A closed, rigid tank contains water initially at 250 °F with a quality of 0.4. The tank is heated until the water reaches 290 °F. Find the initial and final pressure, in lbf/in2 . Sketch the process on P-υ and T-υ diagrams (be sure to include the vapor dome, constant temperature and pressure lines, number your states, and indicate the process direction with an arrow). Thermodynamic
In: Civil Engineering
3. Calculate the load carrying capacity and percentage
of reinforcement for a short rectangular column of
cross section dimension 280 mm x 500 mm is reinforced with 4 bars
of 25 mm diameter, 2 bars of 20
mm diameter and 2 bars of 12 mm diameter. Use M30 grade concrete
and Fe 500 grade steel. Also
design a 4 legged ties necessary for this section.
In: Civil Engineering
A food processing plant wants to re-purpose a pump they used to pressurize the cold water system (35° F) to pressurize the hot water system (180° F). In every regard the cool and hot water systems are identical - only the temperature of the fluid is different. What is the correct impact on the net positive suction head available (NPSHa)?
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What is the importance of structural elements in engineering operations?
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A completely mixed activated sludge plant is not performing particularly well. You calculate a F:M of 1.5 mg/mg·day-1. What would you recommend to solve the problem?
| a. |
Raise the pH |
|
| b. |
Increase the dissolved oxygen concentration in the aeration tank |
|
| c. |
Lower the pH |
|
| d. |
Reduce the amount of sludge wasted |
In: Civil Engineering
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Determine the allowable axial compressive load for a 25-foot long A992 W8X40 structural steel column using the AISC procedure as indicated in your textbook. The bottom of the column is fixed, an the top is pinned. Use the material properties and dimensions as indicated in the appendices of your textbook.
|
250.3k |
||
|
131.4k |
||
|
215.8k |
||
|
283.4k |
In: Civil Engineering
A highway embankment of formation width of 15 m and side slopes 1.5:1 is to be constructed. The ground level along the centerline is as follows in Table below. The embankment has a rising gradient of 1 in 200, and the formation level at zero chainage is 115.00. Assuming the ground is level across the centerline; compute the volume of earthwork.
| Chainage | 0 | 50 | 100 | 150 | 200 | 250 |
| GL (m) | 115.75 | 114.35 | 116.80 | 115.20 | 118.50 | 118.25 |
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: In mechanics, this quantity represents the total area under the stress–strain diagram, and therefore it indicates the maximum amount of strain energy per unit volume the material can absorb just before it fractures. Certainly this becomes important when designing members that may be accidentally overloaded. Which type of modulus is it? Describe it.
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Phases of behavior of RC beam in bending when the load increases from 0 to failure.
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c) Use your spreadsheet to estimate the position of the Risk
line, using any necessary “reality
checks”. In other words, justify or even make a clear statement of
the inadequacies of what
you have done and the need for further investigation. Estimate the
Risk value.
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Your task is to develop quantified Risk models of two Risks of
interest to you. This is an academic
exercise and its purpose is to make you familiar with the process
of quantified Risk modelling and
to show me you understand the theory and the practice.
a) Write up each Risk as a case study that explains the Risk in
detail and describes the proposed
control measures.
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reinforced concrete structure the roles of concrete and steel.
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Reinforced Concrete – concept and conditions to be fulfilled.
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