What is most nearly the minimum curve length required to meet AASHTO's standard headlight sight distance requirements?
Assume the sight distance is ft. Which of the following is part of an activated sludge system when treating wastewater? The correct answer is C. The correct answer is B. The correct answer is D. The correct answer is A. We must choose the right one. In this case, the stress at the mid point of the clay layer will be the sum of the stresses above the mid point. Determine the appropriate settlement equation to use. Ultimately, we must solve for runoff.
Condition not true. There, you will find a long list of typical integrals. Use the parallel axis theorem to find the moment of inertia about the x axis for this composite shape. In this case, the composite shape shown in the problem can be broken down into a triangle 1 and a rectangle 2. This particular problem is a composite shape a rectangle plus a triangle. Because the Reference Handbook doesn't have a moment of inertia equation for this composite shape, we have no choice but to use the Parallel Axis Theorem to calculate the moment of inertia.
In other words: if the overall shape is found in the FE Reference Handbook tables squares, triangles, etc , use the moment of inertia equation the Reference Handbook has for that shape. If the Handbook doesn't have the shape you're looking for, then you'll have to use the Parallel Axis Theorem to solve for the moment of inertia.
Another situation where you would have to use the Parallel Axis Theorem over the Reference Handbook's standard moment of inertia equations is if you're asked to calculate the moment of inertia about an axis that is not the centroidal, x, or y axis! Let's say you're asked to calculate the moment of inertia of a square about an axis that is 1 cm off the x axis. The Reference Handbook doesn't have a moment of inertia equation for this custom axis, so you'll have to use the Parallel Axis Theorem to calculate the moment of inertia.
Aeration basin. Hardness treatment. The correct answers are A and B. Explanation: An activated sludge system is the most popular secondary treatment step of wastewater at a wastewater treatment plant. It is made of an aeration basin and a clarifier. The goal of the aeration basin is to create enough dissolved oxygen DO in the water via air diffusers to where bacteria in the water can remain alive.
In turn, this bacteria eats up the organic matter that is present in the wastewater. After enough dissolved oxygen has been created in the aeration basin via air bubbles, the wastewater is sent to another clarifier. Instead, select the "FE Reference Handbook". If you find doing many practice problems with detailed solutions as a good way to study for a test, we recommend you check out PrepFE.
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