Flow diagram of water supply and Activated sludge process

Question 1. Draw the flow diagram of essential element of water supply?
Exam Name: PGCL 2017

Answer:

                                              Figure: Water supply system

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Question 2. Draw flow diagram of activated sludge process.
Exam Name: PGCL 2017, RRI 2014

Answer:  

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Question 3. Abbreviation of the below term.                   
EST, STP, BOD, COD, ECR
Exam Name: PGCL 2017

Answer:

EST= Eastern Standard Time
STP= Standard Temperature and Pressure
ECR = Enviornment cleaning Roller
BOD= Biological Oxygen Demand
COD= Chemical Oxygen Demand 

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