A. contains pathogenic bacteria
B. consists of undesirable substances rendering it unfit for drinking and domestic use
C. is safe and suitable for drinking and domestic use
D. is contaminated
Related Mcqs:
- Assertion A : The consumption of water increases with increase in the distribution pressure. Reason R : Higher distribution pressure causes more loss and waste of water. Select your answer according to the coding system given below?
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true - The depression of water table in a well due to pumping will be maximum_______________?
A. at a distance R from the well
B. close to the well
C. at a distance R/2 from the well
D. none of the above
where R is the radius of influence - Residual chlorine in water is determined by________________?
A. starch iodide method
B. orthotolidine method
C. both (A) and (B)
D. none of the above - If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to________________?
A. total alkalinity
B. total hardness
C. total hardness – total alkalinity
D. non carbonate hardness - 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 - Chlorine demand of water is equal to________________?
A. applied chlorine
B. residual chlorine
C. sum of applied and residual chlorine
D. difference of applied and residual chlorine - 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 - Average rate of water consumption perhead per day as per Indian Standard is______________?
A. 100 litres
B. 135 litres
C. 165 litres
D. 200 litres - The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?
A. reflux valve
B. sluice valve
C. air relief valve
D. pressure relief valve - On standard silica scale, the turbidity in drinking water should be limited to_______________?
A. 10 ppm
B. 20 ppm
C. 30 ppm
D. 50 ppm
