. 2. Use the properties of unused engine oil (Table A.5) to model the oil bath
Will rate if full solution is present. Thank you
In: Mechanical Engineering
Why are materials whose yield stresses are ighly strain rate dependent more susceptible to brittle fracture than those materials whose yield stresses do not exhibit marked starin rate dependce
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Describe one mechanism by which creep deformation can occur at stress less than the yield stress
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Describe the mechanical test procedure for creep and fatigue testing of a material of your choice and schematically illustrate how the mechanical property data is representing (compare a typical creep cruve with a typical fatigue curve)
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Define toughness for the case of 1) elastic deformation 2) plastic deformation 3) fast fracture
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