Rajasthan Technical Education Second Year Paper 2016 – Public Health Engineering
Alum is chemically
(a) Copper sulphate
(b) Aluminium sulphate
(c) Ferrous sulphate
(d) Ferric sulphate
Hardness of water is caused due to
(a) Calcium sulphate
(b) Magnesium sulphate
(c) Calcium bicarbonates and nitrate
(d) All the above
The maximum permissible hardness for water supplies is
(a) 95 mg/lit
(b) 105 mg/lit
(c) 115 mg/lit
(d) 125 mg/lit
Most common surface water supply source is
(a) Sea
(b) River
(c) Pond
(d) Lake
The device installed for drawing water from sources are called
(a) Filters
(b) Intakes
(c) Aquifers
(d) None of the above
The dosage of coagulant depends upon
(a) turbidity
(b) pH value
(c) colour
(d) all the above are correct
Air relief valves in water supply pipe line are provided at
(a) pipe bends
(b) pipe joints
(c) summits
(d) low points
In order to consider temperature changes, metal pipes are usually provided with
(a) Expansion joints
(b) Contraction joints
(c) Anchorage
(d) Pressure relief valve
By which method we can calculate accurate estimate of the increase in population is called
(a) arithmetical increase method
(b) geometrical increase method
(c) incremental increase method
(d) graphical method
In Indian conditions the daily domestic need of water is generally
(a) 25 liter
(b) 40 liter
(c) 70 liter
(d) 135 liter
The permissible limit of turbidity of water for domestic use of
(a) 2 to 5 ppm
(b) 5 to 10 ppm
(c) 10 to 15 ppm
(d) 15 to 20 ppm
The permissible limit of B.O.D in domestic water should be
(a) Zero
(b) 100 ppm
(c) 150 ppm
(d) 200 ppm
The theoretical time of detention of water in sedimentation tank is called
(a) Basin period
(b) Detention period
(c) Settling period
(d) All are correct
First step of water treatment is
(a) Mixing and coagulation
(b) Sedimentation
(c) Filtration
(d) Disinfection
For the protection from diseases to public, mixing of chlorine more than breaking point is called
(a) Super chlorination
(b) Plain chlorination
(c) Post chlorination
(d) None of above
Leave a Reply