Explore topic-wise InterviewSolutions in Civil Engineering.

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The cleaning of slow sand filter is done by

Answer» A small biological sand filter (slow sand filter or Biosand filter) is maintained or cleaned by actively managing only the top 5 cm of sand. This top layer is either removed and replaced when the flow rate becomes unacceptable (typically 4 to 6 months) with clean sand or "wet harrowed" meaning the sand is gently agitated causing partial break up of the biological surface. This may be slightly different for a very large slow sand filter; more sand and more work. A rapid sand filter is maintained and cleaned by forcefully injecting water backwards through the entire sand bed every 2 or 3 days. Backwashing a biological sand filter will destroy it and may result in people getting very sick if water from it is being consumed.
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2.

The waste stabilization ponds can be

Answer» Waste or Wastewater Stabilization Ponds (WSPs) are large, man-made water bodies in which blackwater, greywater or faecal sludge are treated by natural occurring processes and the influence of solar light, wind, microorganisms and algae . The ponds can be used individually, or linked in a series for improved treatment. There are three types of ponds, (1) anaerobic, (2) facultative and (3) aerobic (maturation), each with different treatment and design characteristics. Source: https://www.sswm.info/node/8199
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3.

A clay sample has a void ratio of 0.50 in dry state and specific gravity of solids = 2.70. Its shrinkage limit will be

Answer» You can find the answer here. http://www.meritanswers.com/questions/shrinkage-limit-of-a-clay-sample/13282-1-1
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4.

A rigid bar is supported by a spring as shown in the given figure.The deflection of the point will be

Answer» The Force in spring F = (500x2L)/L = 1000N. Deflection in the spring δ = F/k = 1000/50 = 20mm. Deflection at the point B = 2δ = 40mm downward.
Discussion