Related Questions

Period of cleaning of slow sand filters is about
A 24 - 48 hours
B 10 - 12 days
C 2 - 3 months
D 1 - 2 year
The rate of filtration in slow sand filters in million litres per day per hectare is about
A 50 to 60
B 100 to 150
C 500 to 600
D 1400 to 1500
Cartridge filters are termed as 'edge' filters, because of the fact that the
A Disks have very sharp edge
B Solids are not deposited at the edge of the disk
C Bulk of the solids are removed at the periphery of the disks
D None of these
In slow sland filters, the turbidity of raw water can be removed only up to
A 60 mg/litre
B 75 mg/litre
C 100 gm/litre
D 150 mg/litre
I have never seen such a slow coach like you, this small work has taken you three full months.-What does the idiom' a slow coach' mean?
A an irresponsidle person
B a careless person
C an unthoughtful person
D a very lazy person
I've never seen such a "Slow coach". Slow coach means ---
A an irresponsible person
B a careless person
C a thoughtful person
D a very lazy person
I've never seen such a "slow-coach" like you. Here "slow-coach" means ---
A an irresponsible person
B a careless person
C a very lazy person
D an unthoughtful person
For a loose sand sample and a dense sand sample consolidated to the same effective stress
A ultimate strength is same and also peak strength is same
B ultimate strength is different but peak strength is same
C ultimate strength is same but peak strength of dense sand is greater than that of loose sand
D ultimate strength is same but peak
The percentage of filtered water, which is used for backwashing in rapid sand filters, is about
A 0.2 to 0.4
B 0.4 to 1.0
C 2 to 4
D 5 to 7
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
A helium
B ozone
C oxygen
D methane

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