A. ultra violet rays treatment
B. lime treatment
C. by using potassium permanganate
D. chlorination
Related Mcqs:
- Disinfection efficiency is________________?
A. reduced at higher pH value of water
B. unaffected by pH value of water
C. increased at higher pH value of water
D. highest at pH value equal to 7 - Disinfection of water results in______________?
A. removal of turbidity
B. removal of hardness
C. killing of disease bacteria
D. complete sterilisation - The disinfection efficiency of chlorine increases by_______________?
1) decreasing the time of contact
2) decreasing the temperature of water
3) increasing the temperature of water
The correct answer is ?
A. only (1)
B. both (1) and (2)
C. both (1) and (3)
D. only (3) - Most suitable section of sewer in separate sewage system is________________?
A. rectangular section
B. circular section
C. standard form of egg shaped sewer
D. modified egg shaped section - The suitable method of forecasting popu¬lation for a young and rapidly increasing city is_________________?
A. arithmetical increase method
B. geometrical increase method
C. incremental increase method
D. graphical method - Which of the following methods of analysis of water distribution system is most suitable for long and narrow pipe system ?
A. circle method
B. equivalent pipe method
C. Hardy cross method
D. electrical analysis method - The population of a town in three consecutive years are 5000, 7000 and 8400 respectively. The population of the town in the fourth consecutive year according to geometrical increase method is________________?
A. 9500
B. 9800
C. 10100
D. 10920 - The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is________________?
A. circle method
B. equivalent pipe method
C. electrical analysis method
D. Hardy cross method - As compared to geometrical increase method of forecasting population, arithmetical increase method gives________________?
A. lesser value
B. higher value
C. same value
D. accurate value - The suitable layout of distribution system for a city with roads of rectangular pattern is______________?
A. grid iron system
B. dead end system
C. ring system
D. radial system
