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Civil Engineering

Civil Engineering is a profession of designing and executing structural works that serve the general public, like houses, buildings, roads, etc. A Civil Engineer is an engineer trained in the design and construction of public works, such as bridges or dams, and other large facilities.

4,921 Questions

What is the difference between a rock and a boulder?

rock is natural while stone is artificial.the rock found under the earths surface while the stone found anywhere on our earth's surface.

How is an orthophoto map different from a topographic map?

An orthophoto map is a true-to-scale aerial image that has been corrected for distortions caused by topography, whereas a topographic map represents the Earth's surface with contour lines to show elevation changes. Orthophoto maps are useful for visual interpretation, while topographic maps provide detailed information on terrain features and elevation.

What earthquake magnitude can a brick building withstand?

it all depends on the material that they build there building. In this case a brick building can resist if it has a good foundation of ground if not it could collapse. My best guess is less than 7.o or 6.6.

How do you glue wood to wood?

To glue wood to wood, apply a thin, even layer of wood glue to the surfaces you want to bond. Press the pieces together firmly and then clamp them in place until the glue dries, following the instructions on the glue bottle. Allow the glued wood to cure for the recommended time before handling it to ensure a strong bond.

13200 metric tons is how many cubic meters?

To convert metric tons to cubic meters, you need to know the density of the material. The relationship between metric tons and cubic meters depends on the density of the substance being measured. For example, for water, 1 metric ton is equal to 1 cubic meter.

Is there a geological phenomenon that swallows up people?

Sink holes are surface subsidence structures that form due to the collapse of underground voids. These voids may form naturally (e.g. due to the dissolution of rocks such as limestone or gypsum by groundwater) or be man made (e.g. mine workings). The surface subsidence pit can vary greatly in depth and diameter from less than a metre wide and 1/2 a metre deep to tens of metres in diameter. They don't swallow people up, however it would be possible for a person to fall into one of these features. There have also been occurrences where they have formed under or close to buildings causing instability and even collapse and which have caused fatalities.

Some further explanation of the sink hole phenomenon along with pictures of sink holes and the damage they can cause can be seen by viewing the related links.

How does one neutralize methane in a lift station?

It all depends on what you mean by neutralize. Methane is a gas given off when organic material decays with little of no oxygen present. It is an odorless flamable gas. Usually there are other gases formed at the same time (such as hydrogen sulfide) that has a bad smell. There is not much that can be done about it except vent it to the atomosphere to prevent explosions. In large treatment plants, it is collected and burned as a fuel but this is not practical in a lift station.

Anaerobic decay can be stopped by adding an oxidident such as chlorine. This kills the bacteria and stops decay until the chlorine combines into stable compounds. Then the decay will resume.

One way to prevent or minimize methane in the design process, is to dispatch the wastewater as quickly as possible. The longer it sits, in the tank, the more the decay and the more methane is produced. This can be accomplished by pumping more often. States usually regulate the storage and pumping requirements which may interfere with a good solution. They are less concerned with odor than they are making the station big enough to handle large periodic loads... which may increase the time the wastwater sits during times of low flows.

One simple improvement might be to pump the tank down at night (when the flow drops off) whether it has reached the "pumps on " level or not.. so it doesn't sit all night while the population is sleeping.

What are the positive and negative aspect of bridge?

Positive aspects of bridge include promoting critical thinking, improving memory and concentration, and fostering social connections. Negative aspects may include the time commitment required to learn and play the game, and the potential for disagreements or tension among partners during play.

What is waterproof cement?

Waterproof cement is a type of cement that is formulated to resist water penetration and moisture ingress. It is commonly used in projects where water resistance is important, such as basements, swimming pools, and other water-retaining structures. Waterproof cement typically contains additives that enhance its resistance to water and help prevent water damage.

What is the definition of spring line?

It is the the clothing collection that a fashion designer designs for the spring.

It can also be a fall line, summer line, resort collection, winter collection, or a spring/summer line.

Under what conditions should you use wet sieving instead of dry sieving?

Wet sieving is typically used when the sample material is cohesive, contains fines, or when the particles are highly irregular in shape. It helps to overcome issues such as agglomeration, particle trapping, or size underestimation that can occur in dry sieving. Wet sieving is also useful when accurate particle size distribution data is needed for fine-grained materials.

What is High density polymer concrete?

What is Polymer concrete?

It is also known as resin concrete because synthetic resins are used instead of cement in its manufacturing.

Density of cement concrete
  • Density of normal concrete is in the order of about 2400 kg per cubic metre. The density of light-weight concrete will be less than 1900 kg per cubic metre.
  • To call the concrete, as high density concrete, it must have unit weight ranging from about 3360 kg per cubic metre to 3840 kg per cubic metre, which is about 50% higher than the unit weight of conventional concrete. They can, however be produced with the densities upto 5280 kg per cubic metre using iron as both fine and coarse aggregate.
  • The high density concrete is used in the construction of radiation shields.

