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542 questions
What is an air entraining agents? Give some examples. What is efflorescence in concrete structure?
Air entraining concrete is made by mixing a small quantity of air entraining agent or by using air entraining cement.
How standard consistency test is done on cement? Explain the procedure briefly.
Standard consistency of cement paste is defined as that consistency which permits the Vicat plunger to penetrate to a point 5 to 7 mm from the bottom of the Vicat mould in this test.
Distinguish between retarders and accelerators. Under what circumstances are they used? Name some products and their dosage for use as accelerating and retarding admixtures.
It is an admixture that slows down the chemical process of hydration so that the concrete remains plastic and workable for long time.
Introduce Flow table test. How can sulphate attack be controlled?
This is a laboratory test, which gives an indication of the quality of concrete with respect to consistency, cohesiveness and the proneness to segregation.
Discuss plasticizers and superplasticizers, indicating their purpose. Name some products and their dosage for use as plasticizers and superplasticizers.
Plasticizers is used mainly to fluidity the mix and improve the workability of concrete, mortar or grout. Plasticizers are high range water – reducers.
What is Irrigation Engineering? What is the Main reason of Irrigation?
Technique of artificial application of water to the land in accordance with the crop requirement throughout the crop period
What are the ill effect of irrigation?
Disadvantages or Ill Effect of Irrigation, Water logging, Salinity and alkalinity of land
What Is Mixed Cropping?
Farmers frequently plant many crop varieties in one field in rain-fed regions so they may harvest the other crops in case one crop fails from a lack of water.
What are the essentiality of Irrigation in Hydro power generation?
In irrigation systems, variations in slope, or dips, occur at various points along the canal side bed. These elevation fluctuations
What factors influence the size of the basins in basin irrigation?
The size of the basins is influenced by several factors:
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