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Explain the Corrosion by the Action of Bacteria?
Corrosion can also be accelerated by the action of bacteria. In the absence of oxygen, sulphate-reducing bacteria can grow, and the sulphides produced by these can cause rapid attack on steel. Some bottom sediments are oxygen deficient and sulphate-reducing bacterial attack can occur on buried steel in such sediments. The presence of limited growth of barnacles tends to increase the amount of pitting. There are opinions that heavy growth of barnacles tends to check corrosion. However, there are contrary views also.
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Define the Net Positive Suction Head All values in the equations are in units of feet. Note: Only use values related to the suction side of the pump. NPSHR = Net Posi
short note
A load of 3000 kN is being taken by a square column footing. Side of the column is 3 m, footing rests on a silty soil with a Poisson's ratio = 0.3. Modulus of elasticity of the soi
State the Short Term Effects of concrete These are various types of effects produced, nearly instantaneously, due to the application of external loads on structures. An example
Q. Concrete cover to enhance fire resistance? In the event of exposing concrete structures to a fire, a temperature gradient is established across the cross section of concrete
why is the foundation failure?
fly levelling
Question How does an engineer determine digit of cells for concrete box girder bridges ? Answer If depth of a box girder bridge exceeds 1/6 or 1/5 of bridge width, then it is o
Which of the following stress-strain curves represents a soft and weak material? Solution: As depicted, stress is on the y-axis while the x-axis represents strain.Whe
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