Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Assistant Engineer' And exam conducted in the year 2022. And Question paper code was '121/2022'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
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While testing for COD of sewage, organic matter is oxidized by K,Cr,O, in the presence of :
(A) HCl (B) H,S80,
(C) HNO, (D) None of these
High COD to BOD ratio of an organic pollutant represents :
(A) High biodegradability of the pollutant
(B) Low biodegradability of the pollutant
(C) Presence of free oxygen for aerobic decomposition
(D) Presence of toxic material in the pollutant
Primary treatment of sewage is meant for :
(A) Removal of dissolved organic matter
(B) Removal of fine suspended organic matter
(C) Removal of larger suspended matter
(D) Removal of pathogenic bacteria
The following residual chlorine compounds are formed during chlorination of water :
1. NH,Cl,
9. ۳
3. 100
4. 0617
The correct sequence of formation of these residual chlorine compounds is :
(^) 2,1,4,3 (B) 1, 2, 4, 8
(0) 1, 2, 8, 4 (0) 2,14
Imhoff cone is used to measure, in sewage :
(^) Total solids (B) Total inorganic solids
(C) Total organic solids (D)_ Settleable solids
Standard 5 day BOD at 20°C, when compared to ultimate BOD, is about :
(A) 58% (B) 68%
(C) 98% (D) None of these
The graph between the amount of organic matter left in sewage, and time elapsed in days is:
(^) Linear ൯) Parallel to time axis
(C) Exponential (D) None of these
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