Density of polymer concrete

  • Normally, the density of polymer concrete is not more than 2260 kg per cubic metre, when you use normal aggregates like granite stone chips and river sand as you do in standard cement concrete.
  • When you use aggregates obtained from iron ore or iron rod pieces, you can make high density polymer concrete upto 5140 kg per cubic metre.

At least 3 example of alloy steel?

  1. Stainless steel: an alloy of iron, chromium, and sometimes other metals like nickel or molybdenum, known for its corrosion resistance and durability.
  2. Tool steel: an alloy of iron and carbon, often with additional elements like vanadium or tungsten, used for making cutting tools and dies due to its hardness and wear resistance.
  3. High-strength low-alloy (HSLA) steel: an alloy of iron with small amounts of other metals like manganese or copper, designed for improved strength, toughness, and weldability compared to traditional carbon steels.

What is the fineness modulus of sand?

The Fineness Modulus (FM) is an index number which is roughly proportional to the average size of the particles in an aggregate sample. It is obtained by adding the cumulative percentages coarser than each of the standard sieves used for segregating sand and dividing the cumulative percentage by 100.

What is difference between plasticizer and superplasticizer?

Superplasticizers or high range water reducers or dispersants are chemical admixtures that can be added to concrete mixtures to improve workability. Adding 1-2% superplasticizer per unit weight of cement is usually sufficient

What are the 3 primary GIS data types that GPS receivers collect?

The 3 primary GIS data types that GPS receivers collect are: spatial data (latitude and longitude coordinates), attribute data (information about the location like elevation or time), and metadata (details about the data collection process such as accuracy or date).

What makes a suspension bridge strong?

First of all triangles are most probably the strongest shape and the suspension bridge has lots of triangles.

Second of all it has posts next to the posts (attached to each other by steel rope) that makes a triangle shape. (it can be rounded too)

What are the mode of failure of a 'Flexible' and a 'Rigid' pavement in the contents of 'High way engineerin'?

Flexible pavement typically fails due to fatigue cracking, rutting, and moisture damage. In contrast, rigid pavement tends to fail through joint and crack spalling, corner breaks, and pumping of fines from underlying layers.Understanding the specific failure modes for each type of pavement is crucial for designing and maintaining highways effectively.

Is wood glue or elmers glue better to hold wood together?

There are many kinds of glue for wood. Generally, yellow or light-brown wood glues will provide the strongest joint.

Titebond is a general purpose glue that is a good choice. Titebond III is more waterproof, and has a longer "open time", meaning you have more time to assemble parts, handy for complex assemblies.

Elmer's White Glue (Glue-All) is nearly as strong as Titebond for wood, is more widely available, and is said to have a longer open time than Titebond III.

I just learned about Titebond Extend glues, which have an open time of 15-20 minutes.

Resin glues (Gorilla) and epoxy have longer open times yet, but have much longer setting time, so your clamps will need to stay in place longer - maybe 18 hours.

There are a lot of opinions on the subject on the many woodworking forums - just search for some of the terms of interest.

What are the black ven cliffs made of?

Black Ven cliffs are composed of Lower Jurassic marls that are very prone to landslipping. See HOUSE, M.R. 1993. Geology of the Dorset Coast. Geologists' Association Guide No. 22. The Geologists' Association, London, x +164 p. 32 Plates. ISBN 0 900717 58 0.

What is well loss?

Well loss is the reduction in production or efficiency of a well, often due to factors such as mechanical issues, formation damage, or decline in reservoir pressure. It can lead to decreased oil or gas output and may require mitigation measures to restore or improve production levels.

What is the largest truss in the world?

The largest truss structure in the world is believed to be the Kelpies in Scotland. Each of the two horse head sculptures is made up of over 17,000 individual pieces of stainless steel, creating a vast truss-like design.

Is vitallium a alloy?

Yes, Vitallium is a type of cobalt-chromium alloy that is commonly used in dental and medical implants due to its biocompatibility and corrosion resistance.

What does the word dredging mean?

1. Any of various machines equipped with scooping or suction devices and used to deepen harbors and waterways and in underwater mining.

2. Nautical A boat or barge equipped with a dredge.

3. An implement consisting of a net on a frame, used for gathering shellfish.

Luoyang Max Import & Export is professional in dredging pipeline----HDPE pipes, rubber hoses, PE floaters and so on. Warmly welcome to your inquiry. Email: cathy@ly-max.com

That should help.

Can a GPS be used to find elevation of a point?

Yes, some GPS devices have the capability to provide elevation information of a specific point. This feature may require a device with a barometric altimeter or access to elevation data from satellites or maps.