In a rapid sand filter, the time for reaching particle break through (T,) is defined as the time elapsed from start of filter run to the time at which the turbidity of the effluent from the filter is greater than 2.5 NTU. The time for reaching terminal head loss (T,) is defined as the time elapsed from the start of the filter run to the time when head loss across the filter is greater than 3 m. The effect of increasing the filter depth (while keeping all other conditions same) on T, and T is H. (A) T, increases and T, decreases. (B) Both T, and T, increase. (C) T decreases and T, increases. (D) Both T and T, decrease.

In a rapid sand filter, the time for reaching particle break through (T,) is defined as the time elapsed from start of filter run to the time at which the turbidity of the effluent from the filter is greater than 2.5 NTU. The time for reaching terminal head loss (T,) is defined as the time elapsed from the start of the filter run to the time when head loss across the filter is greater than 3 m. The effect of increasing the filter depth (while keeping all other conditions same) on T, and T is H. (A) T, increases and T, decreases. (B) Both T, and T, increase. (C) T decreases and T, increases. (D) Both T and T, decrease.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.

Question

In a rapid sand filter, the time for reaching
particle break through (T,) is defined as the
time elapsed from start of filter run to the time
at which the turbidity of the effluent from the
filter is greater than 2.5 NTU. The time for
reaching terminal head loss (T,) is defined as
the time elapsed from the start of the filter run
to the time when head loss across the filter is
greater than 3 m.
The effect of increasing the filter depth
(while keeping all other conditions
same) on T and T
is
(A) T increases and T
decreases.
(B) Both T and T
increase.
(C) T decreases and T, increases.
(D) Both T and T
, decrease.

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