10 Questions
RSPM are the primary polutants emitted by natural and human activities eg soot, dust or smoke particles which is measured by particular yard stick
RSPM is generally classified as PM10 (diameter 10-2.5 micron)
PM 2.5 under 2.5 micron , it affect the lungs most
asthma and bronchial diseases are the results of RSPM
Vent pipe releases the obnoxious gases from the drainage system , it is fitted into the soil pipe to protect water seal against the siphonage and backflow. It should be of minimum 50mm diameter
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IS 456 plain and reinforced concrete code of practice
IS 1035 part 32 Methods of sampling and test ( physical and chemical) for water and waste water
IS 10500 2012 Drinking water specification
IS 1172 1993 basic requirements of water supply, drainage and sanitation
The following rates per capita per day may be considered the minimum for domestic and non domestic needs
1- for communities with a population ot upto 20000 and without a flushing system :- A water supply through stand post 40lpcd
B water supply through house service connection 70 to 100lpcd
2- for communities with a population of 20000 to 100000 together with a full flushing system 100 to 150lpcd
3- for communities with a population above 1.0 lac with a full flushing system 150lpcd to 200lpcd
ELR is stand for Environmental Lapse Rate
ALR is stand for Adiabitic Lapse Rate is equal to minus 9.8 degree centrigrade per 1000m rise
Lapse rate is the rate of change of temperature in troposphere with altitude
in two pipe system two sets of vertical pipes are laid ie one for draining night soil and the other for drainage sullage
the pipes of first set carrying night soil are call soil pipes and the pipes of second set carrying sullage from baths are called sullage pipes or waste pipes.
The soil pipes and the waste pipes are seperately ventilated by providing ventilation pipes or antisiphonage pipes
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Inlets are not provide in every types of sewer. It is provided fot the sewers which are large in size and which are meant to take out the storm water or rain water. But the sewers which are very small in size and only meant to take out domestic sewage are not provided with inlet
Catch basin is an engineered drainage structure with the sole function of collecting rainwater, also it is sometimes used in sewers for carrying drainage discharge.
If you have a property that has low elevation, inlets are a great choice for re-routing unwanted water accumulation. Another advantage of choosing inlets versus catch basins is that inlets do not allow water to remain stagnant within the basin, so you won't have to worry about inadvertently creating a mosquito haven.
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