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Ventilation is defined as the process by which stale air inside an enclosure is replaced by fresh air from outside.
There are mainly three types of surveys which are as follows: Reconnaissance survey, Detailed survey, Preliminary survey etc.
Evaporation: In this process due to solar radiation, during the day time the water in the liquid form is transformed into gaseous form.
Piers are single unit supports carrying heavy loads and transferring them to deep-seated layers of soil or rock.They are of three types.
A cofferdam is a temporary structure designed to keep water and soil out of the excavation in which a bridge pier or other structure is built.
The principle of under-reamed pile foundations is the anchoring of the superstructure at a depth where the volume changes of soil are negligible.
In Reaction turbine, Pressure energy is first converted into kinetic energy before supplied to runner. It works on impulse reaction principle.
"Caissons" means box. Such box can be prefabricated on shore and then floated to the desired site, and is allowed to seat on prepared base.
Sedimentation is used to remove fine particles. The sewage is kept quiescent, for a given period, in a sedimentation basin.
Activated Sludge process is the sewage treatment of production of an activated mass of micro-organism which stabilizes the waste aerobically.
Underground power stations are in danger of falling rocks and snow avalanches. It is a valley from the site for a hydro power plant.
Evaporation: In this process due to solar radiation, during the day time the water in the liquid form is transformed into gaseous form.
The underground passages which are constructed without disturbing the ground surface are known as tunnels.
Seismic waves are the waves which are formed by sudden breaking of rock within the earth. There are two types of waves: Body and Surface waves.
Piers are single unit supports carrying heavy loads and transferring them to deep-seated layers of soil or rock.They are of three types.
The Notice which invites tenders which is a written offer submitted by the contractors for carrying out the work at certain rates with terms and conditions laid down is called tender notice.
Weir is a crest wall constructed across a river to divert raise water of river into canal. Crest wall across a river raises the water.