STUDY LESSON:-46 [CIVIL ENGINEERING]
For Competitive exams/Govt. jobs/Semester exam/Self Study Purpose
1. What should be the permissible limit of chloride and sulphate in a Drinking water in the absence of alternative source as per IS10500:2012
a) 250 and 200 b) 200 and 250 c) 500 and 1000 d) 1000 and 400
2. Zero Hardness of water is achieved by
a) excess lime treatment b) lime soda process c) excess alum and lime treatment d) ion exchange method
3. Total Kjeldahl Nitrogen (TKN) is the sum of the concentration of ______________
4. The sag of Dissolved oxygen curve occurs due to ______________
5. In reinforced concrete sewer the crown corrosion is caused due to
a) H2S b) CO2 c) NH3 d) CH4
6. The most important type of species which involved in the degradation of organic matter in the case of activated sludge method is
a) heterotrophs b) autotrophs c) photo-autotrophs d) none of theses
a) heterotrophs b) autotrophs c) photo-autotrophs d) none of theses
7. Which of these two are biodegradable components of Municipal Solid waste
a) leather and Tin cans b) cardboard and glass c) food waste and garden trimming d) plastic and wood
8. What is the reference pressure of sound/pressure level?
9. If in a particular city 20000 operating vehicle annually travels 12000 km/vehicle and emits NOx of 2g/km per vehicle then what will be the total annual release of NOx
a) 480000 kg b) 48000 kg c) 4800 kg d) 480 kg
9. If in a particular city 20000 operating vehicle annually travels 12000 km/vehicle and emits NOx of 2g/km per vehicle then what will be the total annual release of NOx
a) 480000 kg b) 48000 kg c) 4800 kg d) 480 kg
10. Biological solid Retention is defined by the ratio of ______________
Answers:-
1. d) 1000 and 400
2. d) ion exchange method
3. Organic Nitrogen and ammonia in sewage
4. its function of both addition and depletion of oxygen from the stream
5. a) H2S
6. a) heterotrophs
7. c) food waste and garden trimming
8. 20 µPa
9. a) 480000 kg
10. mass of biomass in the system / mass of biomass leaving the system
5. a) H2S
6. a) heterotrophs
7. c) food waste and garden trimming
8. 20 µPa
9. a) 480000 kg
10. mass of biomass in the system / mass of biomass leaving the system
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