Related Questions

Village Q is to the North of the village P. The village R is in the East of Village Q. The village S is to the left of the village P. In which direction is the village S with respect to village R?
A West
B South-West
C South
D North-West
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?
A Chlorine
B Alkalis
C Benzene hexachloride
D Alkyl benzene sulphonate (ABS)
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
A Ozone and iodine
B Chlorine or its compounds
C Ultraviolet light for irradiation of water
D All of the above
As compared to shallow wells, deep wells have
A More depth
B Less depth
C More discharge
D Less discharge
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
A Food industry
B Municipal sewage treatment
C Petroleum refinery
D Iron & steel plant
Which of the following is the most widely used disinfectant in water treatment?
A Chlorine
B Irradiation of water by ultraviolet light
C Cation exchanger
D Coagulation
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
A 0.01
B 0.1
C 0.3
D 1
In a certain village, m liters of water are required per household per month. At this rate if there are n households in the village, how long (in months) will p liters of water last?
A p/mn
B mn/p
C mp/n
D np/n
Disinfection of water results in
A Removal of turbidity
B Removal of hardness
C Killing of disease bacteria
D Complete sterilisation
The suitable method for disinfection of swimming pool water is
A Ultra violet rays treatment
B Lime treatment
C By using potassium permanganate
D Chlorination

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