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You are filling in a few days for the project engineer who is on vacation. The project is a 16 story building. The 4th floor slab was poured on Friday. On Monday you get a call from the design engineer informing that the concrete strength of the newly poured slab achieves enough strength for the...

For those who will take the WR/Envi depth, there are approx. 6 questions (15% in PM session) related to open channel flow. I bet at least one question is on Manning formula; but they don't give you a simple or straightforward question. Try this: A trapezoid cross section channel with bottom...

You are assigned to be the project manager of a 20-story concrete building. The concrete structures from the second level to the top level are consistent. The construction schedule plans for one floor slab concrete pour per week. You need to estimate how many steel jacks it would need to support...

Example 19-10 (CERM page 19-21) At a particular point in an open rectangular channel (n=0.0013, S=0.002, and W (or B) =10 ft) the flow is 250 cfs and the depth is 4.2 ft. How far from this point will the depth be 4.0 ft? The solution has steps to follow: Step 1: find v1, E1 and R1 Step 2...

Appreciate if anyone has the Table 3.7 of the AASHTO Greenbook passing sight distance. My e-mail is ngmngoc$mail.com (replace $ with ampersand). Thanks.

Attached are 2 problems dealing with pressure conduit. I don't think CERM has this. I saw it in Testmaster note. This kind of problem looks very basic but it would take time to solve because one needs to apply Bernouilli eq, head loss formula, Moody chart, friction coefficient, minor loss...

The existing trapezoid shaped channel has the following data: Bottom width: 16.0 ft Side slope: 1.5 (horizontal to vertical) Bed slope: 0.0018 Manning coefficient: 0.02 Current maximum depth of flow: 6.0 ft Due to near future development, the channel needs to be excavated deeper to provide...

You are assigned to provide a concrete mix for a small project, after doing some research you come up with the following trial mix: "Cement : sand : 3/4-in aggregate" ratio is 1 : 2 : 2.5 w/c ratio is 0.45 air entrained for concrete is 5% cement unit weight is 195 pcf both sand and 3/4-in...

Pressure conduit problem A fire hydrant was installed at one end of a 480 ft long, 6-in cast iron water line. The other end of this water line connected to a 12-in water main. You are asked to calculate the pressure at the fire hydrant if the fire flow is 1000 gpm and the water pressure at the...

The next topic on the list of WR module is Energy/Continuity equation. There was a post some days ago about Bernouilli equation and it's a kind of plug and chug solution. Well, they are not that stupid to give out many freebies. Here is a problem which is exam type (this problem is very...

I went through the NCEES list of topics required for WR PM , the first one is "Spillway capacity" I have not seen many practice problems on this topic, the second one is "Energy dissipation" I have one problem to try for today. The depth before the hydraulic jump of the 100 ft wide rectangular...

A flow of 450 cfs partly fills a concrete pipe with diameter = 8 ft . What is the nearest value of critical velocity in fps? A/ 14.4 B/ 15.2 C/ 16.0 D/ 16.6 With the correct answer from the above problem, what is the nearest value of critical slope? A/ 0.0015 B/ 0.0021 C/ 0.0049 D/ 0.0076

Critical depth, critical velocity, critical slope…are critical! In design hydraulic conveying system, the engineer needs to know the critical slope to calculate the limit the water can flow just like a transportation engineer designing a section of hilly road, it can’t be too steep nor flat...

Which substance/material is NOT an alternative/additive to Portland cement: A/ Ground granulated blast furnace slag B/ Magnesium alloys powder C/ Fly ash D/ Silica fume Hint: check wikipedia.com

I'd like to have the solution of this ground water problem (see attachment). Please help. Thanks. Groundwater_aquifer_problem_12.pdf

Question 115 of the Morning Sample Questions (page 27) in the "NCEES Sample Questions & Solutions" book. Why the solution (p. 140) states that the station of the PI is equal to station PC plus the distance T (tangent) ? Why not equal to station PC plus half of the length of curve L ? I...

Attached you can find 2 open channel problems. They are similar. The first one is from the NCEES sample PE question, page 109. The second one is for you to practice. Take out your calculator, reference book and start your stopwatch, start to solve it. Obviously if you want to take the exam...

Design the most efficient flow rectangular shaped cross-section open channel, maximum velocity is 2.00 ft/sec , given flow of 200.00 cfs , Manning value is 0.013. What is the nearest value of slope? A/ 0.07 B/ 0.09 C/ 0.12 D/ 0.15

You are working for United Developers, Inc. (UDI). UDI just acquired a tract of land at the dead-end of Sunny Rd. which connects to Lamar Rd., a main road. The length of Sunny Rd is 650 ft. There is a 12-in water main along Lamar Rd. An existing 6-in water main connects the 12-in water main...