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Environmental Engineering

Environmental Engineering
Laying of sewers is usually done with the help of

A Theodolite
Sight rails and boning rods
A compass
A plane table

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Environmental Engineering
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by

COD > BOD > TOD
TOD > BOD > COD
BOD > COD > TOD
TOD > COD > BOD

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Environmental Engineering
In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be

200 ppm
100 ppm
400 ppm
300 ppm

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Environmental Engineering
The suitable layout of distribution system for a city with roads of rectangular pattern is

Dead end system
Radial system
Grid iron system
Ring system

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Environmental Engineering
Most suitable section of sewer in separate sewage system is

Modified egg shaped section
Standard form of egg shaped sewer
Rectangular section
Circular section

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Environmental Engineering
Which of the following chemical compounds can be used for de-chlorination of water?

Bleaching powder
Chloramines
Sulphur dioxide
Carbon dioxide

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MORE MCQ ON Environmental Engineering

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