Related Questions

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
A Calcium sulphate
B Sodium chloride
C Sodium sulphate
D Magnesium chloride
Cation exchanger is regenerated usually with
A NaOH
B H2SO4
C Hydrazine
D Alum solution
Cation exchange resins used in water treatment is made from __________ resin.
A Urea formaldehyde
B Epoxy
C Amino
D Phenolic
In water treatment plant, zeolite process is used to remove the __________ of water.
A Acidity
B Alkalinity
C Hardness
D Iron & zinc
After taking 30 socks out of the washing machine, Shamim noticed that the ratio of blue socks to brown socks to black socks was 2:3:5. How many black socks were in the washing machine?
A 21
B 15
C 9
D 6
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration
A At time zero
B At the end of filtration
C When half the filtrate has been obtained
D At the end of filtration, but decreases with time subsequently
In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is
A 4
B $$\frac{1}{4}$$
C 1
D $$\frac{1}{2}$$
The ratio for the rate of washing to the final rate of filtration in a washing type of plate and frame filter is
A 0.25
B 0.50
C 0.75
D 1.25
The major disadvantage of lime soda process of water softening is that
A It is unsuitable for turbid and acidic water
B Huge amount of precipitate is formed which creates a disposal problem
C The effluent cannot be reduced to zero hardness
D It is unsuitable for softening the water of excessive hardness
The heat treatment process used for softening hardened steel is
A Carburising
B Normalizing
C Annealing
D Tempering

Next steps