Name :
Roll no :
Date :
( Environmental Engineering – I )
Maximum marks : 20
Circle the correct answer.
1. Phenophthalein in acidic solution is
a) Pink coloured
b) Yellow coloured
c)
Colourless
d)
Purple coloured
2. Turbidity is measured on
a) Standard silica scale
b) Standard cobalt scale
c)
Platinum cobalt scale
d) Both b & c
3. The most common cause of acidity in water is
a) Hydrogen
b) Oxygen
c)
Nitrogen
d)
Carbon Dioxide
4. Which of the following causes a decrease in per capita consumption?
a) Hotter climate
b) Better standard of living of the people
c) Use of metering system
d) Good quality of water
5. Standard EDTA (ethylene diamine tetra acetic acid) solution is used to determine the
a) Residual chlorine in water
b) Hardness in water
c) Turbidity in water
d) All of these
6. The working conditions in imhoff tanks are
a) Anaerobic only
b) Aerobic only
c)
Anaerobic in lower compartment and aerobic in upper compartment
d)
Aerobic in lower compartment and anaerobic in upper compartment
7. Disinfection efficiency is ____________ at higher pH value of water
a) Unaffected
b) Reduced
c)
Increased
d)
None of these
8. The permissible limit of turbidity of domestic water is ______ ppm
a) 30 - 40
b) 25 - 30
c)
5 - 10
d)
13 - 18
9. pH of pure water _______________ with rise in temperature
a) Slightly increases
b) Slightly decreases
c)
Remain same
d)
None of these
10. The most suitable method of forecasting population for a young and rapidly increasing city is
a) Arithmetical increase method
b) Geometric increase method
c) Incremental increase method
d)
Both a & c
Answer the following
i-
Define turbidity?
ii-
What is buffer solution?
iii-
What is the relation between pH and temperature?
iv-
Define acid-base titration?
v-
Write down the full form of NTU?