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1.Under what situation shall engineers use jacking at one end only and from both ends in prestressing work?
2.If a contractor proposes to increase concrete cover beyond contractual specification (i.e. 40mm to 70mm), shall engineers accept the proposal?
3.If on-site slump test fails, should engineers allow the contractor to continue the concreting works?
4.Is it desirable to use concrete of very high strength i.e. exceeding 60MPa? What are the potential problems associated with such high strength concrete?
After operating for a period of time, assume that the opening size decreases to 10-mm due to the accumulation of materials (debris) on the screens.
Crude oil flows through a level section of the Alaskan pipeline at a rate of 1.6 million barrels per day (1 barrels=42 US gallons) the pipe inside diameter is 48 inch and its roughness is equivalent to galvanized iron.
Design the temperature reinforcement, tie bars, and dowel bars for a highway concrete pavement with 13 inch slabs, f'c=3500 psi, traverse joints at 35 ft apar,t and with 3 12 ft lanes each way. Use grade 60 steel
A hole is drilled in an aluminum plate with a steel drill bit whose diameter is 6.245 cm at 20 degrees Celsius. In the process of drilling, the temperatures of the drill bit and plate rise to 168 degrees Celsius.
If the barometer reads 102 kPa abs, what is the partial pressure of the dry air, and what is its specific weight. What is the specific weight of the atmosphere (air plus the water vapor present).
Estimate the velocity with which you would contact the ground if you jumped from an airplane at an altitude of 500ft and a) air resistance is negligible, b) air resistance is important, but you forgot your parachute, and c) you use a 25-ft-diameter p..
A combined pitot static tube has a coefficient of 0.98. Thedifferential head reading is 0.874m of water when it is positionedon the centreline of a pipe of constant diameter.
A polystyrene rod consisting of two cylindrical portions AB and BC is restrained at both ends and supports two 6 kip loads. Knowing that E = 0.45 * 10^6 psi,
a line was measured five times, the readings were: 100.08, 100.51, 100.32, 100.16, 100.22. what is the error. What is the most probable length.
A liquid has the peculiar property that its mass density increases linearly with depth according to the expression p = p_water (1+0.01d) where d is the depth below the liquid surface in meters.
The dissolved oxygen of sample water is 1.5 mg/L. At 25 C, the dissolved oxygen of the dilution water is 8.25 mg/L. You are told the BOD5 of the sample is 130 mg/L. You have a target final dissolved oxygen of 3.0 mg/L
A flow of 0.1 cum/s flows down in a rectangular channel of width of 0.6m and having and adjustable bottom slope. If chezys constant C is 56, determine the bottom slope necessary for uniform flow with a depth of flow 0.3m.
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