Related Questions

The effective size of sand particles used in slow sand filters is
A 0.25 to 0.35 mm
B 0.35 to 0.60 mm
C 0.60 to 1.00 mm
D 1.00 to 1.80 mm
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
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
Air binding phenomena in rapid sand filters occur due to
A Excessive negative head
B Mud ball formation
C Higher turbidity in the effluent
D Low temperature
The yield of a rapid gravity filter as compared to that of slow sand filter, is
A 10 times
B 15 times
C 20 times
D 30 times

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