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Civil Engineering Waste Water Engineering Difficulty: Medium

If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is

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Spalling hammer is used for Consider the following operations: 1. Drilling 2. Blasting 3. Mucking 4. Placing steel 5. Placing concrete The correct sequence of these operations in tunnel construction is The type of arch generally constructed over a wooden lintel or over a flat arch for the purpose of carrying the load of the wall above is Lug angles . . . . . . . . The angle of projection for a range is equal to the distance through which the particle would have fallen in order to acquire a velocity equal to the velocity of projection, will be