Related Questions

Deaeration of high pressure boiler feed water is done to reduce
A Foaming from boilers
B Its dissolved oxygen content
C Its silica content
D Caustic embrittlement
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
A Filtration
B Digestion
C Sedimentation
D Both B and C
A sink contains exactly 12 liters of water. If water is drained from the sink until it holds exactly 6 liters of water less than the quantity of water drained away, how many liters of water were drained away ?
A 2
B 3
C 9
D 6
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
A Decreases
B Increases
C Remains constant
D May increase or decrease ; depends on the chemical characteristics of polluted water
In water treatment plant, zeolite process is used to remove the __________ of water.
A Acidity
B Alkalinity
C Hardness
D Iron & zinc
A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25% ?
A 4
B 5
C 8
D 30
A mixture of 20 sprit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%
A 2
B 4
C 5
D 6
30 men took a dip in a water tank 20m long and 15m broad on a religious day.If the aveage water displacement of water by a man is 2m3, then the rise in the water level in the tank will be --
A 20 cm
B 50 cm
C 100 cm
D 200 cm
In a 729 liters mixture of milk and water , the ratio of milk to water is 7:2 To get a new mixture containing milk and water in the ratio 7:3 the amount of water to be added is -
A 71 liters
B 81 liters
C 56 liters
D 50 liters
A mixture of 20 kg of sprit and water contains 10% water. How much water must she added to mixture to raise the percentage of water to 25%
A 2
B 4
C 5 days
D 6

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