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
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 - 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 polluted water is one which_______________?
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 - 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 - Alum as a coagulant is found to be most effective when pH range of water is______________?
A. 2 to 4
B. 4 to 6
C. 6 to 8
D. 8 to 10 - 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 - 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 minimum dissolved oxygen which should always be present in water in order to save the aquatic life is______________?
A. 1 ppm
B. 4 ppm
C. 10 ppm
D. 40 ppm - 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 - Disinfection of water results in______________?
A. removal of turbidity
B. removal of hardness
C. killing of disease bacteria
D. complete sterilisation
