As compared to shallow-wells, deep wells have______________?
A. more depth
B. less depth
C. more discharge
D. less discharge
The distribution mains are designed for________________?
A. maximum daily demand
B. maximum hourly demand
C. average daily demand
D. maximum hourly demand on maxi¬mum day
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
The type of valve, which is provided on the suction pipe in a tube-well, is____________?
A. air relief valve
B. reflux valve
C. pressure relief valve
D. sluice valve
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