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QuestionWhat is key application of inverted siphons? What are major drawbacks of using inverted siphons?
AnswerInverted siphons are planned at locations in which sewer system is blocked by anti-establishment utilities, storm water drains. They are now and then known as depressed sewers as it is claimed that there is no real siphon action. They attach upstream and downstream sewers with U-shaped straight up alignment such that they forever running full. Drawbacks of inverted siphons are-(i) They induce extra head loss to sewer system which is disagreeable in hydraulic performance.(ii) U-shaped siphons construct sediment accumulation trouble and earlier experience showed that inverted siphons were simply blocked due to siltation; (iii) Protection of overturn siphons is complicated due to its isolation.
Question What are the main drawbacks of curing by ponding and polythene sheets ? Answer Purpose of curing is to decrease the speed of heat loss of freshly placed concrete to atm
Five 1m diameter, 2m high cylindrical drums filled with earth are placed upright and side-by-side in a straight line across a 5m wide creek to form a simple dam completely blocking
Permissible Stresses in Steel As per the Indian code, the permissible stresses in the tendons at the time of initial prestressing should not exceed 80% of the characteristic t
Question Is it necessary joints of concrete kerbs be in line with joints in concrete carriageway ? Answer In regular practice, joints are provided in road kerbs to ca
Streams Not Wholly Alluvial In streams which are not wholly alluvial, consisting of bed of pebbles, rock, etc. the liner waterway is kept equal to the actual surface width of
Tests on Stones To ascertain the needed properties of stones, described tests can be conducted: A. Crushing strength test B. Water absorption test C. Abrasion te
Operation in chain surveying
Point of virtual fixity and critical length of lateral loading for piles Some engineers can get confused about the difference between the two terms which are point of virtual
Explain Energy Grade Line (EGL) Graph of the sum of the potential, pressure and kinetic energies along a pipe or open channel. Energies are plotted along the y-axis above a dat
Actually, drying is not directly linked to hardness in concrete. After concrete is poured, putting it in a wet environment by spraying it constantly with water will hasten its hard
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